Allium parvum |
Allium abramsii |
|
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dwarf onion, small onion |
Abrams' allium, Abrams' onion |
|
Bulbs | 1–5+, not clustered on stout primary rhizome, rhizomes absent, renewal bulbs formed within coats of parent bulb, ovoid to ± globose, 1–2 × 0.7–2 cm; outer coats enclosing 1 or more bulbs, gray to grayish brown, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers; inner coats white or pinkish, cells obscure, ± quadrate. |
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 | usually deciduous with scape, withering from tip at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat, ± falcate, 8–15 cm × 2–8 mm, margins entire. |
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 | usually forming abcission layer and deciduous with leaves after seeds mature, frequently breaking at this level after pressing, solitary, erect, solid, flattened, frequently ± winged distally, or, in smaller specimens, ± terete, 3–12 cm × 0.5–2 mm. |
persistent, solitary, erect, solid, terete, 6–15 cm × 1–3 mm. |
Umbel | persistent, erect, compact, 5–30-flowered, hemispheric to conic, bulbils unknown; spathe bracts persistent, 2, 12–14-veined, ovate, ± equal, apex acute to acuminate. |
persistent, erect, compact, 10–45-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2–3, 3–5-veined, lanceolate, ± equal, apex acuminate. |
Flowers | narrowly campanulate, 6–9 mm; tepals erect, ± spreading toward tips, white or tinged with pink, with broad, dark, reddish purple or brown midvein, oblong to elliptic, unequal, outer longer, wider than inner, becoming papery and investing capsule, not carinate in fruit, margins entire, apex obtuse to ± acute; stamens included; anthers purple or yellow; pollen yellow; ovary obscurely crested; processes 3, central, low, rounded, margins entire; style linear, ± equaling tepals; stigma capitate, scarcely thickened, unlobed or obscurely 3-lobed; pedicel 3–12 mm. |
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; cells smooth. |
coat dull or shining; cells minutely roughened. |
2n | = 14. |
= 14. |
Allium parvum |
Allium abramsii |
|
Phenology | Flowering late Apr–Jun. | Flowering May–Jul. |
Habitat | Rocky, clay slopes and talus | Granite sands in open coniferous forest |
Elevation | 1200–2800 m (3900–9200 ft) | 1400–2000 m (4600–6600 ft) |
Distribution |
CA; ID; NV; OR; UT
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CA |
Discussion | Allium abramsii is known only from the central Sierra Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 26. | FNA vol. 26. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Synonyms | A. modocense, A. pleianthum var. particolor, A. tribracteatum var. andersonii, A. tribracteatum var. parvum | A. fimbriatum var. abramsii |
Name authority | Kellogg: Proc. Calif. Acad. Sci. 3: 54, fig. 13. (1863) | (Ownbey & Aase ex Traub) McNeal: Aliso 13: 417. (1992) |
Web links |