713 Gleditsia triacanthos Three-thorned Acacia c.m. 714 --------- v. horrida Strong-spined ditto c.m. 715 --------- v. monosperma Single-seeded ditto c.m. 716 Fraxinus rotundifolia Round-leaved Ash c.m. 717 -------- excelsior v. crispa Curled-leaved ditto c.m. 718 -------- v. diversifolia Various-leaved ditto c.m. 719 -------- v. pendula Weeping Ash c.m. 720 -------- v. striata Striped-barked ditto c.m. 721 -------- v. variegata Blotch-leaved ditto c.m. 722 -------- Ornus Flowering ditto c.m. 723 -------- americana American ditto c.m. 724 -------- chinensis Chinese ditto c.m. 725 -------- rotundifolia Round-leaved ditto c.m. 726 Diospyrus Lotus Date Plum Tree c.m. 727 Diospyrus virginiana Virginian Plum Tree c.m. 728 Nyssa integrifolia Mountain Tupello l.b. 729 ----- denticulata Water ditto l.b. POLYGAMIA TRIOECIA. 730 Ficus Garica Common Fig-Tree c.m. * * * * * FOREIGN HARDY HERBACEOUS PLANTS. In enumerating the foregoing, as well as the plants of the present section, I have had more than one object in view; being desirous to put in only such plants as were ornamental or curious, at the same time to insert none but what are perfectly hardy; yet, independently of this, to make it sufficiently general, to give to such persons who might wish to study plants scientifically, a sufficient number for examples in every genus. For this purpose I have retained a portion of the Umbelliferous and other plants. Although not to be distinguished for their general beauty or appearance, yet they are calculated to afford the student the best plants for comparison, and for that reason I have arranged them according to the Linnaean System. DIANDRIA MONOGYNIA.