Materials for a Flora of the Malayan Peninsula. 29 



arms, very sliort oblong toothed processes at the base. Anther hehnet- 

 shaped apiciihite. 



Perak: (Curtis). Distrib. Borneo. 



5. Dendrobium, Sw. 



Epiphytes rarely terrestrial. Stems elongate, or pseudobulbous. 

 Leaves coriaceous, herbaceous or fleshy. Flowers racemose axillary 

 or siibterminal. Sejials sul)equal, lateral ones adnale to the foot of 

 the column and forming a sac (mentum). Lip adnate to the foot of 

 the column, side lobes erect or rarely spreading, often absent, terminal 

 lobe longer narrow or bi'oad concave or flat. rJostellum entire. An- 

 tlier 2 celled scullshapcd top thickened, attached by the back to a small 

 tooth, on the tip of the column, Pollinia 4, ovoid, or oblong in pairs 

 in each cell. Capsule elliptic or pyriform. 



Species about 300. Tropical Asia to Japan, Australia and 

 Polynesian. 



§ 1. SARCoroDii::\[. Stems short pseu- 

 doljulbous of one or two internodes on a 

 creeping rhizome. Flowers one to several 

 on a terminal raceme. 



Pseudobulb slender crowded one-leafed L 77. Jongirolle. 

 Pseudobulbs distant, short and thick, 

 leaves 2. 

 Lip with two rows of tubercles 

 on midlobe . . . . . . 2. D. longipes. 



Lip with three keels on disc and 2 



ealli on base . . . . . . 3. 7). macropodum. 



Lip with thickened ridges, no ealli 4. D. geminntnm. 



§ 2. BoLBiDiUM. Stems short, tufted, 

 clavate, leaves 3 terminal. Flowers 1 or 

 few from between the leaves, mentum long. 



Stems stipitate' . . . . . . 5. D. qnadrangvlare. 



§ 3. Desmotrichuim. Stems branch- 

 ed, the terminal internode of each branch 

 developed into an ovoid or conic, pseudobulb 

 bearing a single leaf. Flowers few 1-3 at a 

 time from a tuft of bi'acts below the leaf. 



Terminal lobe of lip not broader than 

 the lateral lobes apex bilobed. 



Lip glabrous midlobe oblong base 



broad . . . . . . . . 6. D. lonclwpliyJlum. 



Lip midlobe narrowed above horse- 

 shoe shaped . . . . . . 7. Z). K el sail i. 



Terminal lobe of lip entire bearded 8. D. crimferum. 



