Plagiobothrys acanthocarpus (Piper) I.M.Johnst.

RANCHO SANTA ANA BOTANIC GARDEN
Flora of Los Angeles County, California, U.S.A.
Boraginaceae
Plagiobothrys acanthocarpus (Piper) l.MJohnston
SANTA CATALINA ISLAND: SW part of the island in
the vicinity of Cactus Peak (1560 ft); 1200 m ESE of
Cactus Peak summit; SE slope of 1528-foot peak, not far
below its summit; Santa Catalina South USGS 7.5' quad-
near 33°20'01"N 118°25'57"W; ca 1495 feet elevation.
Annual, locally abundant in a very localized patch
(perhaps 3 x 3 m) on cobbly clay soil. Corolla 2-3 mm
broad, white with yellow throat; nutlets 4, pricldey;
prickles to 0.75 mm long, these with spreading to mostly
retrorse barbs. Not seen elsewhere in vicinity.
Previously unreported in the Catalina flora.
Tim Ross 6895
22 April 1993
03247746