Difference between revisions of "Allium obtusum"
Pittonia 2: 69. 1890.
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name=Allium obtusum | name=Allium obtusum | ||
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|publication title=Pittonia | |publication title=Pittonia | ||
|publication year=1890 | |publication year=1890 | ||
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|genus=Allium | |genus=Allium | ||
|species=Allium obtusum | |species=Allium obtusum | ||
Latest revision as of 22:15, 5 November 2020
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. 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. 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. 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. 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. Seed coat dull; cells ± smooth.
Distribution
Calif., Nev.
Discussion
Varieties 2 (2 in the flora).
Allium obtusum is known only from the Sierra Nevada.
Selected References
None.
Key
| 1 | Leaf blade 0.5–4 mm wide; umbels 6–20-flowered; tepals white with prominent, dark midveins, oblong-elliptic, apex obtuse. | Allium obtusum var. obtusum |
| 1 | Leaf blade 2–14 mm wide; umbels 10–65-flowered; tepals pink with darker midveins, lanceolate, apex acute. | Allium obtusum var. conspicuum |