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Hooker's onion, taper-tip 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.

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.

Scape

persistent, solitary, erect, solid, terete, 10–35 cm × 1–3 mm.

Umbel

persistent, erect, loose, 10–40-flowered, hemispheric, bulbils unknown;

spathe bracts persistent, 2, 3–7-veined, lanceolate to ovate, ± 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.

Seed

coat dull or shining;

cells minutely roughened.

2n

= 14.

Allium acuminatum

Phenology Flowering Apr–Jul.
Habitat Dry slopes and plains
Elevation 100–1500 m (300–4900 ft)
Distribution
from FNA
AZ; CA; CO; ID; NV; OR; UT; WA; WY; BC
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 26, p. 261.
Parent taxa Liliaceae > Allium
Sibling taxa
A. aaseae, A. abramsii, A. ampeloprasum, A. amplectens, A. anceps, A. atrorubens, A. bigelovii, A. bisceptrum, A. bolanderi, A. brandegeei, A. brevistylum, A. burlewii, A. campanulatum, A. canadense, A. cepa, A. cernuum, A. columbianum, A. constrictum, A. coryi, A. cratericola, A. crenulatum, A. crispum, A. cuthbertii, A. denticulatum, A. diabolense, A. dichlamydeum, A. dictuon, A. douglasii, A. drummondii, A. elmendorfii, A. falcifolium, A. fibrillum, A. fimbriatum, A. fistulosum, A. geyeri, A. gooddingii, A. haematochiton, A. hickmanii, A. hoffmanii, A. howellii, A. hyalinum, A. jepsonii, A. kunthii, A. lacunosum, A. lemmonii, A. macropetalum, A. macrum, A. madidum, A. membranaceum, A. monticola, A. munzii, A. neapolitanum, A. nevadense, A. nevii, A. nigrum, A. obtusum, A. oleraceum, A. paniculatum, A. parishii, A. parryi, A. parvum, A. passeyi, A. peninsulare, A. perdulce, A. platycaule, A. plummerae, A. praecox, A. punctum, A. rhizomatum, A. robinsonii, A. rotundum, A. runyonii, A. sanbornii, A. sativum, A. schoenoprasum, A. scilloides, A. serra, A. sharsmithiae, A. shevockii, A. simillimum, A. siskiyouense, A. speculae, A. stellatum, A. textile, A. tolmiei, A. tribracteatum, A. tricoccum, A. triquetrum, A. tuberosum, A. tuolumnense, A. unifolium, A. validum, A. victorialis, A. vineale, A. yosemitense
Synonyms A. acuminatum var. cuspidatum, A. cuspidatum
Name authority Hooker: Fl. Bor.-Amer. 2: 184, plate 196. (1838)
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