Allium rhizomatum |
Allium monticola |
|
---|---|---|
spreading wild onion |
San Bernardino Mountain onion |
|
Bulbs | solitary, not basally clustered, replaced annually by new bulbs borne terminally on rhizome; rhizomes 1–3, conspicuous, slender, 2–3 cm, scaly; parent bulbs persisting, often not collected, oblique-ovoid, 1–2.5 × 1 cm; outer coats enclosing parent bulbs, grayish, lacking cellular reticulation, membranous, without fibers; inner coats white or hyaline, cells obscure, ± quadrate. |
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, 20–35 cm × 2–3 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 | solitary, erect, solid, terete, 20–30 cm × 1–3 mm. |
persistent, solitary, erect, solid, terete, 6–25 cm × 2–4 mm. |
Umbel | persistent, erect, loose, 5–15(–22)-flowered, globose to hemispheric, bulbils unknown; spathe bracts persistent, 2, 3-veined, ovate to lance-ovate, ± 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 | stellate, 6–9 mm; tepals erect, pink with purplish or pinkish midveins, oblong to lanceolate, slightly carinate basally, ± equal, becoming papery in fruit, margins entire, apex acute to acuminate; stamens included; anthers yellow or pink; pollen yellow or white; ovary crestless, 3-grooved with thickened ridge on either side of groove; style linear, shorter than stamens; stigma capitate, scarcely thickened, unlobed; pedicel 10–20(–50) 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 | coat shining; cells smooth. |
coat dull; cells minutely roughened. |
2n | = 28. |
= 14. |
Allium rhizomatum |
Allium monticola |
|
Phenology | Flowering Jul–Sep. | Flowering late May–Jul. |
Habitat | Dry, usually grassy areas | Loose rock and talus slopes, alpine ridges and talus |
Elevation | 1200–2200 m (3900–7200 ft) | 1400–3200 m (4600–10500 ft) |
Distribution |
AZ; NM; TX; Mexico
|
CA
|
Discussion | Allium rhizomatum has often been included within the Mexican species A. glandulosum. This reduction is unwarranted. The perianth of A. rhizomatum is pale, with the color mainly confined to the midribs. Additionally, the species can be distinguished by its 3-lobed, apically 3-grooved ovary and lack of sepal glands. Allium glandulosum has a red perianth, an apically rounded ovary, and sepal glands. The nectar produced from these glands does not show in herbarium specimens. (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. | FNA vol. 26, p. 250. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Synonyms | A. monticola var. keckii, A. parishii var. keckii, A. peirsonii | |
Name authority | Wooton & Standley: Contr. U.S. Natl. Herb. 16: 114. (1913) | Davidson: Bull. S. Calif. Acad. Sci. 20: 51. (1921) |
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