Cucurbita, gourd, is a genus of herbaceous plants in the gourd family (Cucurbitaceae), native to Central, North, and South America, now widely cultivated in warm areas worldwide as a food plant and livestock feed. The genus has more than 20 species, but most cultivated crops are from C. maxima (winter squash), and C. pepo (summer squash), both of which are sometimes called marrow or vegetable marrow in the U.K. Three additional species are used to a lesser extent: C. moschata (known as pumpkin or winter squash); C. mixta (also known as pumpkin or winter squash, or sometimes called cushaw); and C. ficifolia (figleaf gourd or chilacayote). The horticultural literature is frequently confusing, because there are several different common names that may be applied to each species, and the same common name may refer to several different species.
Cucurbita species were already widely cultivated in North America before the arrival of Europeans. Archaeologists have found evidence of C. pepo in Mexico dated at from 7,000 to 5,000 B.C., along with artifacts from cultivation in numerous sites in the southwestern U.S. (Arizona, New Mexico, Colorado), and east to Illinois, from the past 2,000 to 3,000 years.
Cucurbita species are frost-intolerant herbaceous plants, usually annual but occasionally perennial, with fibrous or sometimes tuberous roots. Stems, which are more or less prickly, may be trailing or climbing (with tendrils) or upright and bushy (but under 1 meter tall). Leaves are simple, alternate, and shallowly to deeply lobed. Most species are monoecious; female flowers are generally yellow, with 5 petals, often fused at the base.
Cucurbita fruits, technically called pepos, come in an astonishing range of shapes, sizes, and colors and textures (of both skin and flesh). Fruits may be globose, oblong or elongate, cylindrical, or even flattened, and some forms have crooked or elongated necks. They range from the size of a plum to the pumpkin weighing 821.23 kg (1,810 lb 8 oz), recorded as the world’s largest in 2010. Skin colors vary from white to cream to yellow to orange to green; some cultivars have variegated fruits. The surface of the fruit may be smooth, scalloped, ridged, or warty; in C. pepo, the skin is thin and edible, whereas in C. maxima, the skins are thicker and harder, and are generally not eaten.
The flesh of the fruits is cooked and eaten as a vegetable, or made into purees, soups, or pies. Flowers are sometimes eaten. Seeds of C. maxima are high in protein and minerals, and are eaten raw, toasted, or pressed to make oil. In South and Central America, traditional medicinal uses of Cucurbita species seeds include as a vermifuge and antihelmintic (to kill worms and intestinal parasites), and to treat fevers, jaundice, and diabetes.
World production of pumpkins, squashes, and gourds in 2009 (of all species) was 22.1 million tons harvested from 1.7 million hectares, valued at $5.2 billion U.S. dollars. Leading producers were China, Russia, India, the U.S., and Egypt.
(Decker-Walters 1990, Encyclopedia Britannica 1993, FAOSTAT 2011, Guinnessworldrecords.com 2011, Schultes 1990, Whittaker and Davis 1962)
Herbaceous vines, annual, monoecious, creeping or climbing by axillary tendrils; stems sulcate, producing watery latex; tendrils axillary, with 2-5 branches. Leaves alternate, petiolate; blades subentire, rounded or deeply lobed; stipules absent. Flowers unisexual, actinomorphic, solitary, the staminate flowers also in axillary fascicles; calyx campanulate, rarely cylindrical, with (4-)5(-7) minute lobes; corolla campanulate, deeply lobed; stamens 3, the filaments fleshy, inserted at the base of the floral receptacle, the anthers linear, connate into a cylindrical column; ovary inferior, 3-5-locular, with numerous horizontal ovules, the style simple, short, with 3-5 stigmatic branches, bilobed or bifurcate. Fruit a fleshy, fibrous, or woody berry, large; seeds numerous, elliptical. A New World genus of about 30 species, some of which are widely cultivated for their edible fruits.
Foodplant / spot causer
numerous, crowded, blackish-brown, erumpent then very prominent pycnidium of Ascochyta coelomycetous anamorph of Ascochyta cucumeris causes spots on live epicarp of Cucurbita
Foodplant / pathogen
colony of Erwinia carotovora infects and damages fruit of Cucurbita
Molecular Biology and Genetics
Statistics of barcoding coverage
Specimens with Sequences:85
Specimens with Barcodes:72
Species With Barcodes:26
Relevance to Humans and Ecosystems
Leaf: Infusion used to treat stomachache.
Flower: Pumpkin flowers boiled in water, with a little salt added after boiling, are used as a remedy for thrush. For jaundice, an infusion is made and a few camomile flowers are added to the drink, after which a dose of castor oil is taken.
