APOSTASIACEZH OF THE MALAY PENINSULA. 237 
ridged, and grooved. The flowers appear singly or in pairs, 
on the short raceme, sunk in a depression in the pseudo-bulb 
below the leaf. They are small and fugacious, yellowish, with 
pink stripes on the sepals and petals. The lip is narrow, 
oblong spathulate, with two thin inflexed narrow lobes; 
terminal lobe bifid, with the lobes oblong and rounded; three 
low ridges run along the lip to the base of the mid-lobe, where 
two converge to a point. The centre of the lip to the epichil is 
crimson, the lateral lobes pink; the terminal lobe is yellow. 
The flowers are very fugacious, lasting but a day. 
Denpropium Keusanu, Ridl., sp. nova. Caules plures aggre- 
gati, 15 poll. longi, teretes, flavi. Pseudo-bulbi 1 poll. longi, 
+ poll. lati, subfusiformes, teretes nec compressi, curvuli, 
politi, flavi. Folia 14 poll. longa, } poll. lata, lanceolata, 
subobtusa, coriacea, canaliculata nec carinata. Ilores parvuli; 
pedicelli (ovario viridi incl.) 3 poll. longi. Sepalum posticum 
ovatum obtusum, lateralia multo majora } poll. longa et lata 
late ovata obtusa; mentum grande, latum, obtusum, in medio 
dilatatum. Petala sepalo postico minora lorata, obtusa, pallide 
viridia. Labelli basis augusta; lobi laterales late, obtusi, 
erecti, virescentes; discus kermesino-purpureus, 3-carinatus ; 
caring subsequales in basi lobi medii terminate ; lobus medius 
hippocrepiformis, rotundatus, 2-lobus ; lobi paralleli, late pallide 
aurantiacei. Columna subrecta, virescens; anthera obtusa ; 
stelidia dentiformia, erecta, acuta. Stigma late oblongum. 
Hab. Selangor: Bukit Hitam, [ieut. Kelsall ! 
Pulau Aor: east coast of Johore, J. Fielding ! 
Perak : Maxwell’s Hill! 
Malacca: Mt. Ophir! 
Kedah: Kedah Peak, Gunong Jerai ! 
This species is common on trees in the hilly districts. It is 
distinguished from D. lonchophyllum, Hook. f., by its slenderer 
form, smaller in all parts, shorter mentum, and horse-shoe 
Shaped mid-lobe of the lip. 
D. conveaum, Lindl., Gen. et Sp. Orch., p. 76; Reichb. f., Xenia 
Orch., ii. p. 73, t. 118, I only know from the author’s figure and 
description. It seems to have a creeping stem emitting roots, 
and the mid-lobe of the lip is longer and narrowed at the base. 
It was collected by Blume at the foot of Mt. Salak, in Java. 
D. xantholeucum, Reichb. f., Xenia Orch., ii. p. 73, t. 118, was 
