Allium acuminatum |
Allium stellatum |
|
---|---|---|
Hooker's onion, taper-tip onion |
autumn onion, prairie 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+, usually clustered, often short-rhizomatous at base, rhizome not stout or iris-like, ovoid, 2–4 × 1–2.5 cm; outer coats enclosing 1 or more bulbs, grayish or brownish, membranous, fibers parallel, few, or sometimes reticulate, cells obscure, finely meshed; inner coats whitish to pinkish, cells obscure, ± quadrate. |
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, 3–5, basally sheathing, sheaths never extending much above soil level; blade solid, flat, channeled, 14–35 cm × 1–5 mm, margins ± entire. |
Scape | persistent, solitary, erect, solid, terete, 10–35 cm × 1–3 mm. |
persistent, solitary, erect, or, if nodding at anthesis, becoming erect, solid, terete or ± 4-angled, particularly distally, 20–50 cm × 1–3.5 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, nodding, becoming erect, ± loose, 9–40-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2, 2–4-veined, lanceolate, ± equal, apex 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. |
stellate, 5–8 mm; tepals spreading, deep pink, elliptic-lanceolate, ± equal, withering in fruit, margins entire, apex acute, midribs not thickened; stamens exserted; anthers yellow; pollen yellow; ovary conspicuously crested; processes 6, distinct, flattened, ± triangular, margins entire or toothed; style exserted, linear, ± equaling stamens; stigma capitate, scarcely thickened, unlobed; pedicel 0–20 mm. |
Seed | coat dull or shining; cells minutely roughened. |
coat dull; cells minutely roughened. |
2n | = 14. |
= 14. |
Allium acuminatum |
Allium stellatum |
|
Phenology | Flowering Apr–Jul. | Flowering Jul–Oct. |
Habitat | Dry slopes and plains | Often on calcareous soils |
Elevation | 100–1500 m (300–4900 ft) | 300–2200 m (1000–7200 ft) |
Distribution |
AZ; CA; CO; ID; NV; OR; UT; WA; WY; BC
|
AR; IA; IL; KS; MI; MN; MO; ND; NE; OK; SD; TN; TX; WI; MB; ON; SK
|
Source | FNA vol. 26, p. 261. | FNA vol. 26. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Synonyms | A. acuminatum var. cuspidatum, A. cuspidatum | |
Name authority | Hooker: Fl. Bor.-Amer. 2: 184, plate 196. (1838) | Ker Gawler: Bot. Mag. 38: plate 1576. (1813) |
Web links |