£00) 
floss. 
to brown as they grow older, 11 to 17 inches long, generally drooping when 
wild. The leaves are distichous, oblong or oval-oblong, semi-amplexicaul, obtuse 
and obliquely margined at the apex, of a dark green, 3 to 4 1/2 inches long. 
The flower-spike is short, drooping, 3-5 florous, terminal or almost terminal. 
The bracts short, oval. The flowers odoriferous, generally about 3 inches in 
diameter, pure white, with a large longitudinal orange-yellow blotch on the disk 
of the lip. The sepals are expanded, oblong, acute slightly carinate on the back. 
The petals are much broader than the sepals, almost rounded, the margins 
somewhat wavy. The lip is obovate, more or less expanded, fan-like, forming 
with the base of the column and the lateral sepals a broad obtuse spur half the 
size in length of the dorsal sepal; the lateral lobes slightly prominent, rounded ; 
terminal lobe expanded, retuse at the apex, margins almost entire. 
D. infundibulum Lou., which is special to Tenasserim, has the aspect 
of D. formosum, of which it has even been given as a variety by M. le Comte 
pu Buysson; it may however be distinguished by the leaves which are rather 
narrower and more deeply bi-lobed at the apex; by the sepals which are broader, 
oval-lanceolate and not oblong; by the lip obovate-oblong and not broadly 
obovate, denticulate on the edges, and not the median lobe more deeply bi-lobed, 
the base forming a spur as long as the dorsal sepal, and not half the size 
in length. 
D. formosum gigantewm has all the characteristics of the type, except that 
every part of the plant is more robust; the pseudobulbs are generally erect, 
and the flowers are notably larger, being usually 3 1/2 to 4 1/2 inches in 
diameter and even sometimes attaining 5 1/2 inches. 
This splendid variety was described and figured for the first time by 
Van Hourte in 1865. Our plate has been painted after the plant exhibited by 
M. Knicur, Director of the Royal Parks and Gardens of Laeken, at a Meeting of 
the ORCHIDEENNE held on the 8" of March last, and which obtained a First-Class 
Certificate of Merit. 
Ave: 
