. . . "I tm Ntreatingof this subject 1 will try to confine myself to what may truly be called shrubs, and to omit reference to the many fine floweringplants which attain to the dimensions of trees, such as horse chestnut, lime, wild cherry, c.It is true there are on the border-line such plants as lilacs, Crataegus, species of pyrus, prunus, mag-nolia, and others, which do attain to the size of small tree" .