2 
laminae firmae, late lineares, e basi saepe longe attenuatae, apice setaceo- 
acuminatae, ad margines cartilagineos crispae, ad 25 cm. longae, a 
1:3 cm. latae, utrinque tomentellae, superne deinde glabrescentes ; 
costa albida, nervis lateralibus numerosis haud conspicuis. Folia 
caulina vaginis teretibus arctis ad nodos longe copiose barbatis, laminis 
multo angustioribus brevioribusque supra glabris nisi margines versus 
subtomentellis, nervis distinctioribus. Panicula ob ramos suberectos 
minentibus. Valva inferior 7-8 mm. longa; superior late ovata, 
7 mm. longa, pilorum fasciculis 8 in unam seriem transversam dispositis 
barbata et basi pilosa, caeterum glabra; aristae columna 3 mm. longa 
applanata in dorso atro-fusca, glabra, facie in statu torso extra spectante 
albida, adpresse sericea. Antherae 44-5 mm. longae. Sty 4 mm. 
longi; stigmata pallida 2-5-3 mm. longa. 
West Tropica, Arrica: Angola; country of the Benguellas and 
Ambuellas, Gossweiler, 2766, 4053. 
Although the close affinity of Danthoniopsis with Trichopteryx 1s 
beyond doubt, I have not been able to connect it more particularly 
with any of the known species of T'richopteryz. The more herbaceous 
texture of the glumes and valves, the readiness with which the lower 
floret disarticulates, and the peculiar wing-like appendage of the palea 
of the fertile floret seem to separate Danthoniopsis most generally from 
Trichopteryx, while the deeply bifid, transversely bearded valve of 
the fertile floret and its very short and obtuse callus distinguish it 
from almost all the species of Trichopteryx. T. Dregeana and its 
immediate allies alone exhibit a similar structure, but they have on 
Fic. 1, ligule; 2, portion of blade with wavy, cartilaginous margin ; 3, spikelet ; 
4, lower glume; 5, upper glume; 6, g floret; 7, valve of the same; 8, valvule of 
the same ; 9, fertile floret, front view, showing the appendaged keels of the valvule ; 
10, valve of thesame; 11, valvule, front view with lodicules and pistil ; 12, same, 
ack view. All enlarged. 
