California Trees and Flowers. 147 
CGENOTHERA. 
An almost exclusively American genus of over one hundred 
species, many with showy flowers, and some long in cultivation as 
ornamental. 
CE. BIENNIS Z. The Evening primrose, with its large showy 
fiowers, is too well known to need description. 
CH. BISTORTA Nutt. Showy yellow flowers, usually with a dark 
brown spot at base of each petal. A low decumbent annual, the 
variety Veitchiana being the form commonly seen in cultivation. 
Ch. CALIFORNICA Watson. Low flowers, large white, becoming 
pinkish, fragrant. One of the loveliest and most delicate of flowers, 
often two or three inches across. 
ORTHOCARPUS. 
A large genus of low, branching annuals, nearly related to 
Castilleia. 
O. PURPURASCEUS Benth. An erect, diffusely branched annual, a 
span to a foot high, producing numerous dense and thick terminal 
oblong or cylindrical spikes of flowers. Corolla yellowish, tipped 
with crimson or red and the whole encircled by the brilliantly 
colored crimson-purple or rose-purple floral bracts. Hundreds of 
acres are often transformed into brilliant fields of purple by the 
abundance of this, one of the handsomest of the spring annuals of 
California. 
PAPAVER. 
P. CALIFORNICA. Gray. While one of the latest discoveries, this 
plant ranks among the prettiest of our annuals, the fine bushy plant, 
a foot or more high, bearing large showy flowers of an average of 
two inches in diameter. The color isa bright saturn red to orange 
chrome, with a center of delicate sulphur yellow. 
PENTACHAETA. 
P. AUREA Nutt. This small hardy annual, with its large golden 
yellow heads of almost double flowers, introduced into cultivation in 
1884, is a pretty dwarf composite that may be readily grown. 
PENTSTEMON. 
Hardy perennial plants with showy panicles of brilliantly col- 
ored flowers. Several of the numerous California species have long 
been in cultivation. 
P. CENTRANTHIFOLIUS Benth. A showy species, two or three feet 
high, bearing long slender spikes of bright carmine-colored flowers, 
an inch long. Acres’in extent of our mountain lands are sometimes 
a solid mass of carmine during the summer, when this handsome 
plant isin bloom. It was introduced in 1858. 
