Hydrangea macrophylla subsp. macrophylla

Read about Hydrangea macrophylla subsp. macrophylla in the Standard Cyclopedia of Horticulture

Hydrangea opuloides, Koch (H. hortensis, Smith. H. hortensia, DC. H.japonica, Sieb.). Shrub, to 8 ft., almost glabrous: lvs. ovate or ovate-elliptic, acuminate or acute, coarsely serrate, 5-8 in. long: fls. in large cymes without bracts, white, bluish or pink, few or all of them sterile.—The greenhouse hydrangea. June, July, but blooming in winter under glass. A large number of varieties have been intro. from Japan and China, where this species has been extensively cult, for many centuries, and where it is native. The following are some of the beat known. They may be divided into 3 groups: (1) Japonica group: cymes flat, with sterile and fertile fls. (2) Hortensia group: cymes globose, with almost all fls. sterile. (3) Stellata group: fls. with many narrow sepals. The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.