Allium perdulce |
Allium macropetalum |
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plains onion |
Arizona onion, largeflower onion |
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Bulbs | 2–20+, without basal bulbels, 1–2.5 × 1.2–2.8 cm; outer coats enclosing 1 or more bulbs, dark brown, reticulate, cells coarse-meshed, open, fibrous; inner coats whitish, cells regular, vertically elongate, walls not sinuous. |
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. |
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Leaves | persistent, green at anthesis, 3–5, sheathing; blade solid, flat, channeled, 8–30 cm × 1–2(–3) mm, margins entire. |
persistent, green at anthesis, 2, sheathing; blade solid, channeled, semiterete, 8–20 cm × 1–3 mm, margins entire. |
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Scape | persistent, solitary, erect, ± terete, 10–20 cm × 1–3 mm. |
persistent, solitary, erect, terete or ± 4-angled, 5–20 cm × 1–4 mm. |
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Umbel | persistent, erect, loose, 5–25-flowered, hemispheric-globose, bulbils unknown; spathe bracts persistent, 2–3, 3–7-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. |
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Flowers | urceolate, 7–10 mm; tepals erect, white or pale pink with deep pink midribs to deep rose, lanceolate, ± equal, becoming callous-keeled and permanently investing capsule, margins entire, apex obtuse or acute; stamens included; anthers yellow or purple; pollen yellow; ovary crestless; style linear, ± equaling stamens; stigma capitate, unlobed or obscurely lobed; pedicel 3–17 mm, ± 2 times perianth at anthesis, elongating in fruit. |
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. |
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Seed | coat dull or shining; cells minutely roughened. |
coat shining; cells smooth, without central papillae. |
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2n | = 14. |
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Allium perdulce |
Allium macropetalum |
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Phenology | Flowering late Mar–Jun. | |||||
Habitat | Desert plains and hills | |||||
Elevation | 300–2500 m (1000–8200 ft) | |||||
Distribution |
c North America
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AZ; CO; NM; TX; UT
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 26, p. 241. | FNA vol. 26. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | A. deserticola, A. reticulatum var. deserticola | |||||
Name authority | S. V. Fraser: Trans. Kansas Acad. Sci. 42: 124. (1940) | Rydberg: Bull. Torrey Bot. Club 31: 401. (1904) | ||||
Web links |