Cucurbita (Latin for gourd) is a genus of herbaceous vine in the gourd family Cucurbitaceae, also known as cucurbits, native to the Andes and Mesoamerica. Five species are grown worldwide for their edible fruit, variously known as squash, pumpkin, or gourd depending on species, variety, and local parlance,[a] and seeds. First cultivated in the Americas before being brought to Europe after the discovery of the New World, plants in the genus Cucurbita are important sources of human food, beverages, and oil. Other kinds of gourd, also called bottle-gourds, are native to Africa and belong to the genus Lagenaria, which is in the same family and subfamily as Cucurbita but in a different tribe. These gourds are used as utensils or vessels.
Most Cucurbita species are herbaceous vines that grow several meters in length and have tendrils, but non-vining "bush" cultivars of C. pepo and C. maxima have also been developed. The yellow or orange flowers on a Cucurbita plant are of two types: female and male. The female flowers produce the fruit and the male flowers produce pollen. Many North and Central American species are visited by specialist bee pollinators, but other insects with more general feeding habits such as honey bees also visit. The fruits of the Cucurbita genus are good sources of several nutrients such as vitamin A, vitamin C, niacin, folic acid, and iron, and like all plant products are free of cholesterol. The plants contain the toxins cucurbitin, cucurmosin, and cucurbitacin. There is some disagreement about how to handle the taxonomy of the genus; the number of species accepted by different specialists varies from 13 to 30. In addition, the ancestry of some of the species that have been cultivated for millennia is uncertain. The five domesticated species are Cucurbita argyrosperma, C. ficifolia, C. maxima, C. moschata, and C. pepo. All of these can be treated as winter squash because the full-grown fruits can be stored for months; however, C. pepo includes some cultivars that are better used only as summer squash.
Cucurbita fruits have played a role in human culture for at least 2,000 years. They are often represented in Moche ceramics from Peru. After Christopher Columbus's arrival in the New World, paintings of squashes started to appear in Europe early in the sixteenth century. Among other uses, extracts are used in cosmetics for dry and sensitive skin. The fruits have many culinary uses including pumpkin pie, biscuits, bread, desserts, puddings, and soups. Pumpkins and other Cucurbita fruits are celebrated in festivals and in flower and vegetable shows in many countries.
- 1 Description
- 2 Taxonomy
- 3 Reproductive biology
- 4 Distribution and habitat
- 5 History and domestication
- 6 Nutrients
- 7 Toxins
- 8 Pests and diseases
- 9 Human culture
- 10 See also
- 11 Notes
- 12 References
- 13 External links
Most Cucurbita species are climbing annual vines; they are also mesophytes, plants which require a more or less continuous water supply. The less numerous perennial species grow in tropical zones and are xerophytes, plants which tolerate dry conditions. Growing 5 to 15 meters (16 to 49 ft) in height or length, the plant stem produces tendrils to help it climb adjacent plants and structures or extend along the ground. Most species do not readily root from the nodes; a notable exception is C. ficifolia, and the four other cultivated mesophytes do this to a lesser extent. The vine of the perennial Cucurbita can become semiwoody if left to grow. There is wide variation in size, shape, and color among Cucurbita fruits, and even within a single species. C. ficifolia is an exception, being highly uniform in appearance. The morphological variation in the species C. pepo and C. maxima is so vast that its various subspecies and cultivars have been misidentified as totally separate species.
The typical cultivated Cucurbita species has five-lobed or palmately divided leaves with long petioles, with the leaves alternately arranged on the stem. The stems in some species are angular. All of the above-ground parts may be hairy with various types of trichomes, which are often hardened and sharp. Spring-like tendrils grow from each node and are branching in some species. C. argyrosperma has ovate-cordate (egg-shaped to heart-shaped) leaves. The shape of C. pepo leaves varies widely. C. moschata plants can have light or dense pubescence. C. ficifolia leaves are slightly angular and have light pubescence. The leaves of all four of these species may or may not have white spots.
There are male (staminate) and female (pistillate) flowers (unisexual flowers) on a single plant (monoecious), and these grow singly, appearing from the leaf axils. Flowers have five fused yellow to orange petals (the corolla) and a green bell-shaped calyx. Male flowers in Cucurbitaceae generally have five stamens, but in Cucurbita there are only three, and their anthers are joined together so that there appears to be one. Female flowers have thick pedicels, and an inferior ovary with 3–5 stigmas that each have two lobes. The female flowers of C. argyrosperma and C. ficifolia have larger corollas than the male flowers. Female flowers of C. pepo have a small calyx, but the calyx of C. moschata male flowers is comparatively short.
