Oxytropis lambertii

Species category

Weed

Common name

purple locoweed, stemless loco, white woollyloco, whitepoint locoweed, Lambert's crazyweed, Lambert's locoweed, purple loco

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, with divergent radicleRadicle:
The rudimentary root of the embryo, developing into the primary root after emergence from the seed coat.

Size

  • Length 2–2.8 mm 
  • Width 2–2.2 mm 
  • Thickness 1–1.2 mm 

Color

Olive-green to brown

Texture

Dull

Other structures

HilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
is in cleft in seed margin.

Identification notes

RadicleRadicle:
The rudimentary root of the embryo, developing into the primary root after emergence from the seed coat.
lobe approximately equal in length to the cotyledonCotyledon:
The modified storage leaf or pair of leaves of an embryo and seedling (see primary leaf).
lobe. Shape variable from ovalOval:
Broadly elliptic.
to "human" heart-shaped to mitten-shaped. Tops of the cotyledonary and radicleRadicle:
The rudimentary root of the embryo, developing into the primary root after emergence from the seed coat.
lobes are often lighter-colored.

Noxious weed seed categories

State Noxious Weed: Hawaii

AOSA examination list

Not included

Nomenclature

Family

Fabaceae

Valid name

Oxytropis lambertii Pursh

 Oxytropis lambertii.  The seed shape is variable from oval to
Oxytropis lambertii. The seed shape is variable from oval to "human" heart-shaped to mitten-shaped. 
 Oxytropis lambertii.  The top of the cotyledonary and radicle lobe is often lighter colored. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.
Oxytropis lambertii. The top of the cotyledonary and radicle lobe is often lighter colored. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.