14 



CXXXIII. ORCHIDE^ (rOLFE). 



Leaves nerved and plicate. 



Lip spurred or saccate at the tase 

 Lip not spurred or saccate at the base . 

 Leaves coriaceous, condupllcate at the base 

 Pollinia granular or powdery, 



Pollinia free or with apical caudicle and gland ; 



anther case operculate or erect and persistent 



Tall climbers ...... 



Terrestrial herbs. 



Anther erect or subercct ; rostellum elongate. 



Steins tall, leafy; leaves plicate; flowers in 



a terminal panicle .... 



Stems dwarf ; leaves membranous ; flowers 

 in erect spikes .... 



Anther incumbent or suberect ; rostellum 



short or nearly obsolete. 



Stems from an underground tuber ; leaves 



radical ; flowers in leafless scapes, 



usually borne in advance of the 



Stems erect, leafy, from an underground 



rootstock ; flowers in terminal racemes 



Pollinia with basal caudicle and gland ; anther cells 



adnate to the column, and persistent, often 



continuous with the rostellum .... 



Anther erect ...... 



Anther more or less reflexed from the back of 

 the column. 

 Dorsal sepal and petals not cohering; 

 rostellum small .... 



Dorsal sepal and petals cohering into a hood; 

 rostellum greatly developed into a 

 shield-like process over the anther 



Subtribe v. EuLOPHiEiE. 

 Subtribe vi. CTMBiDiEiE, 

 Subtribe vii. Sarcanthe^. 



Tribe 3. NEOTTIEiE. 



Subtribe viii. Vanille^. 



Subtribe ix. Coetmbie^. 

 Subtribe x. Spieanthe^. 



Subtribe xi. AEETHUSEiE. 

 Subtribe xii. Limodoee^. 



Tribe 4. OPHRYDE^. 



Subtribe xiii. HABEHARiEiG. 



Subtribe xiv. DiSE^. 



Subtribe xv. Cortcie^. 



Key to th^ Genera. 

 Subtribe i. Malaxe^e. 



Lip superior. 



Leaves distichous, sessile, equitant or rarely terete 1. Obeeonia. 



Leaves scattered, petiolate, blade ovate to oblong . 2. Miceosttlis. 

 Lip inferior. 



Anther cells widely diverging, lateral . . .3. Orestia. 



Anther cells parallel 4. Lip arts. 



Subtribe ii. Dendrobieje. 



Flowers attached to a cylindrical, sometimes thickened 

 rhachis ; bracts scattered or subdistichous ; sepals 

 subequal ....... 



Flowers and bracts arranged on either side of a 

 dilated and often flattened rhachis ; lateral sepals 

 shorter than the curved dorsal one ; base broad ; 

 apex falcate or reflexed ..... 



5. BULBOPHTLLUM. 



6. Meqaclinittm. 



Subtribe iii. Eeie^ 



7. Ancistbochilits. 



