Overview

Distribution

Frasera speciosa Douglas ex Griseb.:
United States (North America)
  • Munz, P. A. & D. D. Keck. 1959. Cal. Fl. 1–1681. University of California Press, Berkeley.   http://www.tropicos.org/Reference/1717 External link.
  • Cronquist, A. J., A. H. Holmgren, N. H. Holmgren, J. L. Reveal & P. K. Holmgren. 1984. Vascular Plants of the Intermountain West, U.S.A. 4: 1–573. In A. J. Cronquist, A. H. Holmgren, N. H. Holmgren, J. L. Reveal & P. K. Holmgren (eds.) Intermount. Fl. Hafner Pub. Co., New York.   http://www.tropicos.org/Reference/1695 External link.
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Swertia radiata (Kellogg) Kuntze:
United States (North America)
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National Distribution

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Type Information

Isotype for Frasera macrophylla Greene
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): C. F. Baker
Year Collected: 1899
Locality: Pagosa Springs., Archuleta, Colorado, United States, North America
  • Isotype: Greene, E. L. 1900. Pittonia. 4: 186.
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Ecology

General Ecology

This species is a long-lived perennial monocarp (flowers once and then dies). It is very common near the Rocky Mountain Biological Laboratory (9,500 feet elevation, Colorado), where the average height of flowering stalks is about 5 feet, with about 600 flowers. At lower altitudes stalks can reach 9 feet, and in the alpine tundra stalks can be less than a foot. Average age of flowering in an alpine population at 12,300 feet (near Cumberland Pass) is about 50 years. Flowers are visited by many kinds of insects, and hummingbirds, but most pollination is probably accomplished by bumble bees and moths.
  • Beattie, A., D. Breedlove, and P. Ehrlich. 1973. The ecology of the pollinators and predators of Frasera speciosa. Ecology 54:81-91.
  • Inouye, D. W. 1986. Long-term preformation of leaves and inflorescences by a long-lived perennial monocarp, Frasera speciosa, Gentianaceae. American Journal of Botany 73:1535-1540.
  • Inouye, D. W. and O. R. Taylor, Jr. 1980. Variation in generation time in Frasera speciosa (Gentianaceae), a long-lived perennial monocarp. Oecologia 47:171-174.
  • Taylor, O. R., Jr. and D. W. Inouye. 1985. Synchrony and periodicity of flowering in Frasera speciosa (Gentianaceae). Ecology 66:521-527.
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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G4 - Apparently Secure

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Wikipedia

Frasera speciosa

Frasera speciosa is a species of flowering plant in the gentian family known by the common names monument plant, elkweed, and deer's ears. It is native to the western United States, where it grows in mountain forests, woodlands, and meadows. It is a perennial herb growing from a woody base surrounded by rosettes of large leaves that measure up to 50 centimeters long by 15 wide. It produces a single erect stem which can reach two meters in height. The stem bears whorls of lance-shaped, pointed leaves smaller than those at the base. The plant is monocarpic, growing for several years and only flowering once before it dies.[1] Flowering is synchronized among plants in a given area, with widespread, picturesque blooms occurring periodically.[2] It is not known why some plants in an area will not flower in a mass flowering event, or what cues the plants rely on to initiate flowering. The inflorescence is a tall, erect panicle with flowers densely clustered at the top and then spread out in interrupted clusters below. Each flower has a calyx of four pointed sepals and a corolla of four pointed lobes each one to two centimeters long. The corolla is yellow-green with purple spots and each lobe has two fringed nectary pits at the base. There are four stamens tipped with large anthers and a central ovary.

References

  1. ^ Weid, A. and C. Galen. (1998). Plant parental care: Conspecific nurse effects in Frasera speciosa and Cirsium scopulorum. Ecology 79 1657–1668.
  2. ^ Taylor, O. R. and D. W. Inouye. (1985). Synchrony and periodicity of flowering in Frasera speciosa (Gentianaceae). Ecology 66 521–527.
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