4& cxxxvi. orchide^. [Dendrobiunt. 
thick, *5 in. long. Petals narrower. Lip white, claw narrow with 
an elevated double ridge meeting at base, blade oblong truncate, 
broad retuse. Column short, broad, arms erect longer than the 
flat orange anther. Hab. Rare, Perak, Thaiping Hills (Derry). 
Distrib. Borneo. 
(50) D. lepidum Ridl. D. hymenopterum Ridl. Mat. i. 52 (not 
of Hooker). 
Stems slender terete or thickened upwards, 1 ft. long, purple, 
internodes short. Leaves linear acuminate, 3 in. long, *25 in. wide. 
Flowers solitary, thin, 1*5 in. wide, 1 in. long. Sepals elliptic 
blunt, white tinted violet; mentum slender acuminate. Petals 
little larger, white. Lip entire spathulate, limb broad round 
truncate, white base and nerves pale yellow, keels 2 connate on 
claw diverging on blade, 2 parallel raised nerves on disc. Column 
greenish white, tip orange. Hab. On trees low down, on mountains 
at 4000 to 5500 ft. altitude. Pahang, Gunong Tahan; K'luang 
Terbang (Barnes); Bukit Fraser (Burkill). Perak, Bujong Malacca. 
Kedah Peak. Lankawi, Gunong Rayah (Curtis). 
(51) D. calicopis Ridl, Journ. Roy. As. Soc. xxxix. 72. 
Stems slender, 1 ft. long, internodes -5 to 1 in. long. Leaves 
lanceolate acuminate, 3 in. long, -5 in. wide. Flowers 1 in. across, 
3 to 4 on pedicels *5 in. long; peduncles as long. Sepals ovate 
blunt, laterals narrower, sub-acute; mentum as long, cylindric 
sub-acute. Petals broader elliptic blunt, all white, tinted rose. 
Lip entire broadly oblong truncate, tip bilobed, lobes short round, 
with 4 raised veins in centre and 2 thinner outside, white, tip rose. 
Column short, arms crimson tooth-like. Anther large ovate pink. 
Hab. Rare. Lankawi islands (Curtis). 
(52) D. hymenopterum Hook. fil. Ic. PI. 2032. 
Stems 9 in. long, moderately stout, flexuous. Leaves broad 
lanceolate sub-acute, base shortly narrowed, 3-5 in. long, 75 in. 
wide. Flowers few, white, tinted rose and green, -5 in. across. 
Upper sepal broad lanceolate blunt, laterals broader triangular 
blunt; mentum *25 in. long, clubbed. Lip, claw long narrow, 
limb rounded-obovate denticulate with 2 short raised semi-ovate 
rings at the base of limb. Column-arms broad oblong truncate 
rounded. Hab. Mountains at 3400 ft. altitude, very rare. Perak 
Gunong Batu Putih (Wray). 
(53) D. roseatum Ridl. Journ. Linn. Soc. xxxii. 261; Mat. 
i- 53 - 
Stems slender, over 2 ft. long, internodes 1 in. long. Leaves 
lanceolate acute, 3 in. long, -5 in. wide. Raceme 1 in. long. 
Flowers 6, rosy white, 1-5 in. long. Sepals *5 in. long, ovate; 
mentum as long, thick tip curved and clubbed. Petals broader 
blunt. Lip with a narrow linear base, blade abruptly quadrate 
crenulate. Hab. Selangor, Gunong Mengkuang Lebah (Robinson), 
Perak, Thaiping Hills (Curtis). 
