80 ORCHIDACEM 



2. Lateral lobes of the labellum well developed, entire, not denticulate. 



a. Column arms basal, bidentate or bilobed at the apex. 



31. D. Clemensce. 



b. Column arms terminal, acute. 32. D. glumaceum. 



3. Lateral lobes of the labellum present but inconspicuous. 



a. Column arms terminal. 33. D. Cobbianum. 



b. Column arms below the middle of the column. 



34. D. Jiliforme. 



4. Lateral lobes of the labellum wanting. 



a. Sepals not caudate-tipped. 



*Labellum denticulate on the margin. 



35. D. malindangense. 

 **Labellum entire. 



fLabellum ecallose. 36. D. Copelandii. 



f fLabellum with a transverse cucullate callus. 



37. D. cucullatum. 

 ft fLabellum with a transverse linear callus. 



38. D. Mearnsii. 

 tttt Labellum bicallose or bicarinate. 



++Labellum spathulate. 39. D. bicallosum. 



++++Labellum oblong, 2 mm. long. 



40. D. graciliscapum. 

 ++++++ Labellum oblong, 5-8 mm. long. 



41. D. longilabre. 



b. Sepals caudate-tipped. 42. D. arachnites. 



1. D. WOODIANUM sp. nov. Herbae habitu caespitosae, a spe- 

 ciebus ceteris in hoc genere facile distinctae absentia lobi medii 

 labelli. Pseudobulbi congregati, perbreves, ± 7 cm. longi, ± 4 

 mm. in crassitudine, pyriformes, in sicco rugosi. Folia valde 

 incrassata, rigida, 3-6 cm. longa, ± 7 cm. lata, oblongi-oblanceo- 

 lata, ad apicem rotundata, ad basim in petiolum sulcatum, 1 cm. 

 longum contracta. Scopus radicalis, gracilis, 6-8 cm. longus, 

 vaginis plurimis, elongatis, tubularibus vestitus. Flores crassi, 

 fusco-rubri, inodorati, distichi, in racemo brevi, lato, ± 2 cm. 

 longo, ± 1.2 cm. lato. Hhachis fractiflexus. Bractece 4 mm. 

 longae, late ovatae. Sepalo later alia oblongi-lanceolata, 7 mm. 

 longa, ± 2 mm. lata. Sepalum dor sale oblongum, 6 mm. longum, 

 obtusum. Petala lanceolata, obtusa, in marginibus minute cilio- 

 lata, 6 mm. longa, 2 mm. lata. Labellum supra bilobatum, sac- 

 catum, saccus scrotif ormis ; lobi labelli erecti, oblongi, rotundati, 



