ON CPD en 
This is another artificially formed genus, being the result of crossing Omcidium 
species and hybrids with Cochlioda species. Cochliodas Noezliana and vulcanica 
and Oncidiums Schlimii, tigrinum and varicosum have figured in most of these 
crosses to date. But, as the new genus attains wider popularity, probably many 
more crosses of interest and beauty will be made. 
Treatment as for Oncidiums. The Oncidiodas like rather warmer conditions than 
the natural species, and are more adaptable to cultural conditions. 
ONCIDIUM and ALLIED GENERE 
This large genus of epiphytical orchids is allied to the Méltonias, and to the 
Odontoglossums, but for the most part the plants of the various species present 
much less difficulty in cultivation than either the Miltonias or the Odontoglots. 
They are found naturally over a wide range of country and their natural con- 
ditions vary so considerably that I feel it will be better to give cultural direc- 
tions for each of the species as they are dealt with, rather than give general 
directions here. 
For compost any fibrous material will serve, and I have had good results with 
osmunda, polypodium and cocoanut fibre. However, I think that a mixture of 
equal parts of osmunda and polypodium fibres gives best results. Ample drainage 
is essential. The following are the best species, any of which will make a hand- 
some and satisfying addition to an orchid collection. 
ONCIDIUM AMPLIATUM. Found from Honduras to Colombia. 
A grand species with large spheroid, flattened pseudobulbs which are bright green 
with a few purple spots when young and turning purplish-black with age. Leaves 
are a foot long and 4 inches wide, very glossy and leathery in substance, and 
green in colour. Flower scape which is long, branched, and, in good plants, many 
flowered, springs from the base of the last matured pseudobulb. Sepals and 
petals small, but the lip is about 14 inches across at the widest part. It is kidney- 
shaped, narrow at the base with two small, lateral lobes, and has a prominent 
two-lobed crest. The sepals are yellow spotted with red, the petals bright yellow 
with a few red spots at the base, the lip also being yellow with red markings at 
the base. The underneath of the flowers is paler than the front. This species 
requires warm treatment at all times. In the warmer parts of Brisbane a glass- 
house will serve, but in the cooler parts artificial heat will be necessary in Winter, 
as the temperature should not be allowed to fall below 55 degrees. It requires 
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