This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
(Cercis and phyllon, leaf; the leaves resemble those of Cercis). Trochodendraceae. Tree grown for its handsome foliage and habit.
Leaves deciduous, usually opposite, petioled and palmately nerved: flowers dioecious, inconspicuous, apeta-lous, solitary; staminate nearly sessile, bearing numerous stamens with slender filaments; pistillate pedicelled, consisting of 3-5-carpels, ending in long, purplish styles and developing into about 3/4in. long, dehiscent pods, with many seeds. - One species in Japan and W. China. Hardy, ornamental, shrubby tree of pyramidal and, when young, almost fastigiate habit, with handsome, light green foliage, purplish when unfolding, turning bright yellow or partially scarlet in fall. It prefers rich and moist soil, and grows rapidly when young. Prop, by seeds, sown in spring, and by greenwood-cuttings, taken from forced plants in early spring, or by layers; cuttings from half-ripened wood in summer, under glass, grow also, but not very well.
japonicum,Sieb. & Zucc. Fig. 881.
Fig. 881. Cercidiphyllum japonicum. (X 1/3) a. Leaves abruptly and short-acuminate.
Bushy tree, commonly with several trunks, usually 20-30 ft., but sometimes rising to 100 ft., with slender, glabrous branches: leaves opposite, occasionally alternate, slender-petioled, cordate, orbicular or broadly ovate, obtuse, crenate-serrate, glabrous, glaucous beneath, 2-3 in. long. Japan. G.F. 7:106, 107, and 6:53. Mn. 3:74. Gng. 5:135. F.E. 32:211 (habit). P.G. 2:105. S.I.F. 1:41. -A very desirable tree, one of the best introductions from Japan. variety sinense, Rehd. & Wilson. Tree, to 120 ft., usually with a single trunk: petioles shorter, about 3/4 in. long, somewhat hairy on the veins beneath: caps, gradually narrowed at the apex, 1/2 in. long. W. China. - This recently introduced variety is perhaps still more desirable than the type. It is the largest of all broad-lvd. trees known from China; the trunk is sometimes free of branches for nearly 50 ft. above the ground and attains to 25 ft. or exceptionally to 55 ft. in girth. Alfred Rehder.