Cucurbita fruits are large and fleshy. Botanists classify the Cucurbita fruit as a pepo, which is a special type of berry derived from an inferior ovary, with a thick outer wall or rind with hypanthium tissue forming an exocarp around the ovary, and a fleshy interior composed of mesocarp and endocarp. The term "pepo" is used primarily for Cucurbitaceae fruits, where this fruit type is common, but the fruits of Passiflora and Carica are sometimes also considered pepos. The seeds, which are attached to the ovary wall (parietal placentation) and not to the center, are large and fairly flat with a large embryo that consists almost entirely of two cotyledons. Fruit size varies considerably: wild fruit specimens can be as small as 4 centimeters (1.6 in) and some domesticated specimens can weigh well over 300 kilograms (660 lb). The current world record was set in October 2014 by John Hawkley of Napa County, California with a 933.5-kilogram (2,058 lb) pumpkin.
Cucurbita was formally described in a way that meets the requirements of modern botanical nomenclature by Linnaeus in his Genera Plantarum, the fifth edition of 1754 in conjunction with the 1753 first edition of Species Plantarum. Cucurbita pepo is the type species of the genus. Linnaeus initially included the species C. pepo, C. verrucosa and C. melopepo (both now included in C. pepo), as well as C. citrullus (watermelon, now Citrullus lanatus) and C. lagenaria (now Lagenaria siceraria) (both are not Cucurbita but are in the family Cucurbitaceae.
The Cucurbita digitata, C. foetidissima, C. galeotti, and C. pedatifolia species groups are xerophytes, arid zone perennials with storage roots; the remainder, including the five domesticated species, are all mesophytic annuals or short-life perennials with no storage roots. The five domesticated species are mostly isolated from each other by sterility barriers and have different physiological characteristics. Some cross pollinations can occur: C. pepo with C. argyrosperma and C. moschata; and C. maxima with C. moschata. Cross pollination does occur readily within the family Cucurbitaceae. The buffalo gourd (C. foetidissima), which does not taste good, has been used as an intermediary as it can be crossed with all the common Cucurbita.
Various taxonomic treatments have been proposed for Cucurbita, ranging from 13–30 species. In 1990, cucurbita expert Michael Nee classified them into the following oft-cited 13 species groups (27 species total), listed by group and alphabetically, with geographic origin:
- C. argyrosperma (synonym C. mixta) – cushaw pumpkin; origin: Panama, Mexico
- C. digitata – fingerleaf gourd; origin: southwestern United States (USA), northwestern Mexico
- C. ecuadorensis, origin: Ecuador's Pacific coast
- C. ficifolia – figleaf gourd, chilacayote; origin: Mexico, Panama, northern Chile and Argentina
- C. foetidissima – stinking gourd, buffalo gourd; origin: Mexico
- C. galeottii is little known; origin: Oaxaca, Mexico
- C. lundelliana, origin: Mexico, Guatemala, Belize
- C. maxima – winter squash, pumpkin; origin: Argentina, Bolivia, Ecuador
- C. andreana, origin – Argentina
- C. moschata – butternut squash, 'Dickinson' pumpkin, golden cushaw; origin: Bolivia, Colombia, Ecuador, Mexico, Panama, Puerto Rico, Venezuela
- C. okeechobeensis, origin: Florida
- C. martinezii, origin: Mexican Gulf Coast and foothills
- C. pedatifolia, origin: Querétaro, Mexico
- C. pepo – field pumpkin, summer squash, zucchini, vegetable marrow, courgette, acorn squash; origin: Mexico, USA
- C. radicans – calabacilla, calabaza de coyote; origin: Central Mexico
The taxonomy by Nee closely matches the species groupings reported in a pair of studies by a botanical team led by Rhodes and Bemis in 1968 and 1970 based on statistical groupings of several phenotypic traits of 21 species. Seeds for studying additional species members were not available. Sixteen of the 21 species were grouped into five clusters with the remaining five being classified separately:
- C. digitata, C. palmata, C. californica, C. cylindrata, C. cordata
- C. martinezii, C. okeechobeensis, C. lundelliana
- C. sororia, C. gracilior, C. palmeri; C. argyrosperma (reported as C. mixta) was considered close to the three previous species
- C. maxima, C. andreana
- C. pepo, C. texana
- C. moschata, C. ficifolia, C. pedatifolia, C. foetidissima, and C. ecuadorensis were placed in their own four separate species groups as they were not considered significantly close to any of the other species studied.
The full phylogeny of this genus is unknown, and research is ongoing in 2014. The following cladogram of Cucurbita phylogeny is based upon a 2002 study of mitochondrial DNA by Sanjur and colleagues.
All species of Cucurbita have 20 pairs of chromosomes. Many North and Central American species are visited by specialist pollinators in the apid tribe Eucerini, especially the genera Peponapis and Xenoglossa, and these squash bees can be crucial to the flowers producing fruit after pollination.
