Mentzelia mollis
| Mentzelia mollis | |
|---|---|
 | |
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Cornales |
| Family: | Loasaceae |
| Genus: | Mentzelia |
| Species: | M. mollis |
| Binomial name | |
| Mentzelia mollis M.Peck | |
Mentzelia mollis is a species of flowering plant in the Loasaceae known by the common names soft blazingstar,[1] smooth blazingstar, and smooth stickleaf. It is native to the western United States, where it occurs in Idaho, Oregon, and Nevada.[2][3]
This annual herb grows 5 to 12 centimeters tall with a thick, branching, erect stem. The leaves are lance-shaped and mostly smooth-edged. It produces flowers with bright yellow flowers with petals about a centimeter long and with many stamens in the middle. Flowering occurs in May and June.[2] The flowers are visited by bumblebees.[3] The fruit is a four-sided capsule about 2.5 centimeters long.[2]
This plant grows on deposits of montmorillonite, a slick, powdery clay soil. It also grows on volcanic ash soils high in potassium. The substrate is also high in calcium and sodium. Summer soil temperatures are hot.[3] The soils are mostly barren of vegetation but may host other annuals such as Monolepis pusilla, Mentzelia albicaulis, Cleomella macbrideana, and Phacelia humilis.[4] Only 10 to 12 inches of annual precipitation falls in the area.[3]
This species is distributed in Malheur County, Oregon, Owyhee County, Idaho, and Humboldt County, Nevada.[5] Threats include habitat destruction from mining activity and off-road vehicle use.[2][5]
References
- ↑ "Mentzelia mollis". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 7 July 2015.
- 1 2 3 4 Mentzelia mollis. The Nature Conservancy.
- 1 2 3 4 Mentzelia mollis. Center for Plant Conservation.
- ↑ Mentzelia mollis. Nevada Natural Heritage Program.
- 1 2 Mentzelia mollis. Oregon Department of Agriculture.