Allium burlewii |
Allium acuminatum |
|
---|---|---|
Burlew's onion |
Hooker's onion, taper-tip onion |
|
Bulbs | usually solitary, not clustered on stout, primary rhizome, ovoid, 1.5–2.5 × 1–1.5 cm; outer coats enclosing single bulb, brown or grayish, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers; inner coats white, cells not visible. |
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. |
Leaves | usually deciduous with scape, withering from tip at anthesis, 1, basally sheathing, sheath not extending much above soil surface; blade solid, flat or broadly channeled, ± falcate, 8–33 cm × 1–10 mm, margins entire. |
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. |
Scape | usually forming abcission layer and deciduous with leaves after seeds mature, frequently breaking at this level after pressing, solitary, erect, solid, terete, 2–20 cm × 1–3 mm. |
persistent, solitary, erect, solid, terete, 10–35 cm × 1–3 mm. |
Umbel | persistent, erect, compact, 8–20(–30)-flowered, globose to conic, bulbils unknown; spathe bracts persistent, 3, 9–13-veined, broadly ovate, ± equal, apex abruptly acuminate. |
persistent, erect, loose, 10–40-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2, 3–7-veined, lanceolate to ovate, ± equal, apex acuminate. |
Flowers | conical to campanulate, 7–10 mm; tepals strictly erect, dull purplish with darker midveins, ovate, ± equal, becoming membranous, withering in fruit, margins entire, apex obtuse; stamens equaling tepals or ± exserted; filaments smooth proximally; anthers purple; pollen yellow or gray; ovary crestless or crested; processes 6, central, rounded, minute, margins entire; style linear, slightly longer than stamens; stigma capitate, scarcely thickened, unlobed; pedicel 6–10 mm. |
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. |
Seed | coat shining; cells smooth. |
coat dull or shining; cells minutely roughened. |
2n | = 14. |
= 14. |
Allium burlewii |
Allium acuminatum |
|
Phenology | Flowering late Apr–Jul. | Flowering Apr–Jul. |
Habitat | Granite sands, on dry slopes and ridges | Dry slopes and plains |
Elevation | 1800–2800 m (5900–9200 ft) | 100–1500 m (300–4900 ft) |
Distribution |
CA
|
AZ; CA; CO; ID; NV; OR; UT; WA; WY; BC
|
Source | FNA vol. 26, p. 273. | FNA vol. 26, p. 261. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. acuminatum var. cuspidatum, A. cuspidatum | |
Name authority | Davidson: Bull. S. Calif. Acad. Sci. 15: 17. (1916) | Hooker: Fl. Bor.-Amer. 2: 184, plate 196. (1838) |
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