Very common, variable, four to ten feet high; evergreen, gregarious, in clayey soil.
Ceanothus thyrsiflorus Esch. California Lilac.
Very common, and variable in size, sometimes handsome trees; exceedingly gregarious, forming dense chaparral, on the northern and eastern slopes of hills and mountains; evergreen. Much cultivated on account of the profusion of its fragrant flowers, and the various shapes that may be given it by trimming.
Ceanothus rigidus Nutt.
Low, straggling, four to six feet high, less gregarious than the former; on the white sand-stone hills, east of Oakland.
Ceanothus ——.
A small shrub, three to four feet high, with very small glandular leaves; mostly single or in groups, on Mount Tamal Pais at 2,700 feet elevation.
Lupinus albifrons Benth. Silver-Leaved Lupine.
Very common in almost pure sandy soil, oblong in outline, two to six feet high; growing mostly single, evergreen.