Inga. Leguminosæ.
Propagated by seeds. Cuttings root with difficulty.
Inula, Elecampane. Compositæ.
Readily increased by seeds or by divisions.
The herbaceous species are increased by seeds and by divisions. The shrubby sorts are increased by cuttings which will root in sand, in a frame.
Ipomœa, including Quamoclit (Moon-flower, Morning Glory). Convolvulaceæ.
All the annual species are grown from seeds. The perennials are also increased by seedage, but they may be raised from cuttings struck in a forcing-house or a frame. The moon-flowers often do better in the north from cuttings than from seeds. I. Horsfalliæ is largely propagated by layers, and other species may be treated in the same way. Division is sometimes employed. I. pandurata can be propagated by root-cuttings. Also grafted (see [page 88]).
Ipomopsis. See [Gilia].