Thunbergia. Acanthaceæ.
Seeds. Cuttings of firm wood in a frame.
Thunia. Orchideæ.
As the form of the pseudo-bulbs suggests, this genus is easily propagated by cuttings. These are made about six inches long and inserted in pots of sand. After standing in an ordinary propagating-frame or moist stove for a short time young growths will appear at the nodes. When large enough they are taken up and potted in ordinary compost. Two years at least are needed for them to attain to flowering size, but this is the best method where a large number of plants are wanted. (See also under [Orchids].)
Thuya, including Biota (Arbor-Vitæ, White Cedar erroneously). Coniferæ.
Seeds. Layers. Cuttings of green shoots in summer in a cool frame. Cuttings of ripe wood, as recommended for retinospora. The named varieties are often grafted on potted common stocks in winter or early fall.
Thyme (Thymus vulgaris). Labiatæ.
Seeds and divisions.
Thyrsacanthus, Odontonema (Thyrse Flower). Acanthaceæ.
Seeds; cuttings made in spring, and placed in a close, warm frame.