Symphoricarpus (Waxberry, St. Peter’s Wort, Snowberry-tree, Indian Currant). Caprifoliaceæ.
Seeds, handled like those of blackberries. Also by suckers and cuttings.
Symphytum (Comfrey). Boragineæ.
May be increased by seeds and by division. Also by root-cuttings.
Symplocos, including Hopea. Styraceæ.
Seeds. Cuttings, in sand under glass.
Syngonium. Aroideæ.
Increased by dividing the stems into lengths of about three joints, and inserting them in pots in a brisk heat. The tops of plants may be cut off and inserted as large cuttings.
New varieties and stocks are grown from seeds, which are usually stratified until spring. Green cuttings, handled in frames in summer, are largely used. Cuttings of mature wood will grow; also cuttings of the roots. Layers and suckers are often employed. Varieties are extensively grafted upon privet (Ligustrum), and common lilacs. Flute-budding is occasionally employed. Lilacs will grow for a time when worked upon the ash. Grafting succeeds well when performed in the open air.