Lupinus succulentus Dougl. ex Koch
Habit: Stout annual, 2 to 10 dm. tall, sparsely hairy. Flowers are generally blue-purple with a white banner spot.
Distribution: Abundant in open or disturbed areas on grassy flats and slopes. California coast ranges from Mendocino County to Baja California and inland to Butte and Shasta Counties.
Seed unit: Free seed.
Seed: Oblong, 4 to 5 mm. Distinct in having its hilum terminal and often surrounded by a collar which protrudes outward. Hard seed coat is often mottled or streaked with dark and light markings.
Embryo: Foliar embryo with radical tip at the terminal end of the seed.
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. Separated cotyledons are regarded as inert matter.
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: 36 seeds per gram (based on AOSA pure seed units only from 90 samples received for testing from 1992 to 2003).
Range of percent pure seed: 96% to 99%
Range of percent inert: .01% to 2%
Description of inert: Broken seed, stone, dirt.
Planting instructions: 400 seeds, T, 18 days @ 20°C; for fresh and dormant seed, prechill recommended.
References: (link to main reference page)
Hickman, J.C., Ed. 1993. p. 636.
Munz, P.A. and D.D. Keck. 1968. p. 813.
Ransom Seed Laboratory