Allium macrum |
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rock onion |
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Bulbs | 1–3, not clustered on stout, primary rhizome, globose to ovate, 0.6–2 × 0.5–1.5 cm; outer coats enclosing 1 or more bulbs, brownish, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers; inner coats white, lacking cellular reticulation. |
Leaves | usually persistent, withering from tip at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat or channeled, ± falcate, 12–38 cm × 2–3 mm, margins entire. |
Scape | persistent, solitary, erect, solid, ± terete, not expanded proximal to inflorescence, 9–32 cm × 0.5–4 mm. |
Umbel | persistent, erect, loose, 10–20-flowered, globose, bulbils unknown; spathe bracts persistent, 2, 3–7-veined, lanceolate to lance-ovate, ± equal, apex abruptly acute. |
Flowers | campanulate, 5–7 mm; tepals spreading, white or pinkish with prominent red midveins, narrowly lanceolate, ± equal, becoming papery in fruit, margins entire, apex acuminate; stamens equaling tepals or exserted; anthers yellow; pollen yellow; ovary crested; processes 3, thick, obtuse, margins entire; style linear, equaling stamens; stigma capitate, scarcely thickened, unlobed; pedicel 5–20 mm. |
Seed | coat dull; cells ± smooth. |
2n | = 14. |
Allium macrum |
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Phenology | Flowering Apr–May. |
Habitat | Barren, gravelly soils |
Elevation | 100–1400 m (300–4600 ft) |
Distribution |
OR; WA
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Source | FNA vol. 26, p. 267. |
Parent taxa | Liliaceae > Allium |
Sibling taxa | |
Synonyms | A. equicaeleste |
Name authority | S. Watson: Proc. Amer. Acad. Arts 14: 233. (1879) |
Web links |