U.S. DEPARTMENT OF THE INTERIORBUREAU OF LAND MANAGEMENT
 
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Triple-Ribbed Milk-Vetch
(Astragalus tricarinatus )
Fabaceae


Triple-Ribbed Milk-Vetch

Description: Perennial, loosely bushy herbs with erect, stiff stems, 2 - 10 inches (5-25cm) long. Leaves 2 1/4 - 8 inches (7-20cm) long, with 17 - 27 leaflets 1/8 - 1/2 inch (3-12mm) long, narrowly obovate, with stiff, straight, sharp, silvery hairs on top surface, and greenish on the lower surface. Inflorescence is a raceme with 5 - 15 flowers. Petals are cream -colored, with the banner (largest petal) 1/2 - 5/8 inch (13-16mm) long. Fruit is a narrow, 3-sided pod, 1 - 1 5/8 inches (24-42mm) long, 1/8 - 1/4 inch (3.5-5.5mm) wide, with a stalk-like base, and growing upward. 

Distribution:

Habitat: Exposed rocky slopes, gravelly places, canyon walls, creosote bush scrub, and Joshua tree "woodland". Elevation 1440-2656 feet.

Flowering Period: Blooms February to May.

Similar Plants:

Status: Federal Endangered, California Native Plant Society List 1B

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Field Office: Palm Springs

 
Last updated: 08-05-2010