Log In
New Account
Sitemap
Home
Specimen Search
Search Collections
Map Search
Exsiccati Search
Images
Browse
Search
Flora Projects
State Inventories
Indiana
Ohio
Wisconsin
Aquatic Invasive Plant Guide
Interactive Tools
Dynamic Checklist
Dynamic Key
Crowdsource
Allium tribracteatum
Torr.
Family:
Amaryllidaceae
Three-Bract Onion
Steve Buckley
FNA
Resources
Dale W. McNeal Jr. & T. D. Jacobsen in Flora of North America (vol. 26)
Bulbs generally 2-5+, not clustered on stout primary rhizome, ovoid, 1-2 × 0.8-1.8 cm; outer coats enclosing 1 or more bulbs, brownish, membranous, prominently cellular-reticulate, cells irregularly arranged, ± transversely elongate, curved, without fibers; inner coats white, cells obscure, ± transversely elongate, irregularly arranged, curved. Leaves usually deciduous with scape, withering from tip at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat or broadly channeled, ± falcate, 12-20 cm × 1-3.5 mm, margins entire. Scape usually forming abcission layer and deciduous with leaves after seeds mature, frequently breaking at this level after pressing, solitary, erect, solid, terete, 2-7 cm × 0.5-1.5 mm. Umbel persistent, erect, compact, 10-30-flowered, hemispheric, bulbils unknown; spathe bracts persistent, (2-)3(-4), 4-5-veined, ovate, ± equal, apex abruptly acuminate to apiculate. Flowers campanulate, 6.5-8 mm; tepals erect, white to pink with dark pink or purplish midvein, lanceolate to ± elliptic, ± equal, becoming papery in fruit, margins entire, apex acute; stamens included; anthers purple; pollen gray; ovary crested; processes 3, acute, ± lateral, margins entire; style linear, shorter than stamens; stigma capitate, scarcely thickened, unlobed; pedicel 6-9 mm. Seed coat dull; cells ± smooth. 2n = 14.
Flowering Mar.--May. Rocky, volcanic soils; of conservation concern; 1300--3000 m; Calif.
Allium tribracteatum is known only from the Sierra Nevada in Tuolumne County.
Open Interactive Map
Click to Display
22 Total Images
Powered by
Symbiota