Lepidium densiflorum

Species category

Weed

Common name

common pepperweed, tall pepperweed, bigseed pepperweed, babyseed pepperweed, miner's pepperweed

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

Compressed ovalOval:
Broadly elliptic.

Size

  • Length 1.75 mm
  • Width 1 mm
  • Thickness 0.5 mm

Color

Brown

Texture

Shiny and reticulatedReticulated:
Resembling a net or network, especially having veins, fibers, or lines crossing the surface.  

Other structures

Seed has longitudinal groove between lobes and is winged on curved margin.

Identification notes

Seeds compressed obovateObovate:
Inverted egg shaped with apical end the broadest.
with the radicleRadicle:
The rudimentary root of the embryo, developing into the primary root after emergence from the seed coat.
lobe margin more curved than the cotyledonCotyledon:
The modified storage leaf or pair of leaves of an embryo and seedling (see primary leaf).
lobe. The line between the two lobes is distinct. Surface is brown, somewhat shiny but slightly rough. The distal margin of the seed is winged.

Noxious weed seed categories

State Noxious Weed: Arizona 

AOSA examination list

Not included

Nomenclature

Family

Brassicaceae

Valid name

Lepidium densiflorum Schrad.

Synonyms

Lepidium densiflorum Schrad. var. densiflorum
Lepidium densiflorum Schrad. var. elongatum (Rydb.) Thell.
Lepidium densiflorum Schrad. var. macrocarpum G. Mulligan
Lepidium densiflorum Schrad. var. pubecarpum (A. Nelson) Thell. 
Lepidium densiflorum Schrad. var. ramosum (A. Nelson) Thell.
Lepidium densiflorum Schrad. var. typicum Thell.
Lepidium elongatum Rydb.
Lepidium neglectum Thell.
Lepidium pubecarpum A. Nelson
Lepidium ramosum A. Nelson
Lepidium texanum Buckley

From Left to Right: 1.  Lepidium densiflorum  2.  Lepidium sativum  3.  Lepidium virginicum . Seeds with a groove between the lobes.
From Left to Right: 1. Lepidium densiflorum 2. Lepidium sativum 3. Lepidium virginicum. Seeds with a groove between the lobes.
 Lepidium densiflorum.  Seeds with a brown, shiny, and rough surface.
Lepidium densiflorum. Seeds with a brown, shiny, and rough surface.