Lepidium nitidum  Nutt.
Tongue pepperweed

Family:  Brassicaceae

Habit:  Annual, erect to spreading, 1 to 4 dm; Stems slender, glabrous to moderately pubescent.

Distribution:  Common on alkaline soils, flats and slopes below 3000 feet throughout California, to Washington and Baja California.

Seed unit:  Free seed.

Seed:  2 to 3 mm. long, ovate-elliptic, pinkish brown, flat, with one edge thicker than the other.  Seeds are found one per chamber in the dehiscent fruit.

Embryo:  Foliar embryo, bent or folded, mucilaginous seed coat.

Purity instructions:   Pure seed definition:
AOSA:  PSU# 2 Seed with at least a portion of the seed coat attached.  Broken seed larger than one-half the original size with at least a portion of the seed coat attached.
ISTA:  PSD #10 Seed, with or without testa.  Piece of seed larger than one-half the original size, with or without testa.  Brassicaceae:  seeds and pieces of seed without testa are regarded as inert matter.

Lab notes:  Seeds are gelatinous when wetted.  Samples often contain a high percentage of dormant seeds; viability of ungerminated seeds may be determined using TZ.

Average pure seed units per gram:  998 seeds per gram (based on AOSA pure seed units only from 15 samples received for testing from 1992 to 2004).

Range of percent pure seed:   93 to 99%

Range of percent inert:  1 to 3%

Description of inert:  Plant material, dirt, stone.

Planting instructions:  400 seeds, TB, 14 days @ 20C; for fresh and dormant seed, GA3 recommended.

References: (link to main reference page)
Hickman, J.C., Ed.  1993.  p. 429.
Munz, P.A. and D.D. Keck.  1968.  p. 228.
Martin, A.C. and W.D. Barkley.  1961.  p. 162.
Ransom Seed Laboratory

 

Copyright Ransom Seed Laboratory - All rights reserved