Jalapa. See [Mirabilis].
Jambosa. See [Myrtus].
Jasione (Sheep’s Scabious). Campanulaceæ.
Seeds, sown in spring or fall, usually in the open. The perennials may be divided.
Jasminum (Jasmine, Jessamine). Oleaceæ.
Sometimes by seeds, but usually by cuttings of the nearly ripened wood, under glass. Cuttings of ripe wood are also employed, and layers are often used.
Jatropha. Euphorbiaceæ.
Cuttings made of firm young shoots will strike in sandy soil in a strong bottom heat. The cuttings, if very fleshy, may be dried a few days before setting them.
Jeffersonia. Berberideæ.
Seeds should be sown as soon as ripe, or divisions may be made.