Cooper’s milkvetch

Cooper’s milkvetch

 

 

 

 

 

 

 

 

 

More photos…

Astragalus neglectus


Taxonomy

Family:

Fabaceae (pea)

 

Subfamily:

Faboideae

 

Tribe:

Galegeae

 

Subtribe:

Astragalinae

 

Clade:

Coluteinae


Nativity

Native

Status

 

Habitat

Lake shores, stream banks, river banks. Full to partial sun.

Flowering

Jume to July

Flower Color

White to cream

Height

12 to 36


Identification

This is a 12 to 36 tall, erect, perennial forb rising on a cluster of stems from a taproot.

The stems are more or less erect, branching, leafy, usually hollow, and hairless or nearly hairless.

The leaves are alternate and pinnately divided into 11 to 23 leaflets. Each leaf has a terminal leaflet and an odd total number of leaflets. There is an egg-shaped, pointed, to long stipule at the base of each leaf stalk.

The leaflets are oblong to inversely egg-shaped and to 13 16 long. The lower surface of the leaf blade is covered with straight, stiff, sharp, appressed hairs.

The inflorescence is several short, unbranched clusters (racemes) of 10 to 20 stalked flowers rising on a stalk from the leaf axils. The stalk and raceme together barely surpass in length the subtending leaf.

The flowers are 7 16 to long. There are 5 sepals fused for most of their length into a to 3 16 long, cylinder-shaped tube (calyx), then separated into 5 lobes about half as long as the tube. The 5 petals are white to cream colored and form a butterfly-like corolla, as is typical of plants in the Pea family. They are organized into a broad banner petal at the top, two lateral wing petals, and between the wings two petals fused into a keel. The banner is notched at the tip.

The fruit is a, inflated, spindle-shaped or egg-shaped, to ¾ long, 5 16 to 11 16 wide seedpod. The pod is stalkless and straight. It is held erect or spreading, not drooping.

 
Similar
Species

 


Range Range Map   Sources: 2, 3, 5, 7.
 
Sightings

 

Two Rivers Aspen Prairie Parkland SNA


Comments

 


Images  
Plant Cooper’s milkvetch            
               
Leaf Cooper’s milkvetch            
               
Inflorescence Cooper’s milkvetch            

Synonyms

Astragalus cooperi

Phaca neglecta

 
Common
Names

Cooper’s milk-vetch

Cooper’s milkvetch


 

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