68 cxxxvr. orchide^. [Bulbophyllim. 
{42) B. trifolium Ridl. Journ. Linn. Soc. xxxii. 278; Mat. 
I 71. 
Rhizome thick; pseudobulbs conoid-ovoid, -25 in. long. Leaf 
lanceolate acute, 6 in. long, 1 in. wide. Peduncle 1 in. long. 
Raceme *5 in. long, sub-capitate; flowers numerous, -25 in. long, 
pink, pubescent. Bracts lanceolate acute, pubescent. Upper sepal 
lanceolate acute, white striped pink, laterals longer oblique acumin¬ 
ate. Petals shorter linear blunt. Lip claw short, limb tongue¬ 
shaped, blunt warty, white pink spotted, central groove crimson. 
Column green, short, a large white tooth on inner face, foot 
long straight, arms long truncate oblong. Hab. Local, Singa¬ 
pore, Sungei Morai. Johor, Tana Runto. Pahang, Pekan 
(Ridley). 
(43) B. lilacinum Ridl. Journ. Linn. Soc. xxxii. 276; Mat. i. 
71; Bot. Mag. t. 8723. 
Rhizome stout, woody; pseudobulbs thick conic, 1*5 in. long, 
1 in. through at base ; petiole -25 in. long. Leaf oblong-lanceolate, 
blunt, 6 in. long, 1 in. wide. Petiole *25 in. long. Peduncle 4 in. 
long, including the dense raceme 3 in. long. Upper sepal lanceolate 
acute, laterals longer, lilac spotted pink. Petals much shorter. 
Lip claw stout, limb lanceolate blunt fiat. Column as long as foot; 
arms lanceolate acute. Hab. Kedah Peak (Ridley). Lankawi, 
Niur Stali (Curtis). Distrib. South Siam. 
(44) B. densiflorum Ridl. Journ. Linn. Soc. xxxii. 277; Mat. 
i- 7 1 - 
Rhizome very long woody; pseudobulbs narrow oblong cylindric, 
1 to 2 in. long, -25 in. through, 6 in. apart. Leaf lanceolate acumin¬ 
ate acute, 1 ft. long, 1-25 in. wide; petiole 1 in. long. Raceme 
dense pendulous, 2 in. long. Peduncle 1*5 in. long. Flowers *5 in. 
long; bracts nearly as long lanceolate. Upper sepal ovate-lanceolate 
mucronate, laterals longer acuminate acute, purplish green with 
darker spots. Petals lanceolate mucronate shorter. Lip tongue¬ 
shaped decurved purple. Column nearly globose, white purple 
spotted, foot free at tip; arms triangular acute. Capsule pear- 
shaped, 1 -5 in. long. Hab. On trees in forests, Singapore, Chan Chu 
Kang; Kranji; Bukit Timah (Ridley). 
(45) B. xanthum Ridl. 
Rhizome long; pseudobulbs distant conic, 75 in. long, with thick 
tufts of roots below each. Leaf stiffly coriaceous lanceolate-oblong, 
7 in. long, 1 in. wide. Raceme 4 in. long, many-flowered. Bracts 
•1 in. long, lanceolate. Flowers *25 in. across, orange and yellow. 
Upper sepal lanceolate acuminate, laterals broad and gibbous at 
base, sub-equal. Petals half as long. Lip as long as sepals entire, 
base shortly narrowed, sides at base elevate, limb curved, fleshy 
linear. Column foot long, arms simple erect. Hab. On rocks at 
800 ft. altitude. Lankawi islands, Dayong Bunting (Robinson). 
Habit of B. lilacinum, but flowers orange, no distinct lobes to lip and 
sepals sub-equal. 
