Alpine Milk-Vetch vs Colton's Milkvetch

Astragalus alpinus compared with Astragalus coltonii

Taxonomic Classification

Rank	Alpine Milk-Vetch	Colton's Milkvetch
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order same	Fabales (Legumes & Allies)	Fabales (Legumes & Allies)
Family same	Fabaceae	Fabaceae
Genus same	Astragalus	Astragalus
Species	Astragalus alpinus	Astragalus coltonii

Evolutionary Relationship

Alpine Milk-Vetch and Colton's Milkvetch share a common ancestor at the Genus level: Astragalus.

Conservation Status

Alpine Milk-Vetch

LC — Least Concern

Colton's Milkvetch

LC — Least Concern

Physical Characteristics

Attribute	Alpine Milk-Vetch	Colton's Milkvetch
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Alpine Milk-Vetch

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found across Europe (5 countries) and North America (United States).

Colton's Milkvetch

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Alpine Milk-Vetch

The Alpine Milk-Vetch (Astragalus alpinus) is a species in the genus Astragalus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions. Found across Europe (5 countries) and North America (United States).

Colton's Milkvetch

<em>Astragalus coltonii</em>, Colton's milkvetch, is a perennial legume in the family Fabaceae assessed as Least Concern by the IUCN. The genus <em>Astragalus</em> is the largest genus of flowering plants globally, with over 3,000 species distributed primarily in temperate and arid regions of the Northern Hemisphere. <em>Astragalus coltonii</em> inhabits diverse terrestrial environments, typically including semi-arid shrublands, rocky soils, and open desert margins where competition from taller vegetation is limited. Like other milkvetches, this species likely forms root associations with nitrogen-fixing bacteria, enabling it to colonise nutrient-poor substrates and contribute to soil fertility improvement in its habitat. The pinnately compound leaves, pea-type flowers, and inflated seed pods characteristic of the genus are typical features of this species. Milkvetches provide forage for native pollinators and serve as larval host plants for several butterfly and moth species. Some <em>Astragalus</em> species accumulate selenium or alkaloids from the soil, making them toxic to livestock, though the toxicological properties of <em>A. coltonii</em> specifically have not been well characterised. Biological traits of this species remain poorly documented in the scientific literature.