When there is more pollen applied to the stigma, more seeds are produced in the fruits and the fruits are larger with greater likelihood of maturation, an effect called xenia. Competitively grown specimens are therefore often hand-pollinated to maximize the number of seeds in the fruit, which increases the fruit size; this pollination requires skilled technique. Seedlessness is known to occur in certain cultivars of C. pepo.
The most critical factors in flowering and fruit set are physiological, having to do with the age of the plant and whether it already has developing fruit. The plant hormones ethylene and auxin are key in fruit set and development. Ethylene promotes the production of female flowers. When a plant already has a fruit developing, subsequent female flowers on the plant are less likely to mature, a phenomenon called "first-fruit dominance", and male flowers are more frequent, an effect that appears due to reduced natural ethylene production within the plant stem. Ethephon, a plant growth regulator product that is converted to ethylene after metabolism by the plant, can be used to increase fruit and seed production.
The plant hormone gibberellin, produced in the stamens, is essential for the development of all parts of the male flowers. The development of female flowers is not yet understood. Gibberellin is also involved in other developmental processes of plants such as seed and stem growth.
Germination and seedling growth
Seeds with maximum germination potential develop (in C. moschata) by 45 days after anthesis, and seed weight reaches its maximum 70 days after anthesis. Some varieties of C. pepo germinate best with eight hours of sunlight daily and a planting depth of 1.2 centimeters (0.47 in). Seeds planted deeper than 12.5 centimeters (4.9 in) are not likely to germinate. In C. foetidissima, a weedy species, plants younger than 19 days old are not able to sprout from the roots after removing the shoots. In a seed batch with 90 percent germination rate, over 90 percent of the plants had sprouted after 29 days from planting.
Experiments have shown that when more pollen is applied to the stigma, as well as the fruit containing more seeds and being larger (the xenia effect mentioned above), the germination of the seeds is also faster and more likely, and the seedlings are larger. Various combinations of mineral nutrients and light have a significant effect during the various stages of plant growth. These effects vary significantly between the different species of Cucurbita. A type of stored phosphorus called phytate forms in seed tissues as spherical crystalline intrusions in protein bodies called globoids. Along with other nutrients, phytate is used completely during seedling growth. Heavy metal contamination, including cadmium, has a significant negative impact on plant growth. Cucurbita plants grown in the spring tend to grow larger than those grown in the autumn.
Distribution and habitat
Archaeological investigations have found evidence of domestication of Cucurbita going back over 8,000 years from the very southern parts of Canada down to Argentina and Chile. Centers of domestication stretch from the Mississippi River watershed and Texas down through Mexico and Central America to northern and western South America. Of the 27 species that Nee delineates, five are domesticated. Four of them, C. argyrosperma, C. ficifolia, C. moschata, and C. pepo, originated and were domesticated in Mesoamerica; for the fifth, C. maxima, these events occurred in South America.
Within C. pepo, the pumpkins, the scallops, and possibly the crooknecks are ancient and were domesticated at different times and places. The domesticated forms of C. pepo have larger fruits than non-domesticated forms and seeds that are bigger but fewer in number. In a 1989 study on the origins and development of C. pepo, botanist Harry Paris suggested that the original wild specimen had a small round fruit and that the modern pumpkin is its direct descendant. He suggested that the crookneck, ornamental gourd, and scallop are early variants and that the acorn is a cross between the scallop and the pumpkin.
C. argyrosperma is not as widespread as the other species. The wild form C. a. subsp. sororia is found from Mexico to Nicaragua, and cultivated forms are used in a somewhat wider area stretching from Panama to the southeastern United States. It was probably bred for its seeds, which are large and high in oil and protein, but its flesh is of poorer quality than that of C. moschata and C. pepo. It is grown in a wide altitudinal range: from sea level to as high as 1,800 meters (5,900 ft) in dry areas, usually with the use of irrigation, or in areas with a defined rainy season, where seeds are sown in May and June.
C. ficifolia and C. moschata were originally thought to be Asiatic in origin, but this has been disproven. The origin of C. ficifolia is Latin America, most likely southern Mexico, Central America, or the Andes. It grows at altitudes ranging from 1,000 meters (3,300 ft) to 3,000 meters (9,800 ft) in areas with heavy rainfall. It does not hybridize well with the other cultivated species as it has significantly different enzymes and chromosomes.
C. maxima originated in South America over 4,000 years ago, probably in Argentina and Uruguay. The plants are sensitive to frost, and they prefer both bright sunlight and soil with a pH of 6.0 to 7.0. C. maxima did not start to spread into North America until after the arrival of Columbus. Varieties were in use by native peoples of the United States by the 16th century. Types of C. maxima include triloba, zapallito, zipinka, Banana, Delicious, Hubbard, Marrow (C. maxima Marrow), Show, and Turban.
