30. 
30a. 
on 
31a. 
J: 
32a. 
Rey 
33a. 
34. 
34a. 
a> 
Sd: 
Flowers small in a rather loosely-flowered, often spirally 
twisted rachis; stigmata approximate; lip sagittate at base; 
rostellum linear-subulate .............. 29. Mesadenella 
Flowers medium in an allsided, densely-flowered rachis; 
stigmata confluent or V-shaped; lip conduplicate at base, 
more or less sigmoid; rostellum on each side at base witha 
small lateral tooth ................. 30. Skeptrostachys 
Rostellum very short, discernible only as a thin, trans- 
verse line above the edges of the stigmata, with a distinct 
membranaceous fovea at the tip; if membrane breaks or 
disintegrates in drying, rostellum appears to be emarginate 
SG ee te Lak hae cee 32 
Rostellum as long as, or longer than wide, prominent, va- 
PIOUS RCE i Gh wade vcw au sntaw glass beet 33 
Dorsal sepal free to base of column; petals at most with a 
somewhat oblique base; stigmata approximate to free; 
fovea of truncate rostellum always breaks during drying 
Se OY ee reer ee eee ere er ee 31. Brachystele 
Dorsal sepal partially adnate to column; petals decurrent 
on column-foot; stigmata confluent, subquadrate; fovea of 
rostellum commonly persistent upon drying ............ 
a site een ollie as bse fone epee Lda a oa esdaeinee 32. Microthelys 
Column with an obliquely extended base on top of ovary 
Se ics hn dh at es a os ote eee ecu ace TM 34 
Column with a distinct foot decurrent on side of ovary, 
either manifested externally or completely hidden inter- 
Mito aes ee ack Sees eegaee eee 39 
Lip unguiculate with a sagittate, auriculate or cordate base 
Ieee Lee PEE Se heen Ter eee Te ee ee Te 35 
We eh ENG Seek Kus ba es eA ee eT a OIE 36 
Flowers subglobose; lip cordate, cochleate with a trans- 
verse ridge above base; rostellum trapezoid, emarginate; 
stigmata confluent, reniform ....... 33. Pseudogoodyera 
Flowers elongate; lip never cochleate and without basal 
transverse ridge; rostellum linear-oblong to variously tri- 
angular; stigmata free to approximate ...... 34. Beadlea 
2o5 
