trunks and principal branches of the trees where there is partial shade, and 
occasionally in full exposure, but never in the dense primæval forest. 
Associated with it in this locality are O. gloriosum , O. Lindleyanum , and 
O. luteo-purpureum , and it is a noteworthy fact that it has hybridised with each 
of them. With the first it yields O. X Andersonianum and its innumerable 
varieties, including O. X Ruckerianum , O. X Jenningsianunii O. X UmbatuM , 
O. X hebraicum , and a few others. With the second it yields O. X Coradinei , 
and with the third O. X Wilckeanum , both of which are also very variable, and 
by no means rare in cultivation. It is very interesting to observe that the last 
named hybrid has also been raised artificially, thus confirming its parentage. 
It would be very interesting to know the species of insects which visit these 
flowers and thus effect their cross-fertilisation, a point which does not appear to 
hâve been recorded. 
R. A. Rolfe. 