C. moschata is native to Latin America, but the precise location of origin is uncertain. It has been present in Mexico, Belize, Guatemala, and Peru for 4,000–6,000 years and has spread to Bolivia, Ecuador, Panama, Puerto Rico, and Venezuela. This species is closely related to C. argyrosperma. A variety known as the Seminole Pumpkin has been cultivated in Florida since before the arrival of Columbus. Its leaves are 20 to 30 centimeters (8 to 12 in) wide. It generally grows at low altitudes in hot climates with heavy rainfall, but some varieties have been found above 2,200 meters (7,200 ft). Groups of C. moschata include Cheese, Crookneck (C. moschata), and Bell.
C. pepo is one of the oldest, if not the oldest, domesticated species with the oldest known locations being Oaxaca, Mexico, 8,000–10,000 years ago, and Ocampo, Tamaulipas, Mexico, about 7,000 years ago. It is known to have appeared in Missouri, United States, at least 4,000 years ago. Debates about the origin of C. pepo have been on-going since at least 1857. There have traditionally been two opposing theories about its origin: 1) that it is a direct descendant of C. texana and 2) that C. texana is merely feral C. pepo. A more recent theory by botanist Thomas Andres in 1987 is that descendants of C. fraterna hybridized with C. texana, resulting in two distinct domestication events in two different areas: one in Mexico and one in the eastern United States, with C. fraterna and C. texana, respectively, as the ancestral species. C. pepo may have appeared in the Old World before moving from Mexico into South America. It is found from sea level to slightly above 2,000 meters (6,600 ft). Leaves have 3–5 lobes and are 20–35 centimeters (8–14 in) wide. All the subspecies, varieties, and cultivars are interfertile. In 1986 Paris proposed a revised taxonomy of the edible cultivated C. pepo based primarily on the shape of the fruit, with eight groups . All but a few C. pepo cultivars can be included in these groups. There is one non-edible cultivated variety: C. pepo var. ovifera.
|Cultivar group||Botanical name||Image||Description|
|Acorn||C. pepo var. turbinata||Winter squash, both a shrubby and creeping plant, obovoid or conical shape, pointed at the apex and with longitudinal grooves, thus resembling a spinning top, ex: Acorn squash|
|Cocozzelle||C. pepo var. Ionga||Summer squash, long round slender fruit that is slightly bulbous at the apex, similar to fastigata, ex: Cocozelle von tripolis|
|Crookneck||C. pepo var. torticollia (also torticollis)||Summer squash, shrubby plant, with yellow, golden, or white fruit which is long and curved at the end and generally has a verrucose (wart-covered) rind, ex: Crookneck squash|
|Pumpkin||C. pepo var. pepo||Winter squash, creeping plant, round, oblate, or oval shape and round or flat on the ends, ex: Pumpkin; includes C. pepo subsp. pepo var. styriaca, used for Styrian pumpkin seed oil|
|Scallop||C. pepo var. clypeata; called C. melopepo by Linnaeus||Summer squash, prefers half-shrubby habitat, flattened or slightly discoidal shape, with undulations or equatorial edges, ex: Pattypan squash|
|Straightneck||C. pepo var. recticollis||Summer squash, shrubby plant, with yellow or golden fruit and verrucose rind, similar to var. torticollia but a stem end that narrows, ex: Straightneck squash|
|Vegetable marrow||C. pepo var. fastigata||Summer and winter squashes, creeper traits and a semi-shrub, cream to dark green color, short round fruit with a slightly broad apex, ex: Spaghetti squash (a winter variety)|
|Zucchini/Courgette||C. pepo var. cylindrica||Summer squash, presently the most common group of cultivars, origin is recent (19th century), semi-shrubby, cylindrical fruit with a mostly consistent diameter, similar to fastigata, ex: Zucchini|
|Ornamental gourds||C. pepo var. ovifera||Non-edible, field squash closely related to C. texana, vine habitat, thin stems, small leaves, three sub-groups: C. pepo var. ovifera (egg-shaped, pear-shaped), C. pepo var. aurantia (orange color), and C. pepo var. verrucosa (round warty gourds), ornamental gourds found in Texas and called var. texana and ornamental gourds found outside of Texas (Illinois, Missouri, Arkansas, Oklahoma, and Louisiana) are called var. ozarkana.|
History and domestication
The ancestral species of the genus Cucurbita were present in the Americas before the arrival of humans, and are native to the New World. The likely center of origin is southern Mexico, spreading south through what is now known as Mesoamerica, on into South America, and north to what is now the southwestern United States. Evolutionarily speaking, the genus is relatively recent in origin, dating back only to the Holocene, whereas the Cucurbitaceae family, in the shape of seeds similar to Bryonia, dates to the Paleocene. No species within the genus is entirely genetically isolated. C. moschata can intercross with all the others, though the hybrid offspring may not themselves be fertile unless they become polyploid. The genus was part of the culture of almost every native peoples group from southern South America to southern Canada. Modern-day cultivated Cucurbita are not found in the wild. Genetic studies of the mitochondrial gene nad1 show there were at least six independent domestication events of Cucurbita separating domestic species from their wild ancestors. Species native to North America include C. digitata (calabazilla), and C. foetidissima (buffalo gourd), C. palmata (coyote melon), and C. pepo. Some species, such as C. digitata and C. ficifolia, are referred to as gourds. Gourds, also called bottle-gourds, which are used as utensils or vessels, belong to the genus Lagenaria and are native to Africa. Lagenaria are in the same family and subfamily as Cucurbita but in a different tribe.
