1911 Encyclopædia Britannica, Volume 20… (1911)
“ The Moutans or tree paeonies are remarkable for their sub shrubby habit, forming vigorous plants sometimes attaining a height of 6 to 8 ft., and producing in May magnificent flowers which vary in colour from white to lilac, purple magenta, violet and rose. These are produced on the young shoots, which naturally bud forth early in the spring, and are in consequence liable in bleak localities, unless protected, to be cut off by spring frosts. They require to be thoroughly ripened in summer, and therefore a hot season and a dryish situation are desirable for their well-being ”
