256 MR. HENRY RIDLEY ON ORCHIDE® AND 
Denprosium (§ DisTICHOPHYLL®) REVoLUTUM, Lindl., Bot. Reg. 
(1840) Misc., p. 51; Hook. f., Bot. Mag., t. 6706. 
Hab. Johore: Batu Pahat! Native collector. 
Kedah: Kedah Peak! 3,000 feet alt. on low trees. 
Moulmein: Parish. 
Rather a local plant, but abundant ina few places. I have 
never seen it in Singapore. 
D. (§ DisticHopHyLL®) uniFLoRUM, Griff, Notul., iii. p. 305, Ic. 
Pl. As., t. 303. 
Hab. Malacca: Mount Ophir! (all collectors) ; on low trees 
at 2,000-3,000 feet alt. 
Perak : Maxwell’s Hill!. 
I have already (in Trans. Linn. Soc., Ser. II. Bot. iii. p. 363) 
described this species so as to show its distinctness from the 
preceding, with which it has been confused. 
Lindley’s specimens on which he based D. revolutwm were a 
mixture of this species and the last. His plants were received 
from Mr. Barker, of Birmingham (specimen not extant), from 
Messrs. Loddiges; specimen in herb. Lindley is D.. revolutum, 
specimen from “Singapore, Cuming,” is D. wniflorum, Griff., 
and doubtless came from Mount Ophir, where Cuming had 
already collected other orchids. 
D. (§ DisticHopayLu”) meracuitinum, Reichb. f.in Bonplandia, 
iii. (1855) p. 222. ) 
Hab. Malacca: On the tops of lofty trees, R. Derry! Also 
collected by Cuming and Maingay. 
This appears to be a rare plant, but perhaps its habitat makes 
it difficult to obtain. Its flowers are described as “chrome 
yellow,” but this is not the case in the living plants I have 
flowered in Singapore. They were of a bright raw sienna 
colour. 
D. (§ Disticnopnytn®) pirartum, Lindl. in Wall. List, 
n. 2002. D. eacisum, Lindl., Bot. Reg. (1841) Mise., p. 77. 
Hab. Singapore: Tanglin! Toas! Chan Chu Kang ! 
Sirangoon! Often on roadside trees. 
Penang: Wallich. 
The commonest species of the section, with small primrose 
yellow flowers. The description of the lip as having “ 7-9 close 
set ridges” only applies to dried specimens. In a living state 
