Camissonia cheiranthifolia (Sprengel) Raim.
Beach evening primrose
Habit: Perennial, prostrate, short-lived subshrub with wiry stems radiating from central rosette. Day-flowering.
Distribution: Found on beaches, coastal dunes, and sandy slopes from Oregon to Baja California.
Seed unit: Free seed.
Seed: 1.2 to 1.3 mm. long, dull brownish to black, obovoid minutely cellular-pitted. Fruit is four-angled, coiled capsule containing seeds in one row per chamber.
Embryo: Foliar embryo.
Purity instructions: Pure seed definition:
AOSA: PSU #1 – Seed, with or without seed coat. Piece of broken seed, with or without seed coat, larger than one-half the original size.
ISTA: PSD #10 – Seed, with or without testa. Piece of seed larger than one-half the original size, with or without testa.
Average pure seed units per gram: 5,997 seeds per gram (based on AOSA pure seed units only from 13 samples received for testing from 1994 to 2004).
Range of percent pure seed: 87% to 99%
Range of percent inert: 1% to 12%
Description of inert: Dirt, broken seed, plant material.
Planting instructions: 400 seeds, TB, light, 21 days @ 20°C; for fresh and dormant seed, prechill recommended.
References: (link to main reference page)
Hickman, J.C., Ed. 1993. p. 782.
Munz, P.A. and D.D. Keck. 1968. p. 957.
Ransom Seed Laboratory
Rules for Testing Seeds, AOSA