The remaining species, about eight in all, form a fairly 
natural group, to which the name Grandiflorae could 
still be suitably applied, since in nearly all the species the 
flowers are large in relation to the remainder of the plant. 
But although Kraenzlin does not designate any type spe- 
cies for his sections, the sectional names in most cases are 
derived from the specific epithet of one of the included 
species (this is true of eight of the twelve sections pro- 
posed by him) and these species may reasonably be looked 
upon as the type species of their sections. In considera- 
tion of the fact that P. grandiflora has to be removed to 
sect. Cultriformes, and that the other transferences al- 
ready referred to alter very considerably sect. Grandi- 
Jlorae as conceived by Kraenzlin, it seems better to give 
a fresh name to the residuum. In view of the small stat- 
ure of the species concerned the sectional name Humiles 
seems appropriate. A formal diagnosis is given below. 
Polystachya sectio Humiles Swmmerhayes sect. nov. 
Plantae humiles, usque ad 15 em. altae. Rhizoma+ 
prorepens. Cau/es saepius basi in pseudobulbos proprios 
incrassati, contigul vel distantes, apice 2-8-phylli. Racemi 
simplices, uni- ad pauciflori. Fores pro magnitudine 
plantarum semper conspicui, galeati mento conspicuo, 
glabri vel parce pilosi, interdum siccitate nigrescentes, 
bracteis inconspiculs. 
Species circiter 8 adhuc notae, Africae tropicae et aus- 
trali indigenae. 
Species typica sectionis—P. Ottoniana Reichb. f. 
The new section, which is most closely allied to sect. 
Affines, differs in the smaller average size of the species, 
the marked development of pseudobulbs, the much nar- 
rower and scarcely conspicuous bracts, the much less 
hairy or glabrous flowers and the long and prominent 
mentum. 
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