Stelis diffusa C. Schweinfurth sp. nov. 
Herba mediocris, caespitosa. Caules tenues, vaginis 
pluribus tubulatis evanidis obtecti. Folium longe petiola- 
tum; lamina elliptica (rarenter elliptico-linearis), obtusa, 
basi cuneata; petiolus gracilis, canaliculatus. Inflores- 
centiae unicae vel plures, laxiflorae, plusminusve diffusae, 
saepissime quam folium breviores. Flores parvi. Sepala 
basi connata, trinervia, intus pubescentia. Sepalum dor- 
sale elliptico-ovatum. Sepala lateralia subaequalia, dorso 
leviter carinata. Petala minuta, rotundato-obovata vel 
cuneato-subquadrata, apice incrassato late rotundata vel 
subtruncata. Labellum petalis simile, cuneato-subquad- 
ratum, apice late rotundatum et medio minute apicula- 
tum; discus marginibus exceptis incrassatus. Columna 
generis. 
Plant medium-sized, caespitose, up to 25 cm. high. 
Roots numerous, fibrous, filiform, glabrous. Rhizome 
abbreviated. Stem flexuous to suberect, up to 15 cm. 
long, mostly concealed by approximately three tubular 
close evanescent sheaths of which the uppermost is the 
longest. Leaf solitary at the apex of the stem, erect, long- 
petioled, chartaceous in the dried specimen; lamina ellip- 
tic to (rarely) linear-elliptic, up to 9.5 em. long and 2.8 
cm. wide, obtuse with a minutely tridenticulate apex, 
cuneate below, with the mid-nerve prominent beneath; 
petiole slender, channelled, up to 8.5 em. long. Inflores- 
cences one to five, rising from just below the leaf, usually 
shorter than the leaf but rarely a little exceeding the leaf, 
racemose, laxly several- to many-flowered, more or less 
diffuse, up to 11.5 em. long. Flowers small. Sepals con- 
nate at the base, subequal, 3-nerved, pubescent on the 
inner surface. Dorsal sepal elliptic-ovate, up to 3.5 mm. 
long, subacute to obtuse. Lateral sepals similar in shape, 
up to 8 mm. long, subobtuse, lightly carinate without 
along the mid-nerve. Petals minute, cuneate-subquadrate 
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