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Photo by C. Delmatier; C. Delmatier
C. Delmatier; C. Delmatier
Passey's Onion
Allium passeyi
NatureServe conservation status
Global (G-rank): G1
State (S-rank): S1
External links
Phenology
Flowering from late May through June.
Diagnostic characteristics
While Allium passeyi is similar to A. geyeri and A. textile, passey onion has wider leaves at 3-6.5 mm compared to 3 mm of less. Passy onion has different habitat presences compared to A. geyeri as the later favors mesic sites. A. geyeri also has scapes that far surpass the leaves and A. textile has white flowers and smooth surfaced seeds compared to A. passeyi’s pink flowers and pustules surfaced seeds.
Species range
Allium passeyi is endemic to the Blue Creek Valley in Box Elder county, Utah.
Threats or limiting factors
The inheriently small distribution and population size may increase the species’ vulnerability to threats. Main threats to this species are grazing, invasive plant species, drought and potential habitat destruction as this species is restricted to rocky, shallow lithosolic soils.
