CXXXVI. ORCHIDEJE. 
43 
Dendrobium.] 
darker central mealy blotch, claw linear-oblong, limb sub-orbicular, 
deeply retuse. Hab. On rocks and trees at high altitudes, Pahang, 
Gunong Tahan; Kluang Terbang (Barnes), Selangor, Bukit Hitam 
(Kelsall). Perak, Gunong Kerbau (Robinson). 
(31) D. Hosei Ridl. Trans. Linn. See. iii. 363; Mat. i. 46. 
Stems over 2 ft. long, flexuous. Leaves lanceolate acuminate, 
very unequally bifid, 3 in. long, -36 in. wide; sheaths 75 in. long. 
Racemes from base of internodes 75 in. long. Flowers 3 or 4, 1 in. 
wide. Bract ovate acute. Sepals white oblong-ovate acute, *5 in. 
long; mentum as long, straight. Petals linear, white. Lip 
ochreous, -36 in. long, side-lobes acute curved, white with brown 
veins, midlobe oblong-reniform retuse, edge waved ciliate with 
3 brown parallel nerves. Column broad, narrowed above. Hab. 
Rare, Pahang, Tahan River. Kedah Peak (Williams). Distrib. 
Borneo. 
(32) D. revolutum Lindl. Bot. Reg. 1840; Mi sc. 51; not Bot. 
Mag. t. 6706; Ridl. Mat. i. 46. 
Stems pendulous, 2 ft. long, -25 in. through, grooved. Leaves 
broad lanceolate thinly coriaceous unequally bilobed, 3 to 3*5 in. 
long, 75 in. wide; internodes *5 to 1 in. long. Flowers solitary, 
75 in. wide on very short peduncle from base of internode. Bracts 
minute ovate acute; pedicel and ovary 75 in. long. Upper sepal 
ovate acuminate, laterals larger, broad ovate; mentum short 
blunt, -36 in. long. Petals lanceolate shorter, all white recurved 
Lip horizontal fleshy, side-lobes short blunt deflexed, midlobe 
oblong-ovate truncate retuse, dull orange with three brown streaks. 
Column white thick narrowed upwards with two broad keels in front. 
Hab. Sporadic, not common. Singapore, Wayang Satu. Johor, 
Batu Pahat. Pahang, Labong Endau (Evans), Malacca, Ayer 
Panas (Hervey). Negri Sembilan, Siliau (Williams). Kedah Peak. 
Distrib. Rhio. 
The type was mixed by Lindley with Griffith’s uniflorum. The narrow 
thin leaves distinguish it from any of the other species. 
(33) D. uniflorum Griff. Notulce, iii. 305; Ic. PI. As. t. 203; 
Ridl. Mat. i. 46. 
Stems about x ft. tall, grooved. Leaves oblong-lanceolate 
■unequally lobed, 1 to 1-24 in. long, 1 in. wide or less; sheaths 
•25 in. long. Flower 1, white, -5 in. across. Peduncle -12 in. long, 
pedicel and ovary over 1 in. long. Sepals oblong acuminate; 
mentum shorter straight. Petals obovate acute. Lip 75 in. long, 
obcuneate, 3-lobed, side-lobes large oblong blunt, midlobe obovate 
bilobed, 2 raised violet ridges on the disc. Column broad flat in 
front with a raised line, arms green. Hab. On trees at 3000 to 
5000 ft. altitude. Pahang, Gunong Tahan. Malacca, Mt. Ophir 
(Griffith and all collectors). Perak, Thaiping Hills. 
The Tahan form has the front of the column elevate green with a depressed 
central line. 
