H. s. “Ila Herve.” 
H. s. “Jeanne d’Arc.” 
H. s. “Leopold II.” 
H. s. luteolus plenus. 
H. s. ruber florus plenissimus. 
H. s. “Rubis.” 
H. s. “Snowdrift.” 
H. s. “Souv. de Chas. Breton.” 
H. s. speciosissimus. 
H. s. speciosus. 
H. s. variegatus. 
H. s. violaceus. 
HOLODISCUS, Rosaceae. A decorative shrub with plume-like 
panicles of white flowers [nursery]. 
H. discolor. Rock-spirea; B. C. to Calif, and Mont. (Jy.). 
HOVENIA, Rhamnaceae. A small tree with handsome foliage. 
It requires protection when young [3J]. 
H. dulcis. Japanese Raisin-tree; China. 
HYDRANGEA, Saxifragaceae. Hydrangea. Valuable ornamen¬ 
tal shrubs with large clusters of flowers. H. petiolaris is a high- 
climbing, self-clinging vine. H. quercifolia has beautiful oak¬ 
like foliage and white flowers. Unfortunately it is not entirely 
hardy. The leaves of many species are eaten by the Japanese 
beetles [6J]. 
H. arborescens. N. Y. to Iowa (Jn.-Jy.). 
H. a. cordata. Ohio. 
H. aspera. W. China, Himal. 
H. Bretschneideri. N. China (Jy.). 
H. B. glabrescens. 
H. cinerea. N. C. and Tenn. to Ala. (Jn.-Jy.). 
H. c. sterilis. 
H. Domotoi. Hort. origin. 
