Allium macropetalum Rydb.  
Family: Amaryllidaceae
largeflower onion,  more...
Allium macropetalum image
Max Licher  
Bulbs 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 persistent, green at anthesis, 2, sheathing; blade solid, channeled, semiterete, 8-20 cm × 1-3 mm, margins entire. Scape persistent, solitary, erect, terete or ± 4-angled, 5-20 cm × 1-4 mm. Umbel 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, 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 shining; cells smooth, without central papillae. 2n = 14. Flowering late Mar--Jun. Desert plains and hills; 300--2500 m; Ariz., Colo., N.Mex., Utah, Tex.
Allium macropetalum image
Max Licher  
Allium macropetalum image
Max Licher  
Allium macropetalum image
Patrick Alexander  
Allium macropetalum image
Arizona State University Herbarium  
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