_B. pilularis D. C. et B. glomeruliflora Hooker_, seem to be identical. It is an exceedingly varying shrub; on sandy soil, low, creeping, with numerous fastigiate branchlets, the flowers mostly pistillate, and the heads less crowded; on clayey soil, especially on the banks of creeks, it is often fifteen feet high, quite tree-like, oblong in outline, the flowers mostly staminate, and the heads very much crowded. All forms are subject to excrescences, but especially those growing in a sandy soil. Evergreen. _Bahia Artemisiæfolia_ Less. Ovate in outline, two to three feet high, evergreen; common on northern slopes, shores of the bay, and Oakland hills. _Artemisia filifolia_ Torr. WORMWOOD. Large root-stocks with numerous slender branches, three to four feet high. Occupying almost invariably the southern slopes in common with Diplacus glutinosus. Both plants, on account of the leaden color of their leaves and branches, give the southern slopes that barren appearance, contrasting so strongly with the vegetation of the northern slopes. _Artemisia pachystachya_ D. C. Sandy soil, three to four feet high. Peninsula of San Francisco. _Vaccinium ovatum_ Pursh. EVERGREEN HUCKLEBERRY. A beautiful shrub, five to ten feet high, with slender upright branches; berries delicious. In light sandy soil, on the eastern slopes of Oakland hills. _Arbutus Menziesii_ Pursh. Madroña. Evergreen, twenty to thirty feet high, on the northern and eastern slopes of the Oakland hills, but more common and generally larger and finer on the hill sides near San Rafael. _Arctostaphylos tomentosa_ Dougl. Mansañita. Low, straggling, evergreen, and gregarious on the out-croppings of white sandstone in the Oakland hills. _Arctostaphylos pungens_ H. B. K. Mansañita. Obovate in outline, ten to fifteen feet high; scattered. _Gaultheria Shallon_ Pursh. MARIS. SALLAL. Low, creeping, evergreen, covering large tracts of land among the hills of Marin County. Berries eatable. _Azalea occidentalis_ Torr. and Gray. On the banks of creeks in Marin County. Quite common; five to twelve feet high. _Diplacus glutinosus_ Nutt. Southern and western slopes. Resinous, eight feet high; common. _Sphacele calycina_ Benth. Mostly gregarious, five to eight feet high. Near the coast, Marin County; eastern slopes near San Mateo. _Eriodiction Californicum_ Benth. Very glutinous, two to four feet high—evergreen. Dry hill sides, Tamal Pais. _Solanum umbelliferum_ Esch. A slender evergreen shrub, two to four feet high on the bluffs of the bay. _Fraxinus Oregana_ Nutt. OREGON ASH. On the banks of creeks, Marin County; twenty to thirty feet high. _Oreodaphne Californica_ Nées. SPICE BUSH, MOUNTAIN LAUREL, BALM OF HEAVEN.