| Astragalus ampullarioides | |
|---|---|
| Conservation status | |
|
Critically Imperiled (NatureServe) |
|
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Rosids |
| Order: | Fabales |
| Family: | Fabaceae |
| Genus: | Astragalus |
| Species: | A. ampullarioides |
| Binomial name | |
| Astragalus ampullarioides (Walsh) Walsh |
|
Astragalus ampullarioides is a rare species of milkvetch known by the common name Shivwits milkvetch. It was previously classified as a variety of Astragalus eremiticus.[1] It is endemic to Washington County, Utah, where it is known from only seven populations.[1] Estimates of the total number of individuals range from 1000[2] to 4200.[3] The species occurs in desert scrub and woodlands on the Chinle Formation.[4] It is a federally listed endangered species.
This is a perennial herb growing erect to a maximum height near half a meter. It produces about 45 flowers on an erect inflorescence.[4] It is pollinated by bees.[1]
Much of the plant's range is within the bounds of Zion National Park and Shivwits tribal lands.[4] Other parts of the range are unprotected. Threats to the species include habitat loss to development and agriculture, herbivory by rabbits, cattle grazing, off-road vehicles, quarrying, and introduced plant species.[2][4]