Allium acuminatum |
Allium macropetalum |
|
---|---|---|
Hooker's onion, taper-tip onion |
Arizona onion, largeflower onion |
|
Bulbs | 1–12+, not basally clustered, not forming rhizomes, ovoid to ± globose, 0.8–1.6 × 0.9–1.6 cm; outer coats enclosing 1 or more renewal bulbs, ± yellow-brown, prominently cellular-reticulate, membranous, cells square or polygonal, walls thick, obscurely sinuous, without fibers; inner coats white, cells obscure, ± quadrate. |
1–5, without basal bulbels, ovoid, 1.5–2.5 × 1–2 cm; outer coats enclosing 1 or more bulbs, brown, reticulate, cells usually coarse-meshed, open, fibrous; inner coats whitish, cells vertically elongate and regular or obscure. |
Leaves | persistent, withering from tip by anthesis, 2–3, basally sheathing, sheaths not extending much above soil surface; blade solid, subterete or ± channeled, 7–30 cm × 1–3 mm, margins entire. |
persistent, green at anthesis, 2, sheathing; blade solid, channeled, semiterete, 8–20 cm × 1–3 mm, margins entire. |
Scape | persistent, solitary, erect, solid, terete, 10–35 cm × 1–3 mm. |
persistent, solitary, erect, terete or ± 4-angled, 5–20 cm × 1–4 mm. |
Umbel | persistent, erect, loose, 10–40-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2, 3–7-veined, lanceolate to ovate, ± equal, apex acuminate. |
persistent, erect, compact to loose, 10–20-flowered, hemispheric to globose, bulbils unknown; spathe bracts persistent, 2–3, 3–5-veined, ovate to lanceolate, ± equal, apex acute to short-acuminate. |
Flowers | campanulate, 8–15 mm; tepals erect, pink to rose-purple, or white, lanceolate to lance-ovate, unequal, becoming rigid and keeled in fruit, margins finely denticulate (inner tepal more prominently so), apex acuminate, outer tepal longer and wider than inner, spreading to recurved at tip, inner tepal with strongly recurved tips; stamens included; anthers yellow; pollen yellow; ovary crested; processes 3, central, 2-lobed, rounded, minute, margins entire; style linear, equaling stamens; stigma capitate, scarcely thickened, obscurely 3-lobed; pedicel 6–25 mm. |
campanulate, 8–12 mm; tepals spreading, pink with deeper pink or reddish midveins, lanceolate, ± equal, becoming papery in fruit, not investing capsule, margins entire, apex obtuse to acuminate, midrib scarcely thickened; stamens included; anthers yellow or purple; pollen yellow; ovary usually conspicuously crested; processes 6, central, usually connate in pairs across septa, ± erect, flattened, triangular, to 2 mm, margins entire, mostly well developed in fruit; style linear, equaling stamens; stigma capitate, unlobed or obscurely lobed; pedicel 5–20 mm. |
Seed | coat dull or shining; cells minutely roughened. |
coat shining; cells smooth, without central papillae. |
2n | = 14. |
= 14. |
Allium acuminatum |
Allium macropetalum |
|
Phenology | Flowering Apr–Jul. | Flowering late Mar–Jun. |
Habitat | Dry slopes and plains | Desert plains and hills |
Elevation | 100–1500 m (300–4900 ft) | 300–2500 m (1000–8200 ft) |
Distribution |
AZ; CA; CO; ID; NV; OR; UT; WA; WY; BC
|
AZ; CO; NM; TX; UT
|
Source | FNA vol. 26, p. 261. | FNA vol. 26. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Synonyms | A. acuminatum var. cuspidatum, A. cuspidatum | A. deserticola, A. reticulatum var. deserticola |
Name authority | Hooker: Fl. Bor.-Amer. 2: 184, plate 196. (1838) | Rydberg: Bull. Torrey Bot. Club 31: 401. (1904) |
Web links |