Perotis| XXVIII. GRAMINEAE. 211 
culms ascending, distichously leaved, distantly sheathed above, spikes 
barley-like, shining whitish-yellow, barbs]spreading at mid-day, but 
soon contracted. Plentiful in sandy wooded places between Sansa- 
manda and Mopopo on the right bank of the Cuanza ; April 1857. 
No. 7424. Panicle narrowed in the day-time expanded in the evening, 
Common in sandy woody places near Sansamanda; 1 May 1857. 
No. 2732. 
Huitia.—A cespitose grass, culms prostrate to ascending, spikes 
Alyoswrus-like purplish. Very common on low thicket-grown sandy 
ae ae edges of woods near Monino; April and May 1860. 
0. ; 
Trine vi. AVENE. 
40. AVENA L. ; Benth. & Hook. f. Gen, Pl. iii. p. 1160. 
1, A. uniflora Parl. Pl. Nov. v. Min. Not. p. 84 (1842); Webb 
& Berth. Hist. Nat. Canar, iii. p. 401, t. 248; Steud. Syn. Pl. 
Gram, p. 231 (1854); Durand & Schinz, Consp. Fl. Afr. v. p. 843. 
Huiitia.—Sandy thickets near the banks of the river Monino, but. 
rarely met with ; April 1860. No. 7509. 
41. DANTHONIA DC.; Benth. & Hook. f. Gen. Pl. iii. p. 1162. 
1. D. Forskalii R. Br. in Denham & Clapp. Trav. & Disc. in N. 
& Centr. Afr. App. p. 244 (1826); Trin. Gram. Icon. & Deser. 
i. t. 49 (1828); Steud. Syn. Pl. Gram. p. 244 (1854); Durand 
& Schinz, Consp. Fl. Afr. v. p. 850. 
D. glauca Nees Fl. Afr. Austr. p. 327 (1841). 
MossaMEvES.—Coarse sandy places near the sea, to the south of 
Mossamedes, but rather rare. Praia da Amelia; July 1859. No. 2294. 
2. D. mossamedensis Rendle sp. nov. 
Perennial by a stout woody rhizome, culms erect or sub- 
ascending below, unbranched, suffruticose; leaf-sheaths striate, 
glabrous below, becoming scabridulous above, shorter than the 
densely, shortly pubescent internodes ; nodes reddish, glabrous ; 
ligule short, densely hairy; blades about equal to or slightly 
exceeding the sheaths, linear-tapering, becoming convolute, apex 
setaceous, more or less scabridulous on the lower, striate and 
sparsely shortly pilose on the upper face; panicle strict, inter- 
rupted, branches short, suberect, densely spiculiferous to the 
base, rhachis, branches, and pedicels shortly pubescent ; spikelets 
2 in. long, barren glumes subequal, exceeding the flowers, 
lanceolate, acute, rigidulous, membranous, 9- and7-nerved, flowers 6, 
becoming smaller upwards, rhachis-joints obliquely acute, lowest 
fertile glume elliptical, concave, 7-nerved, bilobed at the apex, lobes 
weakly setigerous, bearing a dorsal line of dense white hairs 
about 3 below the tip; pale much flattened, nerves strong, 
minutely ciliolate, ovary glabrous. 
Plants 2 to 23 ft. high ; root-fibres stout ; leaf-sheaths, except 
the uppermost (5 in.), 14 to 3} in. long, blades # to 32 in. long, 
1 to 14 lines broad at the base, ligule ? line long. Panicle 6 to 
9 in. long, 1 in. or less across, lowest. branches 14 to 1? in. long, 
