California Trees and Flowers. 149 
P. PUBESCENS Benth. The Serew-bean. A smaller tree than the 
Mesquit, with curiously twisted pods. 
PRUNUS. 
P. ILICIFOLIA Walp. The Holly-leaf cherry. A beautiful dark 
evergreen shrub, yielding a pleasant edible fruit. Useful for hedges 
or ornamental planting. 
PSEUDOTSUGA. 
P. Douguastt Carr. The magnificent Douglas spruce, better 
known commercially, perhaps, as the Oregon pine. A gigantic tree, 
200 to over 300 feet in height, and very beautiful. 
Var. macrocarpa Engelm. A small form. 
RHUS. 
R. ovata Watson. A handsome evergreen shrub, noted for its 
glossy foliage and graceful form. The small dark red berries make 
a cooling drink, pleasantly flavored, resembling lemonade, and the 
Indians formerly gathered sugar from this species. Thus it may be 
appropriately termed a Lemonade and Sugar Tree. 
R. INTEGRIFOLIA Nutt. The dark evergreen foliage of this shrub 
or small tree, locally known as the Mahogany, is very handsome, 
while the larger bright red berries, coated with a white waxy sub- 
stance also make a refreshing and cooling drink. The Californians 
formerly gathered and dried the berries for this purpose. 
ROMNEYA. 
This large white-flowering perennial poppy, named in honor of 
Dr. T. Romney Robinson, a noted astronomer, is one of the stateliest 
of California’s contributions to horticulture. It is quite a hardy 
shrub with us, requiring only a sheltered position to protect its 
flowers; in England it is classified as half-hardy. A rich loamy soil 
is most suitable to its needs. In early spring vigorous shoots start 
from the dormant roots, growing from six to fifteen feet high, which 
do not die down but need to be pruned well back in the fall. A 
single species. 
R. CouLttTERI Harvey. This magnificent wax-like flower has be- 
come very popular wherever known. The large hairy buds open at 
daylight, the crimped petals slowly unfolding from over the huge 
bunch of bright yellow stamens (as large as a walnut), until they 
spread out from six to nine inches. The flowers last several days 
and the buds open well in water. The foliage is very effective and 
makes with the flower an artistic study. Grown from either seed or 
euttings with difficulty, but a well established root will well repay 
the attention bestowed upon it. 
ROSA. 
R.-CALIFORNICA C. & S. The wild rose of California, with its 
