October 26, 1907 115 
THE FLORA OF SANTA CLARA COUNTY, 
CALIFORNIA—VI 
By A. A. HELLER 
Unless a statement is made to the contrary, all the species 
mentioned in this paper may be found on the ridges west of 
Los Gatos, where they have been observed and collected by my- 
self. 
APRIL—Continued 
TOXICODENDRON DIVERSILOBUM (T. & G.) Greene 
The poison oak, well known to all, is entirely too common 
everywhere on our hills. The young leaves are usually reddish. 
Botanists quite generally, at least in this country, are recogniz- 
ing the fact that what we have been calling Rhus is an aggre- 
gate, and are assigning the different species to their proper gen- 
era. The type of the genus Rhus is R. glabra. 
CEANOTHUS SOREDIATUS H. & A. 
This “lilac” is one of the common chaparral bushes on our 
hills, ascending to at least 2000 feet. It is a rather graceful 
shrub, the branches inclined to droop, the flowers commonly 
blue, but sometimes white or nearly so. When in bloom it 
gives color to the hillsides. 
RHAMNUS CROCEA Nutt. 
A low shrub three or four feet high with numerous ascend- 
ing and spreading branches, the leaves evergreen, small, rather 
thick, and commonly yellowish beneath, whence the specific 
name. It is either quite variable, or a number of distinct forms 
have been included under this name. It is found about and in 
thickets, on stream banks or on cool northerly slopes. The type 
was collected by Nuttall near Monterey. 
HELIANTHEMUM SCOPARIUM Nutt. 
This species has been noted at two places near Los Gatos, 
once on a dry gravelly ridge below the Ralston house, and near 
the summit of the ridge southwest of the town on a burnt over 
