212 THE ORCHID REVIEW. (SEPTEMBER, 1916- 
in this particular district, where it is fast becoming rare, but there is, of 
course, the possibility that elsewhere the two parent species grow inter- 
mixed and hybridise. Mr. Potter sent a photograph of the two varieties 
in question, in which the two kinds of lip and the intermediate character 
generally are well shown. The photogragh is here reproduced: It would 
be interesting if someone would repeat the experiment at home, for the 
hybrid is very handsome, and has practically been lost sight of. 
The are several other fleshy-leaved Oncidiums, mostly without pseudo- 
bulbs, and all, so far as we know, are warm-country plants, which grow 
3 
he A 
Fig. 38. ONCIDIUM H#MATOCHILUM 
where there is a very pronounced dry season, during which the plants are 
at rest, hence the charactor affords a good index to the kind of treatment 
required. The genus Oncidium is remarkable for the wide range of 
conditions under which the different species grow, for some require the 
temperature of the warmest house, others that of the Cattleya or Inter- 
mediate house, while a few are as cool growers as Odontoglossums, and 
only succeed with them. O. nubigenum, indeed, is a truly alpine species, 
which was discovered by Jamieson on the Ecuadorean Andes, it is said at 
at elevations of 11,000 to 13,000 feet, hence the specific name, literally, 
** cloud-born,” under which Lindley described it. Later on it was intro- 
duced to cultivation from some 8,000 to 9,000 feet, and Lehmann has since 
met with it on the slop2s of Chimborazo at 8,000 to 10,000 feet. It has 
now practically disappeared from cultivation, probably because the 
necessity for cool treatment has not been realised. The cultivator might 
obtain many useful hints from Orchids from nature. 
