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short-style onion

Allium fibrillum

Blue Mountain onion, Cuddy Mountain onion, fringe onion

Bulbs

2–4, terminating thick, iris-like rhizome, elongate, 2–3 × 0.6–1 cm;

outer coats enclosing single bulb, grayish or brownish, membranous, minutely striate, cells in parallel vertical rows, narrow, elongate, not fibrous-reticulate, fibers persistent, parallel, few, coarse;

inner coats whitish, cells narrowly vertically elongate.

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.

Leaves

persistent, green at anthesis, 2–5, basally sheathing, sheaths not extending much above soil level;

blade solid, flat, 10–40 cm × 2–8 mm, margins entire.

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.

Scape

persistent, solitary, erect, solid, flattened and narrowly winged distally, 20–60 cm × 1.5–4 mm.

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

Umbel

persistent, erect, loose, 7–20-flowered, subhemispheric, bulbils unknown;

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

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

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

Flowers

narrowly urceolate, 10–13 mm;

tepals erect, pink, lanceolate, ± equal, withering in fruit, margins entire, apex acuminate, midribs somewhat thickened;

stamens included, ca. 1/2 as long as tepals;

anthers yellow;

pollen light yellow;

ovary crestless;

style linear, equaling stamens;

stigma capitate, distinctly 3-lobed;

pedicel 8–35 mm, elongating and becoming stout and curved in fruit.

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.

Seed

coat dull or shining;

cells each with minute, central papilla, or obscurely and minutely roughened.

coat dull or shining;

cells smooth.

2n

= 14.

= 14.

Allium brevistylum

Allium fibrillum

Phenology Flowering Jun–Aug. Flowering May–Jul.
Habitat Swampy meadows and along streams, rarely on wooded slopes Moist, shallow soils
Elevation 2200–3400 m (7200–11200 ft) 300–2600 m (1000–8500 ft)
Distribution
from FNA
CO; ID; MT; NM; UT; WY
[WildflowerSearch map]
[BONAP county map]
from FNA
ID; MT; OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Allium brevistylum is found only in the Rocky Mountains.

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

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. 246. FNA vol. 26, p. 266.
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. 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
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
Synonyms A. collinum
Name authority S. Watson: Botany (Fortieth Parallel), 350. (1871) M. E. Jones ex Abrams: in L. Abrams and R. S. Ferris, Ill. Fl. Pacific States 1: 393. (1923)
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