382 ORCHIDS. 
middle, the apex spreading and flat, rin. broad; colour 
variable, but usually rosy at the base and violet on the 
broad part. The flowers remain fresh about a month. The 
plant requires moist, tropical treatment, except during two 
or three winter months, when a dry position in the inter- 
mediate house is best. It should be planted in well- 
drained baskets or pans, in a mixture of peat and sphagnum, 
It likes a very high temperature whilst making new growth. 
Unfortunately, it is often badly affected by spot, and soon 
gets too weak to make good growth. It flowers usually 
in summer. A native of British Guiana; introduced in 1834. 
Botanical Register, t. 1887. 
0. leucochilum.—An old favourite, of noble habit, 
beautiful in flower, and showing considerable variation. 
Pseudo-bulbs ovate, flattened, furrowed, 2}in. long, one- 
or two-leaved. Leaves gin. long, 1in. broad, pointed and 
recurved. Flower-spikes long, arching, panicled; flowers 
numerous, 2in. across, with equal sepals and petals, oblong 
in shape, tin. in length, and coloured yellow-green, with 
blotches of dark brown; lip kidney-shaped, #in. across, 
with a red, stalk-like base, the blade two-lobed, pure white, 
turning to yellow with age, the two small lateral lobes 
also. white; crest composed of several parallel ridges. 
The colours vary in different plants. This species blossoms 
at various times, and lasts for several weeks in beauty. It 
requires cool-house treatment, and, being a strong grower, 
thrives best when planted in a pot in a mixture of peat 
and sphagnum. It requires water all the year round. A 
native of Mexico and Guatemala; introduced in 1835. 
Syn. O. digitatum. 
Bateman’s Orchids of Mexico and Guatemala, t. 1. 
0. macranthum.—This species ranks with the very best 
garden Orchids. It is a robust grower, thrives in a cool 
