60 
DENDROBIUM Ruckeri. 
Mr. Rucker* s Dendrobium. 
GYNANDRIA MONANDRIA. 
Nat. ord. Orchidaceas. § Malaxed— Dendrobid.e. 
DENDROBIUM. Supra, vol. 15. fol. 1291. 
Sect. Eudendrobium. 
Caule tereti, foliis plants, Jloribus gemellis, labello 
trilobo. 
D. Ruckeri (Lindl. in Bot. Reg. 1843. misc. 38.) j caulibus teretibus, foliis 
ovato-lanceolatis acummatis planis, floribus gemellis, sepalis patulis ob- 
tusiuscubs convexis margme reflexis lateralibus subtriangularibus, labelli 
trilobi lobis rotundatis mtermedio undulato axi elevata villosa. 
• ^ 6 P lesur ^® ptant to be one of Mr. Cuming’s discove- 
ries m the Philippines, although no trace of it is to be found 
among his dried specimens. 
It belongs to the same set as B. Pierardi, among which 
it is one of those with yellow flowers, the others being 
JJ. sanguinolentum , chrysanthum , Cambridgeanum , ruqosum, 
salaccense, Paxtoni, and aureum. Although it mav not be 
quite so handsome as some of these, yet it is a very fine 
species, and perfectly distinct, both in colour, habit, and the 
structure of the flowers. 
Its leaves are exactly lanceolate, very sharp-pointed, and 
a httie disposed to curve backward at the end. The flowers, 
although of a rich yellow nankin colour when expanded, are 
almost white externally ; their lower sepals, which are really 
mate m form, are rolled back at the edge, near the middle, 
so as o oo as if contracted there. The petals and upper 
sepal are nearly of the same size and form, linearly obovate, 
acute and spreading. The labellum is deep orange, with a 
W11 j- 6 ) anC ^ a P a ^ e outside ; when spread flat it is 
roundish obovate, with three rounded lobes, of which the 
