ring full sunlight and well drained soil. For the collector’s gar¬ 
den [nursery]. 
H. multijugum. Mongolia. 
HELIANTHEMUM, Cistaceae. Sun-rose. A genus of low free- 
flowering shrubs for sunny sites and well drained soils. Suitable 
for the rock garden. Require winter protection [5E]. 
H. apenninum roseum. S. Eu. (My.-Jy.). 
H. a. velutinum. 
H. nummularium. Eu., W. Asia (My.-Jy.). 
H. n. mutabile. 
H. n. roseum. 
HELWINGIA, Cornaceae. A shrub of considerable botanical 
interest, having flowers apparently produced from the center 
of its leaves. It lacks hardiness and is of no ornamental value 
PE]. 
H. japonica. China, Japan. 
HIBISCUS, Malvaceae. Shrubby Althea. Large shrubs valued 
for their flowers late in summer, blooming from July to Sep¬ 
tember. They grow well in a variety of soils and tolerate light 
shade. The varieties listed below are all forms of the Rose-of- 
Sharon, H. syriacus, a native of China and India [6B, nursery]. 
H. syriacus albus plenus. 
H. s. amplissimus. 
H. s. anemonaeflorus. 
H. s. carneus plenus. 
H. s. “Coelestis.” 
H. s. “Comte des Flandres.” 
H. s. “Due de Brabant.” 
H. s. “Duchesse de Brabant.” 
H. s. elegantissimus. 
H. s. fastuosus. 
50 
