THE FLORA OF THE MALAY· PENINSULA

50 CXXXVI. ORCHIDElE. [Dendrobium.
which is a semi-lunar callus, limb obovate apiculate. Hab. Perak,
no locality given (Kunstler).
(59) D. megaceras Hook. fit. F.B.I. v. 731; Ie. Pl. 2031;
Ridl. Mat. i. 54.
Stems slender, 2 ft. long, internodes 1 to 1'25 in. long. Leaves
oblong-Ianceolate acuminate, 3 to 4 in. long, '75 to 1 in. wide.
Racemes short. Flowers few, 1'5 in. long, yellowish. Sepals
elliptic-oblong blunt; mentum 2 or 3 times as long, cylindric nearly
straight, pinkish. Petals obovate. Lip cuneate, 3-lobed, claw
gradually dilate to limb, an elongate keel at base, side-lobes subtruncate
crenulate, midlobe sub-orbicular retuse crenate. Hab.
Malacca, no locality (Maingay).
Near D. stlb/lavldum Rid!., but the flowers are rather smaller and lip
crenulate ; mentum somewhat clubbed blunt.
(60) D. exilicaule Ridl. D. tenuicaule Ridl. Journ. Roy. As.
Soc. S. Br. 39, p. 73 (not of Hooker).
Stems very slender, weak, 1 ft. long. Leaves linear-Ianceolate,
3 in. long, '25 in. wide. Flower one, '75 in. wide. Pedicel and
ovary '5 in. long. Sepals ovate acute; mentum '75 in. long,
cylindric, tip recurved acute. Petals broad ovate. All pink, tips
darker. Lip clawed, long and narrow, side-lobes broad upcurved,
midlobe ovate shortly bifid, edge crisped, white with pink central
lines. Hab. Lankawi, Ayer Hangat (Curtis).
(61) D. kentrochilum Hook. fit. F.B.I. vi. 731; Ie. Pl. 2030.
Stems rather stout flexuous. Leaves broad elliptic coriaceous
blunt, base very shortly narrowed, 3 in. long, 1 in. wide. Flowers
'34 in. wide, cream colour. Upper sepal ovate blunt, laterals
oblong blunt larger; mentum '36 in. long. Lip obovate slightly
trilobed, claw medium with a retrorse spur. Column arms erect
curved acute. Hab. Very rare. Perak, Batang Padang valley at
2000 ft. altitude (Wray).
Near D. sangltino!entum, but the leaves are quite different, the flower
smaller, and the mentum short.
(62) D. sanguinolentum Lindl. Bot. Reg. 1842; Misc. 73, 1843,
t. 6; Ridl. Mat. i. 55.
Stems fairly stout, 1 to 2 ft. long, flexuous. Leaves lanceolate
sub-acute, 2 in. long, '75 in. wide. Racemes 1 to 1'5 in. long.
Flowers 4 to 6, showy, 1 in. across. Sepals ovate blunt, '2 in.
long; mentum '75 in. long, terete, tip dilate curved. Petals broad
ovate blunt, '5 in. long, all cream colour, tipped violet crimson.
Lip shorter, base narrow with a reflexed spine-like callus, limb
suddenly dilate, quadrate-round, edge waved, cream colour tipped
violet-crimson with a central yellow patch.
var. D. eerinum. D. cerinum Rehb. fil. Gard. ekron. xii. 554.
Flowers entirely yellowish ochre. Both forms grow together on
trees at about 2500 to 3000 ft. altitude. Hab. Selangor, Semangkok
Pass. Penang Hill (Curtis). Kedah Peak. Distrib. Borneo.