40 
Of. 
variety albicans which occurs at 4,000-4,500 feet elevation on the river Cuaiquer, 
the lower and higher limits of the species are almost every-where about 4,750 
and 6,500 feet above sea level. It always occurs on the borders of the denser 
mountain forests, which have below them either open or park-like stretches 
covered with low bushes, or coarse savannah grass, and above, the extremely 
humid and almost impenetrable and luxuriant forests that cover the Cordillera 
at that altitude. The mean temperature of the year ranges from about 62° to 
67° Fahr., and the extreme daily fluctuations from 53° to 77°. The hygrometric 
conditions are tolerably uniform throughout the year. Mists and showers are of 
almost daily occurrence, the showers being more copious in the wet season, but 
in the so-called dry season the air is only relatively less humid. Its reproductive 
powers appear to be considerable, as Lenmann estimates that about 75 per cent. 
of the flowers produce capsules in a wild state, and that the seeds germinate 
easily and quickly, though many of the young plants perish. 
The species presents a considerable range of colour variation, from white 
to bright rose, and a large number of forms have received distinctive names, 
though many of them pass into each other by almost insensible gradations. The 
variety here figured has large pure white flowers. The plant from which the 
drawing was made is in the excellent collection of M. DaLiemacne, a French 
amateur of Orchids. 
R. A. Ro.re. 
