Allium lacunosum S. Watson
Family: Amaryllidaceae
Pitted Onion
Allium lacunosum image
Steven Thorsted  

Bulbs 1-3(-5), not clustered on stout primary rhizome, ovoid, 1-2 × 1-2 cm; outer coats enclosing 1 or more bulbs, brown, prominently cellular-reticulate, membranous, accumulating and investing bulb with thick cover, cells square, polygonal, or ± transversely elongate, walls thick, sinuous, without fibers; inner coats white to light brown, cells ± obscure, quadrate. Leaves persistent, withering from tip at anthesis, 2-3, basally sheathing, sheaths not extending much above soil surface; blade solid, flattened, subterete or ± channeled and carinate, ± falcate, 10-30 cm × 0.5-3 mm, margins entire. Scape persistent, solitary, erect, solid, terete, 10-35 cm × 1-4 mm. Umbel persistent, erect, compact or loose, 5-45-flowered, bulbils unknown, umbel shattering after seeds mature, each flower deciduous with its pedicel; spathe bracts persistent, 2-3, 4-6-veined, lance-ovate to ovate, ± equal, apex obtuse or acuminate. Flowers campanulate, 4-9 mm; tepals erect or spreading from base, white to deep pink with darker midveins, lance-ovate to ovate, ± equal, margins entire, apex obtuse, acute, or short-acuminate; stamens included; anthers yellow; pollen yellow; ovary 3-grooved with ridge on either side of each groove, ridges prolonged into crest, ridges and crest densely covered with minute, rounded papillae; processes 3, central, 2-lobed, minute; style linear, equaling stamens; stigma capitate, scarcely thickened, obscurely 3-lobed; pedicel 4-30 mm. Seed coat dull or shining; cells minutely roughened.

Allium lacunosum image
Steven Thorsted  
Allium lacunosum image
Steven Thorsted  
Allium lacunosum image
Steven Thorsted  
Allium lacunosum image
Dianne Fristrom  
Allium lacunosum image
Keir Morse  
Allium lacunosum image
Keir Morse  
Allium lacunosum image
Keir Morse  
Allium lacunosum image
Keir Morse  
Allium lacunosum image
Keir Morse  
Allium lacunosum image
Keir Morse  
Allium lacunosum image
Steven Thorsted  
Allium lacunosum image
Steven Thorsted  
Allium lacunosum image
Steven Thorsted  
Allium lacunosum image
Steven Thorsted