The only truly hardy species of this quite extended family is known as Hydrangea panic-ulata grandiflora. (Fig. 99.) It is hardy even in Minnesota, but it does not endure protracted drought as well as most other shrubs. Its great panicles of remarkably durable flowers show to best advantage when planted quite thickly in front of banks of shrubbery. It is also useful for groups in certain positions and as single specimens.
Fig. 99. - Hardy hydrangea (Hydrangea paniculata grandiflora). (After Maynard.)
With some protection in winter, or as grown in large pots sunk in the lawn in summer and kept indoors in winter, such varieties of the Japan hydrangeas as Hortensia and Thomas Hogg are much used for lawn decoration. In the South these fine varieties are hardy without winter protection.