| Lyall's phacelia | |
|---|---|
 | |
| On scree in Waterton Lakes National Park, Alberta | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Boraginales |
| Family: | Boraginaceae |
| Genus: | Phacelia |
| Species: | P. lyallii |
| Binomial name | |
| Phacelia lyallii (Gray) Rydb. | |
Phacelia lyallii, common name Lyall's phacelia, is a species of plant in the family Boraginaceae. Classifications in older literature place it within the Hydrophyllaceae.
Habitat
Phacelia lyallii is native to the central Rocky Mountains of North America. Its distribution covers western Montana, southwestern Alberta (Waterton Lakes National Park), central Idaho (Lemhi County), and extreme southeastern British Columbia (Akamina-Kishinena Provincial Park. It is restricted to scree slopes and crevices on quartzite substrates in alpine areas, often in areas with abundant snowmelt.
Ecology
Phacelia lyalii is known to be pollinated by several Bombus species. It closely resembles Phacelia sericea with which it co-occurs, but can be distinguished by its relatively shallowly-cleft, pinnately-lobed leaves.
Threats
Phacelia lyallii populations are separated by large areas of unsuitable habitat. They are also expected to have poor dispersal ability. This, along with their high-elevation niche and dependence on summer snowmelt, puts P. lyallii at a high risk of extinction from climate change. Within the southern portion of its range P. lyallii is vulnerable to disturbance from mining. From Glacier National Park and northward, P. lyallii is confined to protected areas.
References
- Douglas, George (1999). Illustrated Flora of British Columbia, Volume 3: Dicotyledons (Diapensiaceae through Onagraceae) (PDF). Victoria, BC: B.C. Min. Environ., Lands and Parks, and B.C. Min. For. pp. 246–250. Retrieved 6 March 2022.
- Dhaemers, Jessica; Brown, Brittni; Proctor, John. "Untitled" (PDF). Forest Service U.S. Department of Agriculture. U.S.Forest Service. Retrieved 6 March 2022.
- "Lyall's Phacelia". Idaho Official Government Website. Idaho Fish & Game. Retrieved 6 March 2022.
- "Lyall's Phacelia - Phacelia lyallii". Montana Field Guide. Montana Natural Heritage Program. Retrieved 6 March 2022.
- "Lyall's Phacelia". NatureServe Explorer. NatureServe. Retrieved 6 March 2022.
- Robin, Spahr; Lori, Armstrong; Duane, Atwood; Mike, Rath (1991). Threatened, endangered, and sensitive species of the Intermountain Region. Ogden, Utah: U.S. Dept. of Agriculture, Forest Service, Intermountain Region. pp. 480–481. Retrieved 6 March 2022.