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Grand Coulee onion

Bulbs

1–5+, not clustered on stout, primary rhizome, ovoid, 1–1.5 × 0.8–1.4 cm;

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

inner coats white, cells obscure, quadrate.

Leaves

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

blade solid, flat, broadly channeled, falcate, 10–35 cm × 1–3(–5) mm, margins entire.

Scape

persistent, solitary, erect, solid, terete, enlarged apically but distinctly constricted just proximal to inflorescence, 15–20 cm × 1.5–4 mm.

Umbel

persistent, erect, compact, 15–30-flowered, hemispheric to globose, bulbils unknown;

spathe bracts persistent, 3, 5–7-veined, ovate, ± equal, apex acute.

Flowers

± stellate, 7–8 mm;

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

stamens exserted;

anthers blue-gray;

pollen light blue to gray;

ovary crested;

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

style exserted, linear;

stigma capitate, unlobed;

pedicel 10–20 mm.

Seed

coat shining;

cells smooth.

2n

= 14.

Allium constrictum

Phenology Flowering May–Jul.
Habitat Shallow, lithosolic soils, often dry and sandy
Elevation 300–500 m (1000–1600 ft)
Distribution
from FNA
WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Allium constrictum is known only from Douglas, Grant, and Lincoln counties.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 26.
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. 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. douglasii var. constrictum
Name authority (Ownbey & Mingrone) P. M. Peterson: Syst. Bot. 13: 211. (1988)
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