Hamelia. Rubiaceæ.
Seeds. Cuttings which are nearly ripe will root during the early part of summer under glass, with heat.
Hamiltonia, Spermadictyon. Rubiaceæ.
Seeds. Half-ripened cuttings, placed in sand under glass.
Hardenbergia. Leguminosæ.
Seeds may be used; also increased by divisions. Cuttings, made of the firm young side shoots in spring, will grow if inserted under a bell-glass, and placed in a warm frame or pit, without bottom heat.
Hardwickia. Leguminosæ.
Propagated by ripened cuttings in sand, in a strong heat.
Harebell. See [Campanula].
Hatchet Cactus. See [Pelecyphora].