The earliest known evidence of the domestication of Cucurbita dates back at least 8,000 years ago, predating the domestication of other crops such as maize and beans in the region by about 4,000 years. This evidence was found in the Guilá Naquitz cave in Oaxaca, Mexico, during a series of excavations in the 1960s and 1970s, possibly beginning in 1959. Solid evidence of domesticated C. pepo was found in the Guilá Naquitz cave in the form of increasing rind thickness and larger peduncles in the newer stratification layers of the cave. By c. 8,000 years BP the C. pepo peduncles found are consistently more than 10 millimeters (0.39 in) thick. Wild Cucurbita peduncles are always below this 10 mm barrier. Changes in fruit shape and color indicate that intentional breeding of C. pepo had occurred by no later than 8,000 years BP. During the same time frame, average rind thickness increased from 0.84 millimeters (0.033 in) to 1.15 millimeters (0.045 in).
Squash was domesticated first, followed by maize and then beans, becoming part of the Three Sisters agricultural system of companion planting. The English word "squash" derives from askutasquash (a green thing eaten raw), a word from the Narragansett language, which was documented by Roger Williams, the founder of Rhode Island, in his 1643 publication A Key Into the Language of America. Similar words for squash exist in related languages of the Algonquian family.
The family Cucurbitaceae has many species used as human food. Cucurbita is one of the most important of those, with the various species being prepared and eaten in many ways. Although the stems and skins tend to be more bitter than the flesh, the fruits and seeds of cultivated varieties are quite edible and need little or no preparation. The flowers and young leaves and shoot tips can also be consumed. The seeds and fruits of most varieties can be stored for long periods of time, particularly the sweet-tasting winter varieties with their thick, inedible skins. Summer squash have a thin, edible skin. The seeds of both types can be roasted, eaten raw, made into pumpkin seed oil, ground into a flour or meal, or otherwise prepared.
Squashes are primarily grown for the fresh food market. The Food and Agriculture Organization of the United Nations (FAO) reported that the ranking of the top five squash-producing countries was stable from 2005–2009. Those countries are: China, India, Russia, the United States, and Egypt. By 2012, Iran had moved into the 5th slot, with Egypt falling to 6th. The top 10 countries in terms of metric tons of squashes produced are:
|Top 10 total||15,663,449|
The only additional countries that rank in the top 20 where squashes are native are Cuba, which ranks 14th with 347,082 metric tons, and Argentina, which ranks 17th, with 326,900 metric tons. In addition to being the 4th largest producer of squashes in the world, the United States is the world's largest importer of squashes, importing 271,614 metric tons in 2011, 95 percent of that from Mexico. Within the United States, the states producing the largest amounts are Florida, New York, California, and North Carolina.
This is how Cucurbita compares to several other major Cucurbitaceae crops in terms of crop tonnage harvested:
|Top 10 total||49,075,599|
|Top 10 total||73,490,835|
|Nutritional value per 100 g (3.5 oz)|
|Energy||69 kJ (16 kcal)|
|Dietary fiber||1.1 g|
|Vitamin A equiv.|
|Percentages are roughly approximated using US recommendations for adults.|
Source: USDA Nutrient Database
Cucurbita have phytochemical constituents such as alkaloids, flavonoids, and palmitic, plus oleic and linoleic acids. Animal and in vitro experiments suggest that pumpkins have anti-diabetic, antioxidant, anticarcinogenic, and anti-inflammatory pharmacological properties. Pumpkin seeds have high levels of crude protein, calcium, iron, potassium, phosphorus, magnesium, zinc, and beta-carotene. Cucurbita are good sources of vitamin A, vitamin C, potassium, dietary fiber, niacin, folic acid, and iron. They are free of cholesterol.
Cucurbitin is an amino acid and a carboxypyrrolidine that is found in raw Cucurbita seeds. Cucurbitin is an inhibitor of histidine decarboxylase, which is associated with inhibition of the biosynthesis of histamine, which in turn is responsible for the formation of the inflammatory response. Cucurbitin causes degenerative changes in the reproductive organs of parasitic flukes.
