Allium lacunosum var. lacunosum |
Allium lacunosum |
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pitted onion |
pitted onion |
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Bulbs | 1–3(–5), not clustered on stout primary rhizome, ovoid, 1–2 × 1–2 cm; outer coats enclosing 1 or more bulbs, brown, prominently cellular-reticulate, membranous, accumulating and investing bulb with thick cover, cells square, polygonal, or ± transversely elongate, walls thick, sinuous, without fibers; inner coats white to light brown, cells ± obscure, quadrate. |
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Leaves | blade subterete to ± terete, arcuate, 1–2 times scape, 1–2 mm wide. |
persistent, withering from tip at anthesis, 2–3, basally sheathing, sheaths not extending much above soil surface; blade solid, flattened, subterete or ± channeled and carinate, ± falcate, 10–30 cm × 0.5–3 mm, margins entire. |
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Scape | 10–20 cm. |
persistent, solitary, erect, solid, terete, 10–35 cm × 1–4 mm. |
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Umbel | compact, 5–25-flowered; spathe bracts 2, apex acuminate. |
persistent, erect, compact or loose, 5–45-flowered, bulbils unknown, umbel shattering after seeds mature, each flower deciduous with its pedicel; spathe bracts persistent, 2–3, 4–6-veined, lance-ovate to ovate, ± equal, apex obtuse or acuminate. |
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Flowers | (6–)7–9 mm; tepals white with deep pink or purple midveins; pedicel 5–15 mm. |
campanulate, 4–9 mm; tepals erect or spreading from base, white to deep pink with darker midveins, lance-ovate to ovate, ± equal, margins entire, apex obtuse, acute, or short-acuminate; stamens included; anthers yellow; pollen yellow; ovary 3-grooved with ridge on either side of each groove, ridges prolonged into crest, ridges and crest densely covered with minute, rounded papillae; processes 3, central, 2-lobed, minute; style linear, equaling stamens; stigma capitate, scarcely thickened, obscurely 3-lobed; pedicel 4–30 mm. |
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Seed | coat dull or shining; cells minutely roughened. |
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2n | = 14. |
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Allium lacunosum var. lacunosum |
Allium lacunosum |
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Phenology | Flowering Apr–Jun. | |||||||||||||
Habitat | Apparently restricted to serpentine clays on ridges and peaks | |||||||||||||
Elevation | 300–1000 m (1000–3300 ft) | |||||||||||||
Distribution |
CA |
CA
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Discussion | Allium lacunosum var. lacunosum is known only from the central and south Coast Ranges, and on Santa Rosa and Santa Cruz islands. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 4 (4 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 26, p. 260. | FNA vol. 26, p. 260. | ||||||||||||
Parent taxa | ||||||||||||||
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Name authority | unknown | S. Watson: Proc. Amer. Acad. Arts 14: 231. (1879) | ||||||||||||
Web links |