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. =Tabernæmontana.= _Apocynaceæ._ Increased by green cuttings, under glass, in moist heat. =Tacca=, Ataccia. _Taccaceæ._ Seeds and division of the roots. =Tacsonia.= See Passiflora. =Tagetes= (Marigold). _Compositæ._ Seeds, sown either in-doors or out. =Tamarack.= See Larch. =Tamarindus= (Tamarind). _Leguminosæ._ Young plants may be obtained from seeds sown on a hot-bed or out-doors in tropical countries. Cuttings, in sand under glass in heat. =Tamarix=, Tamarisk. _Tamariscineæ._ Increased by ripe cuttings under glass, the greenhouse kinds in heat. =Tansy= (Tanacetum vulgare). _Compositæ._ Seeds and divisions. =Taxodium=, Glyptostrobus (Bald Cypress). _Coniferæ._ Seeds are usually employed. Layers. Cuttings of young wood in wet sand, or even water, under cover. The varieties of glyptostrobus may be veneer-grafted in August or September on _T. distichum_. =Taxus= (Yew). _Coniferæ._ Seeds, sown when gathered or else stratified. Layers. Cuttings of green-wood under glass in summer, or of mature wood as recommended for retinospora. The named varieties are veneer-grafted in August or early fall upon the upright kinds. =Tecoma= (Trumpet-Creeper). _Bignoniaceæ._ Seeds, layers, cuttings of firm shoots, but most commonly by root-cuttings. =Terminalia= (Tropical Almond). _Combretaceæ._ Seeds; also by cuttings of green-wood under glass. =Ternstrœmia.= _Ternstrœmiaceæ._ Seeds. Cuttings of the half-ripened shoots under glass, in bottom heat. =Testudinaria= (Elephant's Foot). _Dioscoreaceæ._ Grown from imported roots or seeds. =Teucrium= (Germander). _Labiatæ._ Seeds, divisions, and the shrubby kinds by cuttings under cover. =Thalictrum= (Meadow-Rue). _Ranunculaceæ._ Propagated by seeds, and divisions. The varieties by cuttings. =Thea.= See Camellia. =Theobroma= (Cacao, Chocolate-tree). _Sterculiaceæ._ Propagated by ripened cuttings, which should be placed in sand, under glass, in heat. =Thermopsis.= _Leguminosæ._ By seeds and divisions. =Thrift.= See Armeria. =Thrinax.= _Palmæ._ Seeds. =Thunbergia.= _Acanthaceæ._ Seeds. Cuttings of firm wood in a frame. =Thunia.= _Orchideæ._