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Allium fibrillum

Blue Mountain onion, Cuddy Mountain onion, fringe onion

Arizona onion, largeflower onion

Bulbs

1–5+, without cluster of basal bulbels, not clustered on stout primary rhizome, ± globose, 0.5–1.2 × 0.5–1 cm;

outer coats enclosing 1 or more bulbs, brownish, membranous, reticulate;

cells very fine, often obscure, narrow, ± transversely elongate, intricately contorted, without fibers;

inner coats white to pink, cells obscure, transversely elongate, intricately contorted.

1–5, without basal bulbels, ovoid, 1.5–2.5 × 1–2 cm;

outer coats enclosing 1 or more bulbs, brown, reticulate, cells usually coarse-meshed, open, fibrous;

inner coats whitish, cells vertically elongate and regular or obscure.

Leaves

usually persistent, withering from tip by anthesis, 2, basally sheathing, sheaths not extending much above soil surface;

blade solid, flat, ± falcate, linear, channeled, 7–24 cm × 0.5–3 mm, margins entire.

persistent, green at anthesis, 2, sheathing;

blade solid, channeled, semiterete, 8–20 cm × 1–3 mm, margins entire.

Scape

persistent, solitary, erect, solid, terete or slightly flattened to very narrowly winged, 3–15 cm × 0.5–2 mm.

persistent, solitary, erect, terete or ± 4-angled, 5–20 cm × 1–4 mm.

Umbel

persistent, erect, compact, 10–20-flowered, hemispheric to globose, bulbils unknown;

spathe bracts persistent, 2, 4–6-veined, ovate, ± equal, apex acuminate.

persistent, erect, compact to loose, 10–20-flowered, hemispheric to globose, bulbils unknown;

spathe bracts persistent, 2–3, 3–5-veined, ovate to lanceolate, ± equal, apex acute to short-acuminate.

Flowers

campanulate, 5–8 mm;

tepals erect, white with prominent greenish or pink midribs, lanceolate, ± equal, becoming papery in fruit, margins entire, apex obtuse to acuminate, ± involute at tip;

stamens included;

anthers yellow;

pollen yellow;

ovary crestless or obscurely crested;

processes 3, low, rounded, margins entire;

style linear, equaling stamens;

stigma capitate, unlobed;

pedicel 3–10 mm.

campanulate, 8–12 mm;

tepals spreading, pink with deeper pink or reddish midveins, lanceolate, ± equal, becoming papery in fruit, not investing capsule, margins entire, apex obtuse to acuminate, midrib scarcely thickened;

stamens included;

anthers yellow or purple;

pollen yellow;

ovary usually conspicuously crested;

processes 6, central, usually connate in pairs across septa, ± erect, flattened, triangular, to 2 mm, margins entire, mostly well developed in fruit;

style linear, equaling stamens;

stigma capitate, unlobed or obscurely lobed;

pedicel 5–20 mm.

Seed

coat dull or shining;

cells smooth.

coat shining;

cells smooth, without central papillae.

2n

= 14.

= 14.

Allium fibrillum

Allium macropetalum

Phenology Flowering May–Jul. Flowering late Mar–Jun.
Habitat Moist, shallow soils Desert plains and hills
Elevation 300–2600 m (1000–8500 ft) 300–2500 m (1000–8200 ft)
Distribution
from FNA
ID; MT; OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CO; NM; TX; UT
[WildflowerSearch map]
[BONAP county map]
Discussion

Allium fibrillum closely resembles A. madidum but does not have a cluster of basal bulbels.

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

Source FNA vol. 26, p. 266. FNA vol. 26.
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. 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
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. 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. collinum A. deserticola, A. reticulatum var. deserticola
Name authority M. E. Jones ex Abrams: in L. Abrams and R. S. Ferris, Ill. Fl. Pacific States 1: 393. (1923) Rydberg: Bull. Torrey Bot. Club 31: 401. (1904)
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