42 cxxxvi, orchideje, [Dendrobium. 
flattened pseudobulb, 1-5 in. long, 1 in. wide, -25 in. thick, tip of 
stem leafless. Leaves few elliptic-ovate unequally bifid blunt, 1 in. 
long, -25 to 75 in. wide, sheaths 1 in. long. Flowers solitary from 
bare tip, -5 in. long. Upper sepal lanceolate acute, laterals tri¬ 
angular acute; mentum little longer curved blunt. Petals lanceo¬ 
late acute, all white with violet crimson central line. Lip side-lobes 
round white veined violet, midlobe lanceolate acute, tip ciliate white 
with violet crimson bar, callus retuse, yellowish between side-lobes. 
Hab. On trees, Singapore, Kranji; Bajau. Johor, Batu Pahat. 
Pahang, Kwala Pahang. Negri Sembilan, Siliau (Williams)._ 
Perak, Thaiping Hills on Gunong Hijau (Murton); Temengoh 
common. Disirib. Borneo, Java. 
(28) D. crumenatum Swartz, Schrad. Journ. ii. 237; Lindl . 
Bot. Reg. 1839 22 ! Bot. Mag. t. 4013. 
Stems often branched, 3 to 4 ft. long, 4 internodes at base swollen 
into a fusiform pseudobulb 3 in. long, 75 in. through, upper part 
of stem leafless. Leaves broad elliptic stiff coriaceous blunt retuse, 
3 in. long, 1 in. wide, sheaths 1*5 in. long. Flower white produced 
singly from tufts of dry bracts on nude part of stem. Upper sepal 
75 in. long, lanceolate acute, mentum conic curved dilate towards 
tip, 75 in. long. Petals wider and shorter. Lip base oblong, side- 
lobes elongate round, midlobe oblong-ovate cuspidate, keels 3 on disc 
between side lobe, pale yellow papillose patch on midlobe. Capsule 
1 in. long, elliptic. Hab. Common on orchard and roadside trees 
all over the peninsula. Distrib. Burma, S. China, Siam, Malay 
isles. Native names: Poko Merpati; Bunga Angin; Pigeon 
orchid. 
The peculiar habit of all the plants in a district flowering simultaneously, 
the flowers lasting but a day, has attracted the notice of most residents. 
(29) D. bifarium Lindl. Wall. Cat. 2002; Hook. fit. F.B.I. 
v. 732; Ridl. Mat. i. 45. 
Stems tufted, 6 to 12 in. long, channelled. Leaves elliptic- 
oblong unequally bilobed, *5 to 2 in. long, *25 to *36 in. wide. 
Flowers solitary axillary, *5 in. wide expanded, white. Bracts 
minute; pedicel and ovary -5 in. long. Upper sepal lanceolate 
acute, laterals little larger, mentum short blunt, straight. Lip 
entire obovate retuse papillose in centre light yellow. Column 
short thick, arms tooth-like. Capsule 1 in. long, *5 in. through, 
unequally pear-shaped. Hab. On frees in woods, common, Singa¬ 
pore, Selitar; Kranji. Johor, Tana Runto. Pahang, Tahan River. 
Penang (Wallich, Curtis). Distrib. Borneo. 
(30) D. rupicolum Ridl. Journ. F.M.S. Mus. vi. 174. 
Stems 6 to 12 in. tall, *12 in. through, internodes *12 in. long. 
Leaves *25 to -5 in. long, oblong blunt unequally bifid. Flowers 
solitary, -25 in. wide. Sepals oblong-lanceolate pale ochre brown; 
mentum short blunt. Petals smaller. Lip white or light yellow, a 
