Astragalus bisulcatus

Species category

Flower

Common name

twogrooved milkvetch

Diagnostic characters

Planting unit

True seedTrue seed:
A mature fertilized ovule consisting of an embryo, with or without and external food reserve (e.g., endosperm) enclosed by the testa.

Shape

OvalOval:
Broadly elliptic.
to mitten shaped, divergent radicleRadicle:
The rudimentary root of the embryo, developing into the primary root after emergence from the seed coat.

Size

  • Length: 2.5 mm
  • Width: 2 mm
  • Thickness: 1 mm

Color

Greenish brown with yellow adjacent hilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).

Texture

Smooth with undulating surface

Other structures

Divergent radicleRadicle:
The rudimentary root of the embryo, developing into the primary root after emergence from the seed coat.
lobe is recurved toward seed.

Identification notes

HilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
is located deep in marginal cleft between the cotyledonCotyledon:
The modified storage leaf or pair of leaves of an embryo and seedling (see primary leaf).
and radicleRadicle:
The rudimentary root of the embryo, developing into the primary root after emergence from the seed coat.
lobes. The radicleRadicle:
The rudimentary root of the embryo, developing into the primary root after emergence from the seed coat.
tip is thick and turned inward towards the cotyledonary lobe. Overall shape is ovalOval:
Broadly elliptic.
with the deep marginal notch making the seed appear mitten-shaped. No noticeable "furrow" line.

Noxious weed seed categories

State Noxious Weed: Hawaii

AOSA examination list

Not included

Nomenclature

Family

Fabaceae

Valid name

Astragalus bisulcatus (Hook.) A. Gray

 Astragalus bisulcatus.  Oval to mitten-shaped true seeds. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.
Astragalus bisulcatus. Oval to mitten-shaped true seeds. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.