cxxv. one HID ACE ^. 675 



Lip distinctly 3-lobed, saccate or 

 spurred at the base ; inflorescence 



strict 13. El'lopiiia. 



Li|) obscurely 3-lobed, wide-ventricose, 

 but not spurred at the base; inflores- 

 cence at first deeurved 14. Geodoklm, 



Epiphytic herbs with long linear sheathing 

 leaves on usually a large fleshy pseudo- 

 bulb ; lobes of the lip embracing the un- 



winged column 15. Cymbidium, 



Stem not pseudobulbous nor tuberous at the 

 base. 



Column prolonged into a foot. 



Spur erect or parallel to the blade of 

 the lip, pointing forwards ; lip adnate 

 to the produced foot of the column ; 

 side lobes of lip erect ; foot of 



column long 16. Sarcociiilus. 



Spur saccate, laterally compressed ; side 



lobes of lip 0; foot of column small . 17. Ruynciiostylis. 

 Spur conical, usually more or less 

 elongated, erect or curved under the 

 midlobe of the lip ; foot of column 



large 18. Brides. 



Column not prolonged into a foot. 

 Lip not spurred nor saccate. 



Leaves terete ; flowers in short 

 sj^ikes ; caudicle of poUinia 



broad 19. LuisiA. 



Leaves lorate ; flowers in racemes 

 withvery long simple or branched 

 peduncles ; caudicle of poUinia 



long, narrow 20. Cottonta. 



Lip spurred or saccate. 



Side lobes of lip large ; flowers 



large 21. Vanda. 



Side lobes of lip small or 0. 



Spurs 2, collateral 22. DiriiOCENTauir. 



Spur or sac single. 



Spur not septate with- 

 in ; flowers corymbose, 

 fleshy, rigid, not flexible. 23. Acampe. 

 Spur septate within ; 

 flowers in extra -axil- 

 lary racemes or panicles, 



flexible 24. Sabcantuus. 



PoUinia powdery or lamellate, never waxy. 



Anther terminal ; poUinia 2 or 4, cohering by their sides, 

 without either gland or caudicle ; leaf solitary, ap- 

 pearing after the flowers ; small terrestrial erect green 



herbs 25, Pogoma. 



Anther posticons, vertical, but inverted ; poUinia 2, or 4 

 in 2 pairs, attached occasionally directly but usually by 

 one cr two caudicles to a single gland. 



Stigma single, anticous ; poliinia 4, short, clavate, 

 inserted without a caudicle on a small elongate 



gland; lip neither clawed nor spurred 26. Spiranthes. 



Stigmas 2, lateral, distant ; poUinia 2, bipartite ; 

 lip clawed beyond the spur or sac ; leaves 

 mcQibranous. 



Sepals free 27. Zeuxine. 



Sepals connate to the middle into a tube 28. CaEiROSTYUs. 



2y2 



