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Crotalaria longirostrata

Species category

Weed

Common name

longbeak rattlebox

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

Size

  • Length 3.5 mm
  • Width 2.5 mm
  • Thickness 1 mm

Color

Golden-brown to brown

Texture

Shiny and smooth

Other structures

Divergent radicleRadicle:
The rudimentary root of the embryo, developing into the primary root after emergence from the seed coat.
 lobe with a slight hook, which partially covers the hilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
.

Identification notes

The marginal hilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
 is partially covered by the radicle lobe. The radicleRadicle:
The rudimentary root of the embryo, developing into the primary root after emergence from the seed coat.
 lobe is divergent from the cotyledonCotyledon:
The modified storage leaf or pair of leaves of an embryo and seedling (see primary leaf).
 lobe and is slightly hooked.

Noxious weed seed categories

State Noxious Weed: Alabama, Arkansas, Georgia, Hawaii, Mississippi

AOSA examination list

Not included

Nomenclature

Family

Fabaceae

Valid name

Crotalaria longirostrata Hook. & Arn.

Crotalaria longirostrata. Seeds with a divergent radicle lobe with a slight hook, which partially covers the hilum. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.
Crotalaria longirostrata. Seeds with a divergent radicle lobe with a slight hook, which partially covers the hilum. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.