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APOSTASIACEX OF THE MALAY PENINSULA. 247 
Very common upon trees in the low country. 
There are two forms of this one, the true D. atropurpureum 
of Miquel with deep brownish-red flowers, the other (D. con- 
cinnum, Miq.), with yellow flowers, sometimes, but rarely, 
dotted minutely with deep red. The apex of the lip is ciliate. 
Denprosium (§ AroruM) ATRORUBENS, Ridl., sp. nova. Caules 
9 poll. longi, crassi, haud raro ramosi; radices plures, longs, 
tenues, atrate. Folia 1 poll. longa, 3 poll. lata, approximata, 
lanceolata, acuta, in sicco rufo-brunea. Capztula terminalia, sepe 
magna, $ poll. longa, ? poll. in diam., nutantia. Bractee plures 
vel plurime, 3 poll. long, lanceolate acute, siccw. Flores 
¢ poll. longi, atro-rubentes. Sepalum posticum lanceolatum 
acutum, lateralia majora triangularia; mentum latum, obtusum. 
Petala sepalis breviora, linearia. Labellum lineari-cuneatum, 
rubrum ; lobi laterales breves, dentiformes acuti; apex incras- 
satus, carnosus, atro-rubens, subtus tuberculatus. 
Hab. Kedah: on Gunong Jerai (Kedah Peak) at 3,000 feet 
elevation on stumps and low trees (5,140) ! 
Allied to D. atropurpureum, Miq., but very much larger. 
Some specimens have very large heads of flowers, others much 
smaller. 
The flowers much larger than those of D. atropurpureum, 
Miq., of a very deep red colour. The lip is bent in the middle ; 
it is narrow, with a pair of little lateral lobes and a fleshy 
rounded terminal one, which is thickened and has a tubercle 
beneath. 
D. (§ Aporum) Kerrun, Ridl., sp. nova. Caules sepe 1} ped. 
longi, usque ad # poll. lati, ramosi, debiles. Folia usque ad 
2 poll. longa, 3 poll. lata, lanceolata, acuminata, falcata, acuta 
(texture D. grandis); vagine admodum compresse. Capitula 
plura, axillaria, } poll. longa; bractese plures, siccw. Flores 
3 poll. longi, breviter pedicellati. Sepalum posticum ovatum 
obtusum purpurascens, lateralia latiora; mentum sepalis multo 
longius, curvum, obtusum. Petala sepalis breviora, lanceolata, 
obtusa. Labellum cum sepalis vix squilongum, cuneato- 
spathulatum, apice bilobum; lobi rotundati, minute denticulati, 
involuti basi elevatim 3-nervosi, apice pluri-nervosi; callus 
0. Columne pes longus, excavatus. Anthera lata, pileata, in 
margine recta integra. 
Hab. Siam: Bangtaphan, Dr. Keith! Pungah, C. Curtis ! 
