Herb-Robert. See [Geranium].
Hesperis (Dame’s Violet, Rocket). Cruciferæ.
The single sorts are increased by seeds; the double forms by carefully dividing the roots, or by cuttings.
Heterocentron. Melastomaceæ.
Propagated by cuttings.
Heuchera (Alum Root). Saxifrageæ.
Seeds. Readily increased by dividing the crowns during spring.
Hevea, Micrandra, Siphonia. Euphorbiaceæ.
Cuttings should be made of half-ripened wood, and inserted in sand under glass.
Hibbertia, including Cyclandra, Pleurandra. Dilleniaceæ.