106 PRESENT-DAY GARDENING 
ing Pilumna, the white, fragrant T. fragrans, and its variety 
nobilis, representing that section. T. swavis 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 with- 
out any distinguishing botanical feature between them. 
V. cerulea is one of the finest blue Orchids ; V. Sanderiana 
one of the handsomest ; V. insignis, V. lamellata, V. Deni- 
soniana, 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 requir- 
ing 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 Aérides and Saccolabiums con- 
tinuously in the same house 1s not the cause of the un- 
