SafePlants

Astragalus cremnophylax: Sentry Milkvetch

Astragalus cremnophylax, commonly known as sentry milkvetch or cliff milkvetch, is a rare and endangered plant species.

Considerations for Pets

• This plant can be grown in the garden year round.

Taxonomy and Nomenclature

• Scientific Name: Astragalus cremnophylax Barneby
• Common Names: Sentry Milkvetch, Cliff Milkvetch
• Family: Fabaceae
• Varieties:
  • Astragalus cremnophylax var. cremnophylax Barneby
  • Astragalus cremnophylax var. myriorrhaphis Barneby

Distribution and Habitat

• Astragalus cremnophylax is endemic to Arizona, specifically the Grand Canyon area.
• It grows on the North and South Rims of the Grand Canyon.
• This species is described as a "rock-hugging plant" that grows in sites overlooking the Grand Canyon.

Morphological Characteristics and Growth Habits

• It is described as a small blooming plant.
• It is classified as a forb/herb, which means it is a non-woody plant that is not a grass.

Ecological Role

• The sentry milkvetch is the only federally-listed endangered plant within its range in the Grand Canyon area.
• It is considered one of the Grand Canyon's rarest plants.

Conservation Status

• Listed as Endangered in 1990.
• Recovery plans have been prepared by the U.S. Fish and Wildlife Service to implement actions to bolster its populations.

Quirky Facts

• The scientific name "cremnophylax" means "gorge guard."

Further Information

• U.S. Fish & Wildlife Service
• Grand Canyon National Park
• The Arboretum at Flagstaff
• Discover Life: Astragalus cremnophylax
• Encyclopedia of Life: Astragalus cremnophylax