Allium obtusum |
Allium parvum |
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red Sierra onion, red Sierran onion |
dwarf onion, small onion |
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Bulbs | 1–5, not clustered on stout primary rhizome, ovoid, 1–2 × 0.8–1.8 cm; outer coats enclosing 1 or more bulbs, brown, membranous, cellular-reticulate, cells quadrate, polygonal, or ± rectangular, ± transversely elongate, without fibers; inner coats white, reticulation absent or cells obscure, ± quadrate. |
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. |
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Leaves | usually deciduous with scape, withering from tip at anthesis, 1–2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat or broadly channeled, ± falcate, 5–22 cm × 0.5–14 mm, margins entire. |
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. |
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Scape | usually forming abcission layer and deciduous with leaves after seeds mature, frequently breaking at this level after pressing, solitary, erect, solid, terete, 2–17 cm × 0.5–2 mm. |
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. |
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Umbel | persistent, erect, compact, 6–65-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2–3(–5), 5-8-veined, ovate, ± equal, apex abruptly acuminate to apiculate. |
persistent, erect, compact, 5–30-flowered, hemispheric to conic, bulbils unknown; spathe bracts persistent, 2, 12–14-veined, ovate, ± equal, apex acute to acuminate. |
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Flowers | campanulate, 4–12 mm; tepals erect, white or pink with dark purplish midveins, lanceolate to oblong-elliptic, ± equal, becoming papery in fruit, margins entire, apex obtuse to acute; stamens included; anthers yellow or purple; pollen yellow; ovary crested; processes 3, obscure to ± prominent, rounded, central, margins entire; style linear, equaling stamens or longer; stigma capitate, scarcely thickened, obscurely 3-lobed; pedicel 2–14(–20) mm. |
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. |
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Seed | coat dull; cells ± smooth. |
coat dull; cells smooth. |
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2n | = 14. |
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Allium obtusum |
Allium parvum |
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Phenology | Flowering late Apr–Jun. | |||||
Habitat | Rocky, clay slopes and talus | |||||
Elevation | 1200–2800 m (3900–9200 ft) | |||||
Distribution |
CA; NV
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CA; ID; NV; OR; UT
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Discussion | Varieties 2 (2 in the flora). Allium obtusum is known only from the Sierra Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 26, p. 269. | FNA vol. 26. | ||||
Parent taxa | Liliaceae > Allium | Liliaceae > Allium | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | A. modocense, A. pleianthum var. particolor, A. tribracteatum var. andersonii, A. tribracteatum var. parvum | |||||
Name authority | Lemmon: Pittonia 2: 69. (1890) | Kellogg: Proc. Calif. Acad. Sci. 3: 54, fig. 13. (1863) | ||||
Web links |