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Standard Cyclopedia of Horticulture
Hydrangea rosthornii, Diels. Shrub, to 12 ft.: branchlets strigose: lvs. roundish-ovate or ovate, occasionally ovate-oblong, acuminate, cordate at the base, unequally or doubly fimbriate-dentate, sparingly strigose above, densely grayish strigose and reticulate below, 4-9 in. long and 3-7 in. broad; petiole 1 ½ -4 in. long: cymes 4-7 in. across; sterile fls. 1- 1 ½ in. across, white or purplish; sepals suborbicular or oval, entire or serrate; styles 2. July. W. China.
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