Cucurbitacin is a plant steroid present in wild Cucurbita and in each member of the Cucurbitaceae family. Poisonous to mammals, it is found in quantities sufficient to discourage herbivores. It makes wild Cucurbita and most ornamental gourds, with the exception of an occasional C. fraterna and C. sororia, bitter to taste. Ingesting too much cucurbitacin can cause stomach cramps, diarrhea and even collapse. This bitterness is especially prevalent in wild Cucurbita; in parts of Mexico the flesh of the fruits is rubbed on a woman's breast to wean children. While the process of domestication has largely removed the bitterness from cultivated varieties, there are occasional reports of cucurbitacin causing illness in humans. Cucurbitacin is also used as a lure in insect traps.
Pests and diseases
Cucurbita species are used as food plants by the larvae of some Lepidoptera species, including the Cabbage Moth (Mamestra brassicae), Hypercompe indecisa, and the Turnip Moth (Agrotis segetum). Cucurbita can be susceptible to the pest Bemisia argentifolii (silverleaf whitefly) as well as aphids (Aphididae), cucumber beetles (Acalymma vittatum and Diabrotica undecimpunctata howardi), squash bug (Anasa tristis), the squash vine borer (Melittia cucurbitae), and the twospotted spidermite (Tetranychus urticae). The squash bug causes major damage to plants because of its very toxic saliva. Cucurbits are susceptible to diseases such as bacterial wilt (Erwinia tracheiphila), anthracnose (Colletotrichum spp.), fusarium wilt (Fusarium spp.), phytophthora blight (Phytophthora spp. water molds), and powdery mildew (Erysiphe spp.). Defensive responses to viral, fungal, and bacterial leaf pathogens do not involve cucurbitacin.
Species in the genus Cucurbita are susceptible to some types of mosaic virus including: Cucumber mosaic virus (CMV), Papaya ringspot virus-cucurbit strain (PRSV), Squash mosaic virus (SqMV), Tobacco ringspot virus (TRSV), Watermelon mosaic virus (WMV), and Zucchini yellow mosaic virus (ZYMV). PRSV is the only one of these viruses that does not affect all cucurbits. SqMV and CMV are the most common viruses among cucurbits. Symptoms of these viruses show a high degree of similarity, which often results in laboratory investigation being needed to differentiate which one is affecting plants.
Art, music, and literature
Along with maize and beans, squash has been depicted in the art work of the native peoples of the Americas for at least 2,000 years. For example, cucurbits are often represented in Moche ceramics.
Though native to the western hemisphere, Cucurbita began to spread to other parts of the world after Christopher Columbus's arrival in the New World in 1492. Until recently, the earliest known depictions of this genus in Europe was of Cucurbita pepo in De Historia Stirpium Commentarii Insignes in 1542 by the German botanist Leonhart Fuchs, but in 1992, two paintings, one of C. pepo and one of C. maxima, painted between 1515 and 1518, were identified in festoons at Villa Farnesina in Rome. Also, in 2001 depictions of this genus were identified in Grandes Heures of Anne of Brittany (Les Grandes Heures d'Anne de Bretagne), a French devotional book, an illuminated manuscript created between 1503 and 1508. This book contains an illustration known as Quegourdes de turquie, which was identified by cucurbit specialists as C. pepo subsp. texana in 2006.
In 1952, Stanley Smith Master, using the pen name Edrich Siebert, wrote "The Marrow Song (Oh what a beauty!)" to a tune in 6/8 time. It became a popular hit in Australia in 1973, and was revived by the Wurzels in Britain on their 2003 album Cutler of the West. John Greenleaf Whittier wrote a poem entitled The Pumpkin in 1850. "The Great Pumpkin" is a fictional holiday figure in the comic strip Peanuts by Charles M. Schulz.
Cucurbita extracts are used in cosmetics for dry and sensitive skin. The fruit pulp of some species, such as C. foetidissima, can be used as a soap or detergent, and buffalo gourd oil, made from Cucurbita foetidissima, was also made into soap.
Cucurbita have been used in various cultures as folk remedies. Pumpkins have been used by Native Americans to treat intestinal worms and urinary ailments; this Native American remedy was adopted by American doctors in the early nineteen century as an anthelmintic for the expulsion of worms. Seeds of C. pepo were used in southeastern Europe to treat irritable bladder and benign prostatic hyperplasia. In Germany, pumpkin seed is approved for use by the Commission E, which assesses folk and herbal medicine, for irritated bladder conditions and micturition problems of prostatic hyperplasia stages 1 and 2, although the monograph published in 1985 noted a lack of pharmacological studies that could substantiate empirically found clinical activity. The FDA in the United States, on the other hand, banned the sale of all such non-prescription drugs for the treatment of prostate enlargement in 1990.
