14 CXXXIII. ORCHIDEH (ROLFE). 
Leaves nerved and plicate. 
Lip spurred or saccate at the base 
Lip not spurred or saccate at the base . 
Leaves coriaceous, conduplicate 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 suberect; rostellum elongate. 
Stems tall, leafy ; leaves plicate; flowers in 
a terminal panicle . 5 5 C 
Stems dwarf; leaves membranous ; flowers 
in erect spikes S : 
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 
leaves 
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 
Key to the Genera, 
Subtribe i. MataxEm, 
Lip superior. 
Leaves distichous, sessile, equitant or rarely terete 
Leaves scattered, petiolate, blade ovate to oblong . 
Lip inferior. 
Anther cells widely diverging, lateral . 
Anther cells parallel . : 
Subtribe ii, DENDROBIEÆ. 
Flowers attached to a cylindrical, sometimes thickened 
rhachis; bracts scattered or subdistichous ; EE 
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 
Subtribe iii. Errex . 
Subtribe v. EULOPHIEÆ. 
Subtribe vi. CYMBIDIE®. 
Subtribe vii. SARCANTHER. 
Tribe 3. NEOTTIEX 
Subtribe viii. VANILLER. 
Subtribe ix, CoRYMBIEZX. 
Subtribe x. SPIRANTHEÆ. 
Subtribe xi. ARETHUSEX. 
Subtribe xii. LIMODORER, 
Tribe 4. OPHRYDER. 
Subtribe xiii. HABENARIER. 
Subtribe xiv. DISES. 
Subtribe xv. CORYCIEÆ. 
1. OBERONIA. 
2. MICROSTYLIS, 
3. ORESTIA. 
4, LIPARIS. 
5. BULBOPHYLLUM. 
6. MEGACLINIUM. 
~T 
. ANCISTROCHILUS. 
