Autumn and lasts about a month. Treatment as for O. macranthum. 
There are upwards of 250 species of Oncidium and, while each has a beauty and 
charm of its own, those listed above are the finest of them all. There are also a 
dozen or so natural hybrids as well as a considerable number of artificially crossed 
plants. 
PALUMBINA CANDIDA. Native of Mexico. 
A very distinct, small growing plant with compressed, oblong, smooth, one- 
leaved pseudobulbs, each about 2 inches in height, the leaf being sword-shaped, 
up to 9 inches long and half an inch wide, acute and keeled. The spikes spring 
from the new growths and are erect and nervy, and bear up to half-a-dozen 
flowers each about 14 inches long. The lip is triangular in shape and white with 
a purplish-rose flush in colour. This plant flowers in Spring and lasts about three 
weeks in bloom. Cool treatment is necessary, a bushhouse being suitable almost 
anywhere, though in the South and the cooler parts of Brisbane it will be advis- 
able to put it under glass in the Winter. It needs much drier treatment than 
the Oncidiums and should never have a great deal of water at the roots, though 
a daily leaf spray in Summer is desirable. In Winter keep practically dry, but 
give enough moisture when needed to prevent shrivelling. 
(Syn. Oncidium candidum.) 
ORNITHOCHILUS 
A small genus of epiphytes closely allied to Sarcochilus. They are of botanical 
interest only. There is one local species listed, Ornithochilus Hillii, sometimes found 
in the coastal districts of Queensland. It has a short, rigid stem clothed with 
parallel lines of leaves, each being from 3 to 6 inches long and about an inch wide. 
They produce a number of slender racemes from the axils of the leaves, Each 
carries a number of tiny, drab white or creamy flowers, of interest only to 
botanists and those who specialise in Queensland orchids. 
There are a few Himalayan and Burmese species, but, like our local plant, they 
have very small flowers and are not of particular account. Treatment as for 
Aerides. 
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