Dais 28 1946 Cruades National Monument, San Diego to, Calif. to Canyon, Contra Costa to, Calif. May 13, 1946 The mountain chain and came to a road juncture, one fork leading to San Carlos, the other to Idria Mines. The fork to Idria Mines is the correct road to take. There are numerous mercury mines in this area, of which Idria Mines are apparently the largest & best known. Eventually we came to the mine headquarters, which includes a church and gasoline + grocery store. All along the road we had noted small clumps of yucca whipplei, but they were on very steep slopes, and Xan- thusia sticks to flat areas, so we did not attempt any collecting. At Idria Mines the dirt road joined the paved road leading NW to Panoche. We drove out this road, stopping at one place where the yucca was growing at the base of a rather steep hill. We tore apart nu- merous dead plants, but found no Xanthusia. The country here is almost reminiscent of the Mojave Desert, phy- siographically if not botanically. The mountain chains are steep and