304 Encyclopaedia of Gardening 



Conifers, one of which, occidentalis, is the well-known Arbor Vitae 

 or White Cedar, sometimes grown as a garden hedge. There are 

 numerous varieties of it, among which dumosa (syn. pygmaea), 

 -ericoides, lutea, nana, pendula, argenteo-variegata, and aureo- 

 variegata may be mentioned. Orientalis (syn. Biota orientalis), 

 the Chinese Arbor Vitae, also has many varieties, notably argenteo- 

 variegata, aureo - variegata, elegantissima, pendula, and pygmaea. 

 Dolabrata is a handsome Thuya, and its variegated form is good; 

 these are quite good enough for lawn trees. Gigantea is the largest 

 species, and has several varieties. Thuyas like fertile, well-drained 

 loamy soil. Propagation is by seed in a frame in spring and cuttings 

 in a frame in summer. 



Thyme, Thymus (thy-mus, from thuo, to perfume. Ord. Labiatae). 

 Aromatic shrubs, used both for the kitchen and flower garden. 

 T. vulgaris is the common garden Thyme, and T. citriodorus the 

 Lemon Thyme (see Kitchen Garden Herbs). T. Serpyllum and its 

 varieties albus, white; atropurpureus, purple; coccineus, red; 

 ianuginosus, woolly; and variegatus, variegated leaves, are used 

 as carpeters on the rockery. They are not particular as to soil. 

 Propagation is by seed in spring, also by cuttings and division. 



Thyrsacanthus rutilans (thyrsacan-thus, from thyrse, a thyrse, 

 and Acanthus. Ord. Acanthaceae). A winter-flowering hothouse 

 plant, with scarlet flowers in winter, height about 2 ft. Peat and 

 loam in equal parts, with sand, suit. Propagation is by cuttings 

 in a warm case in summer. 



Tiarella cordifolia, Foam Flower (tiarel-la, from tiara, in reference 

 to the shape of the seed pod. Ord. Saxifrageae). A beautiful 

 hardy herbaceous perennial, with white flowers in feathery racemes 

 in spring, when it is one of the best ornaments of the border or 

 rockery. Peaty soil suits it. Propagation is by division in spring. 

 See the Botanical Magazine, t. 1589. 



Tibouchina (tibouchi-na, a native name. Ord. Melastomaceae). 

 Evergreen shrubs, suitable for the roof of a warm greenhouse or 

 conservatory. Elegans and semidecandra (syn. Pleroma macran- 

 thum), both with purple flowers in summer, are the best; there is a 

 good variety of the latter called floribunda. Loam and peat in 

 equal parts, with sand, suit. Propagation is by cuttings in a close 

 case in summer. 



Tiger Lily (Lilium tigrinum). See Bulbs. 



Tigridia, Tiger Flower (tigrid-ia, from tigris, a tiger, and eidos, like. 

 Ord. Irideae). See Bulbs. 



Tilia, Lime, Linden (til-ia, Virgil's name. Ord. Tiliaceae). See 

 Lime. 



Tillandsia (tilland-sia, after Dr. Tillands. Ord. Bromeliaceae). 

 Hothouse evergreens, with richly coloured leaves and bracts. Peat 

 and loam in equal parts, with sand and small crocks, suit. Propa- 

 ' gation is by suckers in spring. Corallina (syn. Vriesia corallina) , 

 Lindeni, splendens, and tessellata are a few of the best species. 

 There are many handsome hybrids, such as Duchartrei, Rex, and 

 splendida. 



