A flat manzanita. It grows on old ocean beaches and bluffs near Arroyo de la Cruz Creek north of San Simeon, California. The soil varies from a near adobe thru red clay on hard pan to a gray sand-rock composite. It receives summer fog drip and rainfall of about 20-30 inches. It is one of the most moderate climates in the world. Every day has a high of 60-65 degrees F. and a low of 50 degrees F. The coastal sage scrub community has Ceanothus hearstiorum, C. thyrsiflorus, C. griseus, Adenostoma fasciculatum, Iris douglasiana, Lonicera involucrata, some Pinus radiata (closed cone pine forest), Baccharis pilularis, Salvia mellifera, Toxicodendron diversilobum, Diplacus aurantiacus, and Lupinus arboreus (among others).
Arctostaphylos hookeri var. hearstiorum tolerates clay.
Foliage of Arctostaphylos hookeri var. hearstiorum is evergreen.
Flower of Arctostaphylos hookeri var. hearstiorum has color white.
Communities for Arctostaphylos hookeri var. hearstiorum:Coastal Sage Scrub.