Camissonia cheiranthifolia

Camissonia cheiranthifolia (Sprengel) Raim.
Beach evening primrose

Family:  Onagraceae

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