Passey's Onion
C. Delmatier; C. Delmatier
Allium passeyi
NatureServe conservation status
Global (G-rank): G1
State (S-rank): S1
Utah Wildlife Action Plan status
- SGCN
External links
General information
Allium passeyi also known as Passey’s onion is a perennial bulbous herb with pink to white flowers. This onion is endemic to the Blue Creek Valley in Utah and appears to be restricted to thin, dolomitic or lithosolic soils.
Description
Allium passeyi also known as Passey’s onion is a perennial bulbous herb with pink to white flowers. This onion is endemic to the Blue Creek Valley in Utah and appears to be restricted to thin, dolomitic or lithosolic soils.
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.
Taxonomy
No, this species does not have taxonomic discrepancies