In China, C. moschata seeds were also used in traditional Chinese medicine for the treatment of the parasitic disease schistosomiasis and for the expulsion of tape worms. Studies on mice as well as clinical studies have been conducted in China since the late 1950s to assess the efficacy of such traditional treatments. It was found that a combination of pumpkin seed and areca nut extracts was effective in in the expulsion of Taenia spp. tapeworms in over 89% of cases.
Long before European contact, Cucurbita had been a major food source for the native peoples of the Americas, and the species became an important food for European settlers, including the Pilgrims, even featuring at the first Thanksgiving. Commercially made pumpkin pie mix is most often made from varieties of C. moschata; 'Libby's Select' uses the Select Dickinson Pumpkin variety of C. moschata for its canned pumpkin. Other foods that can be made using members of this genus include biscuits, bread, cheesecake, desserts, donuts, granola, ice cream, lasagna dishes, pancakes, pudding, pumpkin butter, salads, soups, and stuffing. The xerophytic species are proving useful in the search for nutritious foods that grow well in arid regions. C. ficifolia is used to make soft and mildly alcoholic drinks.
In India, squashes (ghia) are cooked with seafood such as prawns. In France, marrows (courge) are traditionally served as a gratin, sieved and cooked with butter, milk, and egg, and flavored with salt, pepper, and nutmeg. In Italy, zucchini and larger squashes are served in a variety of regional dishes, such as cocuzze alla puviredda cooked with olive oil, salt and herbs from Puglia; as torta di zucca from Liguria, or torta di zucca e riso from Emilia-Romagna, the squashes being made into a pie filling with butter, ricotta, parmesan, egg, and milk; and as a sauce for pasta in dishes like spaghetti alle zucchine from Sicily. In Japan, squashes such as small C. moschata pumpkins (kabocha) are eaten boiled with sesame sauce, fried as a tempura dish, or made into balls with sweet potato and mountain yam.
Cucurbita fruits including pumpkins and marrows are celebrated in festivals in countries such as Argentina, Bolivia, Britain, Canada, France, Germany, Italy, Japan, Peru, Portugal, Spain, Switzerland, and the United States. Argentina holds an annual nation-wide pumpkin festival Fiesta Nacional del Zapallo ("Squashes and Pumpkins National Festival"), in Ceres, Santa Fe, on the last day of which a Reina Nacional del Zapallo ("National Queen of the Pumpkin") is chosen. In Portugal the Festival da Abóbora de Lourinhã e Atalaia ("Squashes and Pumpkins Festival in Lourinhã and Atalaia") is held in Lourinhã city, called the Capital Nacional da Abóbora (the "National Capital of Squashes and Pumpkins"). Ludwigsburg, Germany annually hosts the world's largest pumpkin festival. In Britain a giant marrow (zucchini) weighing 54.3177 kilograms (119.750 lb) was displayed in the Harrogate Autumn Flower Show in 2012. In the USA, pumpkin chucking is practiced competitively, with machines such as trebuchets and air cannons designed to throw intact pumpkins as far as possible. The Keene Pumpkin Fest is held annually in New Hampshire; in 2013 it held the world record for the most jack-o-lanterns lit in one place, 30,581 on October 19, 2013.
Halloween is widely celebrated with jack-o-lanterns made of large orange pumpkins carved with ghoulish faces and illuminated from inside with candles. The pumpkins used for jack-o-lanterns are C. pepo, not to be confused with the ones typically used for pumpkin pie in the United States, which are C. moschata. Kew Gardens marked Halloween in 2013 with a display of pumpkins, including a towering pyramid made of many varieties of squash, in the Waterlily House during its "IncrEdibles" festival.
- List of gourds and squashes in the genus Cucurbita
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The common terms “pumpkin”, “squash”, “gourd”, “cushaw”, “ayote”, “zapallo”, “calabaza”, etc. are often applied indiscriminately to different cultivated species of the New World genus Cucurbita L. (Cucurbitaceae): C. pepo L., C. maxima Duchesne, C. moschata Duchesne, C. argyrosperma C. Huber and C. ficifolia Bouché.
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The fossil record of Cucurbitaceae and indeed of the order Cucurbitales is sparse.. The oldest fossils are seeds from the Uppermost Paleocene and Lower Eocene London Clay (65MA).. Bryonia-like seeds from fossil beda at Tambov, Western Siberia date to the Lower Sarmat, 15-13 MA ago. Subfossil records of Cucurbita pepo have been dated to 8,000-7,000 B.C. at Guila Naquitz..., those of C. moschata in the northern Peruvian Andes to up to 9,200 B.P.
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