others, P. glomerata, P.longipetala and P. subquadrilabia, 
are here proposed as new. These three species have in the 
past been erroneously included in P. striata. 
A number of species have been described in the genus 
Ponera which subsequently have been correctly referred 
to the genera Scaphyglottis and Neo-Urbania. To make 
the present study complete, all of the concepts correctly 
proposed for the genus Ponera and also those which have 
at one time or another been wrongly attributed to this 
genus have been included with full synonymy. In this 
connection, it was necessary to make several new combi- 
nations and to propose several reductions. 
It was impossible to arrive at satisfactory conclusions 
concerning several of the concepts which have been pro- 
posed; namely P. pellita, P. pleurostachys and P.incon- 
spicua. Consequently, these have been included at the 
end of the paper as doubtful species. 
Ponera Lindley Gen. & Sp. Orch. Pl. (1831) 118; 
in Bot. Reg. 28 (1842) Mise. p. 19. 
Nemaconia Knowles & Westcott Flor. Cab. 2 (1838) 
127. 
Epiphytic or rock-inhabiting plants with creeping rhi- 
zomes. Stems leafy on the upper part, slender or robust, 
terete, reed-like, never pseudobulbous, simple or some- 
times branching. Leaves six or more, alternate, disti- 
chous, linear or narrowly lanceolate. Inflorescence or 
inflorescences composed of short or subsessile racemes 
or a solitary flower, sometimes glomerate or fasciculate, 
terminal or opposite the leaf axils at the nodes of the de- 
foliated stem. Sepals about equal; dorsal sepal free ; later- 
al sepals with the broad base adnate to the foot of the col- 
umn to form a mentum under the lip. Petals longer than 
or about equal to the dorsal sepal, somewhat narrower, 
more or less decurrent on the column. Lip subarticulated 
[ 180 ] 
