Stauropsis.—Stauropsis should be grown with Aërides and Vandas. The genus is best known in gardens by S. lissochiloides (Vanda Batemanii) and S. gigantea.
Stelis.—The plants in this genus possess similar growth to the dwarf Pleurothallis, and require the same treatment.
Stenoglottis.—S. fimbriata and S. longifolia are South African terrestrial Orchids, needing similar conditions to Disa.
Tetramicra (Leptotes).—Dwarf species with white flowers, having rose labellums. Intermediate house.
Thunia.—A section of Phaius with erect, terete stems and deciduous leaves. Grow them in a warm and moist house, but keep them cool and dry during the resting period.
Trichocentrum.—Dwarf, evergreen South American Orchids. Grow in pans suspended in a shady part of the intermediate house.
Trichopilia.—An ornamental, epiphytal genus, including Pilumna, the white, fragrant T. fragrans, and its variety nobilis, representing that section. T. suavis is one of the showiest species. All are worthy of a place in collections. Intermediate house.
Trichosma.—Trichosma suavis is a pretty, cool-house species, with white, fragrant flowers.
Trigonidium.—There are several curious species of Trigonidium, with the sepals usually developed and arranged differently to Orchids generally. Intermediate house.
Vanda.—The genus is one of the largest and most interesting, and, like the other large genera, it may be divided into several sections. The largest-growing and best-known species are V. tricolor and V. suavis, which have white or yellowish flowers, spotted with purple, and without any distinguishing botanical feature between them. V. cœrulea is one of the finest blue Orchids; V. Sanderiana one of the handsomest; V. insignis, V. lamellata, V. Denisoniana, V. limbata, and V. Bensonii are all desirable kinds. V. Kimballiana, V. Amesiana, and V. Watsonii form a distinct section, with fleshy leaves and erect spikes of pretty, white flowers, marked with rose in the two first, and requiring to be grown, where possible, in baskets suspended in the intermediate house. V. teres, V. Hookeriana, and their hybrid V. Miss Joaquim, have erect stems, bearing terete leaves, and fine, rose-coloured flowers. V. alpina, V. cristata, and V. pumila are pretty, dwarf species. All are generally grown together in the warm or East Indian house, but it is an open question whether the keeping of these plants and the Aërides and Saccolabiums continuously in the same house is not the cause of the unsatisfactory condition of many of them in gardens. Each section should be watched, and, when growth is completed, a change should be given to a cool, intermediate house for a couple of months. Aërides, Vandas, and Saccolabiums suffer most from being kept too hot and close in winter. After spring opens the amount of heat and moisture should be gradually increased. Directly they have flowered, the tall plants which have lost their bottom leaves should be lowered in the pots or baskets by being cut off at the base. Dwarf-growing species should be brought well up to the light. V. cœrulea grows well under the most dissimilar conditions, and with it, as with many other Orchids, there is more in finding a suitable place than in growing the plant. All require to be potted or basketed in Sphagnum-moss. Some growers add a sprinkling of leaves. The V. teres section may be planted in Sphagnum-moss in a warm corner of the house, or against the end of the house. If grown in pots, three or four should be potted together and trained to a stout stick or teak rod.