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Douglas' onion

Bulbs

1–4, not clustered on stout, primary rhizomes, ovoid, 1.2–3 × 1–2 cm;

outer coats enclosing 1 or more bulbs, light brown, membranous, lacking cellular reticulation, or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers;

inner coats white, sometimes pink, cells obscure, quadrate or linear.

Leaves

usually persistent, green at anthesis, 2, basally sheathing, sheaths not extending much above soil surface;

blade solid, flat, falcate, 9–28 cm × (2–)5–15 mm, margins entire.

Scape

persistent, solitary, erect, solid, terete, not expanded proximal to inflorescence, (10–)20–30(–40) cm × 1–4 mm.

Umbel

persistent, erect, compact, 25–50-flowered, hemispheric to globose, bulbils unknown;

spathe bracts persistent, 3, 4–6-veined, ovate, ± equal, apex acute.

Flowers

± stellate, (6–)7–8(–10) mm;

tepals spreading, light pink to purple with prominent green midribs, narrowly lanceolate, ± equal, becoming papery in fruit, margins entire, apex acuminate;

stamens equaling tepals or exserted;

anthers blue-gray;

pollen white to light gray;

ovary crested;

processes 6, 2 per lobe, low, rounded, margins entire;

style exserted, linear;

stigma capitate, unlobed;

pedicel 15–30 mm.

Seed

coat shining;

cells smooth.

2n

= 14.

Allium douglasii

Phenology Flowering May–Jul.
Habitat Winter-wet, shallow soils on rock outcrops
Elevation 400–1300 m (1300–4300 ft)
Distribution
from FNA
OR; WA
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 26, p. 267.
Parent taxa Liliaceae > Allium
Sibling taxa
A. aaseae, A. abramsii, A. acuminatum, 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. 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. hendersonii
Name authority Hooker: Fl. Bor.-Amer. 2: 184, plate 197. (1838)
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