Family: Asteraceae

Habit: Yellow-flowered, low-growing shrub.

Distribution: Chaparral, oak woodland, scrub away from coast, southwestern California and Sonoran Desert.

Seed unit: Achene with or without pappus.

Seed: 4.5 to 5 mm. subcylindric, striate and lightly hairy.

Embryo: Linear with well-developed cotyledons, no endosperm.

Purity instructions: Pure seed definition: 
AOSA: PSU# 50 - Intact achene, with or without one or more of the following structures: beak, bristle, hairs, pappus, wing, or firmly attached floral remnants, provided a true seed with some degree of embryo development can be detected (either by slight pressure or by examination over light).
Piece of broken achene larger than one-half of the original size, unless no seed is present. Seed, with or without pericarp/seed coat; if broken, larger than one-half the original size.
ISTA: PSD#1 – Achene with or without pappus, unless it is obvious that no seed is present.

Average pure seed units per gram:  1,967 seeds per gram (based on AOSA pure seed units only from 12 samples received for testing from 1995 to 2001.

Range of percent pure seed: 8% to 12%

Range of percent inert: 83% to 91%

Description of inert: Plant material, broken seeds, dead insects.

Planting instructions: 400 seeds, TB, 21 days @ 20°C; for fresh and dormant seed, prechill recommended.

References: (link to main reference page)
Hickman, J. Ed. 1993. p. 253
Ransom Seed Laboratory