12a. 
12; 
13a. 
14. 
14a. 
15. 
|Sa. 
16. 
l6a. 
Free portion of column inclined; clinandrium basket-like 
with free, lacerate-dentate sides not fused with sides of 
stigmatic CaVIty ....... cece eee eee eens 10. Manniella 
_ Free portion of column suberect; clinandrium infundi- 
buliform with entire sides adnate to column ......... 12 
Flowers very large; rostellum acicular in center of a large, 
deeply bilobed, blunt plate; stigmata confluent ......... 
OEE eee rrr Tee eee en 11. Cybebus 
Flowers never very large, mostly medium to small; rostel- 
lum laminar, without a deeply bilobed plate ......... 13 
Plants miniature with ciliate to hairy leaves, growing on 
branches of trees; lateral sepals didymous to ventricose at 
base; median nerve of sepals always cristate-carinate dor- 
SOU seesaw sevaheaeceetedciapereren eine 12. Eurystyles 
Plants large, aphyllous or with glabrous leaves, terrestrial; 
lateral sepals never didymous at base; median nerve of 
sepals always ecristate dorsally ..........+e+eeeeeeee 14 
Rostellum emarginate; base of lip with marginal thicken- 
ings; plants stout; inflorescence more or less densely many- 
TG WOTERD. ctaccyesvsnnce ces ebereean exe 13. Aulosepalum 
Rostellum entire, triangular; base of lip auriculate to sagit- 
LOAG  ecdewdisecndaneaees er seae eee tae RIO eee es ERhes 15 
Plants stout; eaves, rarely absent during flowering time, 
“with tubular, adpressed, imbricating, vaginate sheaths 
forming a prominent, pillar-like base below spreading 
petioles or blades; rostellum short, triangular with an api- 
cal fovea, easily ruptured; stigmata free to approximate; 
Claw OL 1) SROL ...éscscsevasserioenes 14. Kionophyton 
Plants small, slender; leaves when present, basal without a 
pillar-like base; rostellum without an apical fovea; claw of 
lin rather 1ONe yi seca ne ceaicor sawn as sees aisenys 16 
Plants autogamous with inconspicuous, decumbent rhi- 
zome; leaves basal, present during anthesis; column-foot 
short, oblique on top of ovary; rostellum short, obtuse; 
stigmata free to approximate ...........-. 15. Helonoma 
Plants allogamous with fasciculate, tuberous roots; leaves 
absent during anthesis; column-foot elongate, long-decur- 
rent on side of ovary; rostellum elongate, acute to sub- 
292 
