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Overview

Distribution

Localities documented in Tropicos sources

Allium ampeloprasum var. porrum (L.) J. Gay:
Costa Rica (Mesoamerica)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
  • Grayum, M. H. 2003. Alliaceae. In: Manual de Plantas de Costa Rica, B.E. Hammel, M.H. Grayum, C. Herrera & N. Zamora (eds.). Monogr. Syst. Bot. Missouri Bot. Gard. 92: 43–45.   http://www.tropicos.org/Reference/1021917 External link.
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Localities documented in Tropicos sources

Allium porrum L.:
Guatemala (Mesoamerica)
Honduras (Mesoamerica)
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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National Distribution

United States

Origin: Exotic

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Morphology

Description

Plants c. 1 m tall. Bulb ovoid, 3-4 cm broad, scaly. Scape arising from the centre of the bulb. Leaves 6-12, linear, 1-2 cm broad, flat, keeled. Umbels globose, many flowered. Spathe long beaked. Tepals lanceolate, 4-5 mm long, white to light pink, each with a green vein, outer surface scabrid. Outer stamens as long as the tepals; filaments entire, linear; inner stamens longer than the tepals, filaments broader, tricuspidate, lateral cusps long, thread-like. Style included.
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Description

Bulb solitary, cylindric ovoid to subglobose, sometimes bearing bulbels; tunic white, membranous, entire. Leaves broadly linear to linear-lanceolate, shorter than scape, 1--5 cm wide or more, slightly conduplicate, abaxially keeled. Scape 60--80 cm or more, terete, covered with leaf sheaths for ca. 1/2 its length. Spathe 1-valved, deciduous; beak long. Umbel globose, densely many flowered. Pedicels subequal, several times as long as perianth, bracteolate. Perianth white to pale purple; segments with green midvein, suboblong, 4.5--5 × 2--2.3 mm, apex acute; outer ones denticulate along midvein abaxially. Filaments slightly longer than perianth segments, connate at base and adnate to perianth segments; outer ones narrowly triangular to linear-triangular, margin denticulate toward base; inner ones oblong, as wide as perianth segments for ca. 2/3 their length, 1-toothed on each side, teeth with apex elongated into a twisted, filiform cusp much longer than anther-bearing cusp. Ovary ovoid-globose, with transversely convex nectaries near middle of septa. Style exserted. Fl. and fr. May--Jul. 2 n = 32.
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Ecology

Habitat

Habitat & Distribution

Cultivated as a vegetable [native to SW Asia and Europe; also widely cultivated].
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Associations

Foodplant / parasite
telium of Uromyces ambiguus parasitises Allium ampeloprasum var. babingtonii

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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: NNA - Not Applicable

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NatureServe Conservation Status

Rounded Global Status Rank: GNR - Not Yet Ranked

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Management

These species are introduced in Switzerland.
  • Aeschimann, D. & C. Heitz. 2005. Synonymie-Index der Schweizer Flora und der angrenzenden Gebiete (SISF). 2te Auflage. Documenta Floristicae Helvetiae N° 2. Genève.   http://www.crsf.ch/ External link.
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Notes

Comments

Leek is cultivated as an annual in vegetable gardens in Guli Bagh, Swat and elsewhere; it has been found growing along field borders.
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