Overview

Distribution

Calif. Allium abramsii is known only from the central Sierra Nevada.
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National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Physical Description

Morphology

Description

Bulbs 1–3, not clustered on stout, primary rhizome, ovoid to globose, 1–1.5 × 1–1.5 cm; outer coats enclosing 1 or more bulbs, gray to dark brown, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers; inner coats white, cells obscure, quadrate. Leaves persistent, withering from tip by anthesis, 1, basally sheathing, sheath not extending much above soil surface; blade solid, terete, 12–30 cm × 1–3.5 mm. Scape persistent, solitary, erect, solid, terete, 6–15 cm × 1–3 mm. Umbel persistent, erect, compact, 10–45-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2–3, 3–5-veined, lanceolate, ± equal, apex acuminate. Flowers campanulate to urceolate, 8–15 mm; tepals erect, rose-purple, linear to lanceolate, unequal, becoming rigid and ± keeled in fruit, apex acute, ± spreading-reflexed at tip, inner tepals slightly shorter and wider than outer, outer margins denticulate on distal 1/4, inner margins denticulate to erose and crisped throughout; stamens included; anthers yellow; pollen yellow; ovary crested; processes 6, prominent, ± triangular, margins entire; style linear, equaling stamens; stigma capitate, 3-lobed, lobes slender, recurved; pedicel 4–12 mm. Seed coat dull or shining; cells minutely roughened. 2n = 14.
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Diagnostic Description

Synonym

Allium fimbriatum S. Watson var. abramsii Ownbey & Aase ex Traub, Pl. Life 28: 64. 1972
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Type Information

Isotype for Allium fimbriatum var. abramsii Ownbey & Aase
Catalog Number: US 390487
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Preparation: Pressed specimen
Collector(s): H. M. Hall & H. P. Chandler
Year Collected: 1900
Locality: Pineridge., Fresno, California, United States, North America
Elevation (m): 1615 to 1615
  • Isotype: Ownbey, F. M. & Aase, H. C. 1972. Pl. Life. 28: 64.
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Ecology

Habitat

Granite sands in open coniferous forest; 1400--2000m.
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Life History and Behavior

Cyclicity

Flowering/Fruiting

Flowering May--Jul.
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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: N2 - Imperiled

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NatureServe Conservation Status

Rounded Global Status Rank: G2 - Imperiled

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Wikipedia

Allium abramsii

Allium abramsii is a species of wild onion known by the common name Abrams' onion.

Distribution

Allium abramsii is endemic to the central Sierra Nevada in California, where it grows in the coniferous forest understory in granite sand soils.

Description

This onion grows from one or more bulbs each just over a centimeter wide attached to a thick rhizome. It reaches a maximum height of about 15 centimeters with usually one curving cylindrical leaf. The inflorescence contains up to 40 pink or purplish flowers with lance-shaped tepals.

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