Polystachya.] cxxxin. orchide^ (rolfe). 105 



Plant |-2 ft. high. 

 Flowers puberuloug. 

 Front lobe of lip 

 broad and 

 nearly trun- 

 cate . . 19. P. odorata. 

 Front lobe of lip 



oblong, subacute 20. P. ^hernia. 

 Flowers glabrous or 

 subglabrous. 

 Flowers scarcely 



2 lin. long . 21. P. tessellata. 

 Flowers 2^-3 lin. 



long, green . 22. P. Buchanani. 

 Flowers 3-4 lin. 

 long, reddish- 

 brown . . 23. P. rxifinula. 

 Plant i-| ft. high. 

 Front lobe of lip broad 

 and short. 

 Side lobes oblong, 



acute . . 24. P. zangueharica. 



Side lobes obtuse . 25. P. modesta. 

 Side lobes semi- 



ovate.apiculate 26. P. shirensis. 

 Front lobe of lip lin- 

 ear- triangular or 

 extended. 

 Side lobes trian- 

 gular, free . 27. P. hennettiana. 

 Side lobes rounded, 



free . . 28. P. Steudneri. 

 Side lobes linear, 



free . . 29. P. stauroglossa. 

 Side lobes spathu- 



late, united . 30. P. Stuhlmanni. 

 tfLeaves more or less condu- 

 plicate. 

 Disc of lip slightly verru- 

 cose, with a pair of 

 obscure keels . 31. P. Mannii. 



Disc of lip puberulous, 

 with a high keel at 



the base . . 32. P. gohingensis. 



Chin narrow and more or less 

 elongated. 

 Plant about a foot high . 33. P. ramnlosa. 

 Plant about 6 in. high . 34. P. nitidula. 

 ***Inflorescence racemose, or branched 

 in 36, 39, and 41 ; bracts long, 

 setaceous - acuminate ; flowers 

 1-2 lin. long (plant not turning 

 black in drying). 

 Dorsal sepal obtuse . . .35. P. Busenii. 

 Dorsal sepal acute or acuminate. 



