Cactus, Blair 1976 Journal March 11, 1976 Box Springs, San Bernardino Co., California arrived 11:45 am. wind ca. 20 mph from N., Temp 55° F, sky clear. Plants present: Blackbrush - NOT yet in flower; Yucca brevifolia, Ephedra, Atigles canescens, some A. confertiflora, Lysion, crevate bush. Soil very rocky, habitat fractured by many gulley ca. 10 ft. deep, no flat area. soil too rocky here for microgys in my opinion . 6,0 m. 5.E of Juane Valley on RT. 14. Custerburg Springs, San Bernardino Co., California stopped just North of Kaiser cement plant, approximately adjacent to Custerburg Springs. Ephedra, A. canescens, Blackbrush here, but ground is covered by hard crust formed from dust settling out from cement plant. No exposed soil between bushes. Locality ruined by industrial wastes. Cactus Flat, San Bernardino Co., California 5,900ft, arrived 12:15 PM. Transition of plants here, Pita Pine, junipers, Yucca brevifolia, Ponchia Tridentata, Artemisia tridentata, Cholla cactus, some Ephedra. Soil sandy, soft, few rocks, no Blackbrush or evidence of burrow complexes. Too high for microgys - Antelopa bums replaces Blackbrush in the E. slope of the peaks, I observe the same here.