Al Schneider's Rocky Mountains Plant Descriptions

Freckled Milk-vetch
Astragalus lentiginosus
Pea family (Fabaceae)

Freckled Milkvetch is the most variable of all milkvetch with 50 different varieties. Populations of this milkvetch and other similarly short-lived Astragalus, rise and fall cyclically with short-term climate precipitation cycles. This milkvetch is usually an early spring Astragalus. It grows in dense and large tufts of numerous arching , usually on red stems. Where you find one mound of this plant, you will often find a dozen more within twenty feet. Beautifully symmetrical, delicately streaked flowers top the mass of leaves on leafless straight stems. This plant is toxic to livestock, especially to sheep. David Douglas (of Douglas Fir fame) is given credit for discovering A. lentiginosus for science in the early 1800s in northeast Oregon.


©2011 Keir Morse

Description

Short-lived with stems to 20" tall, somewhat hairy. Leaves to 6" long, 9-23, 1/10-1" long, narrow, to or , hairy or on one or both sides. 1/4-5" long. 11-30 flowered, flowers upright to declining, short pedicles. Flowers from 1/3-1" long pink purple, light yellow, white, or suffused with pink or purple. Pods upright to declining, usually , or not, hairy or smooth, mottled or not.

Field Marks

White and pink striped flowers in upright on stems to 5".

© Al Schneider

inflated -- Swollen. Looks unusually large.

A peduncle is a common stalk of a cluster of flowers.

A perennial plant lives and blooms for many years.

ovate -- Oval, egg-shaped, with a tapering point.

leaflets -- Each little leaf-like thing in a compound leaf is a leaflet.

elliptic -- Oval, with no point or a very short point.

A raceme is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along its axis.

glabrous -- smooth, glossy, having no bristles or hair-like structures. Bald.

lanceolate -- Lance-shaped. Long, wider in the middle.

sessile -- attached without a stalk. For example, a leaf that clasps the stalk. A petiolate leaf has a stalk.