Ericameria pinifolia (A. Gray) H.M. Hall
Pine-bush (syn. Haplopappus pinifolia)
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