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three-corner leek, three-cornered leek, white flower onion

San Bernardino Mountain onion

Bulbs

5–20+, not clustered on stout primary rhizome, rhizomes absent, increase bulbs absent or ± equaling parent bulbs, never appearing as basal cluster, ovoid, 1–2 × 1–2 cm;

outer coats enclosing renewal bulbs, ± translucent, yellow-brown, obscurely cellular-reticulate, thin, membranous, meshes delicate, cells vertically elongate, contorted, without fibers;

inner coats white, cells obscure, quadrate, or not visible.

1–3+, generally with 1–2 stalked, basal bulbels, not clustered on stout, primary rhizome, ovoid, 1–2.2 × 1.2–2 cm;

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

inner coats white to pinkish, cells obscurely quadrate.

Leaves

persistent, green at anthesis, 2–3, basally sheathing, sheaths not extending much above soil surface;

blade solid, flat, not falcate, ± carinate, 15–50 cm × 3–15 mm, margins entire.

persistent, withering just at tip by anthesis, 1, basally sheathing, sheath not extending much above soil surface;

blade solid, terete, 9–35 cm × 2–4 mm.

Scape

persistent, clustered, 1–4, erect, solid, sharply 3-angled, 10–40 cm × 1–10 mm.

persistent, solitary, erect, solid, terete, 6–25 cm × 2–4 mm.

Umbel

persistent, lax, loose, 3–15-flowered, ± 1-sided, bulbils unknown;

spathe bracts persistent, 1–2, 3-veined, narrowly lanceolate, ± equal, apex acute.

persistent, erect, compact, 8–25-flowered, conic, bulbils unknown;

spathe bracts persistent, 2–3, 5–7-veined, broadly ovate, ± equal, apex acuminate.

Flowers

becoming pendent, campanulate, 10–18 mm;

tepals erect to spreading, white with prominent green midrib, lanceolate, ± equal, becoming membranous in fruit, margins entire, apex acute;

stamens included;

anthers yellow;

pollen yellow;

ovary crestless;

style linear, ± equaling stamens;

stigma capitate, scarcely thickened, unlobed;

pedicel 15–25 mm.

urceolate, 12–19 mm;

tepals erect, rose-purple distally, often white proximally, lance-linear to lance-ovate, ± equal, becoming rigid in fruit, margins entire, apex long-acuminate, flaring at tip;

stamens included;

anthers yellow;

pollen yellow;

ovary crested;

processes 6, ± prominent, ± triangular to ± linear, margins entire;

style linear, ± equaling stamens;

stigma capitate, scarcely thickened, unlobed;

pedicel 5–12 mm.

Seed(s)

coat dull;

cells minutely roughened.

coat dull;

cells minutely roughened.

2n

= 18.

= 14.

Allium triquetrum

Allium monticola

Phenology Flowering Mar–Apr. Flowering late May–Jul.
Habitat Disturbed sites Loose rock and talus slopes, alpine ridges and talus
Elevation 0–100 m (0–300 ft) 1400–3200 m (4600–10500 ft)
Distribution
from FNA
CA; sw Europe [Introduced in North America]
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Allium triquetrum is a garden escape, introduced from southwestern Europe, and is potentially a noxious weed.

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

Allium monticola is known only from the southern California mountains.

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

Source FNA vol. 26, p. 257. FNA vol. 26, p. 250.
Parent taxa Liliaceae > Allium 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. 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. tuberosum, A. tuolumnense, A. unifolium, A. validum, A. victorialis, A. vineale, A. yosemitense
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. 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. 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. monticola var. keckii, A. parishii var. keckii, A. peirsonii
Name authority Linnaeus: Sp. Pl. 1: 300. (1753) Davidson: Bull. S. Calif. Acad. Sci. 20: 51. (1921)
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