Large, spreading, oval in outline, evergreen, with large fragrant flowers; gregarious in moist gravelly places along the shore of the bay, and in depressions, or banks of runs, where the soil partakes of a clayey nature.

Pickeringia montana Nutt.

Large, spreading, four to seven feet high; evergreen, and gregarious on the Oakland white sand-stone hills.

Cerasus Ilicifolia Nutt. California Cherry, or Plum.

A small tree, eight to fifteen feet high, with thick, shining, spinously serrate, evergreen leaves; fruit of a yellowish pink color, with a thin pulpy external portion. Hill sides on the peninsula of San Francisco, growing mostly in groups; rare.

Cerasus serotina Ehrh. Black Wild-Cherry.

A group of three or four small trees, eight to twelve feet high, near a road in the Oakland hills. Undoubtedly introduced from the Atlantic States.

Cerasus emarginata? Dougl.

A small shrub, three to four feet high, with very slender reddish and white dotted branchlets, and deciduous leaves; rare. Tamal Pais, 2,700 feet elevation.

Nuttallia Cerasiformis Torr. and Gray.