208 
CLYII. GRAMINEiE (Stapf). 
[Diectomis. 
back, from 2 to 2-| lin. long. Lower floret represented by a linear- 
lanceolate acute hyaline ciliolate 3-nerved valve, and a linear- 
oblong emarginate hyaline nerveless valvule, over 1 lin. long. Upper 
floret reduced to a linear-oblong hyaline sub-3-nerved valve, which 
passes gradually into a long fine point. — Andropogon fastigiatus , 
Sw. Prodr. 26, and FI. Ind. Occ. 207 ; Hack, in DC. Monogr. Phan, 
vi. 393 ; Durand & Schinz, Consp. FI. Afr. v. 711 ; Hook. f. FI. 
Brit. Ind. vii. 167, 422 ; Rendie in Cat. Afr. PI. Welw. ii. 144; Chiov. 
in Ann. Istit. Bot. Roma, viii. 279. A. Hochstetteri, Steud. Syn. 
PI. Glum. i. 384. A. diatherus , Hochst. ex Steud. l.c. Pollinia 
fastigiata, Spreng. Pug. ii. 13. Heteropogon Hochstetteri, Anderss. 
in Schweinf. Beitr. FI. Aethiop. 306. 
Upper Guinea. French Guinea : Valley of Baffing River, Pobeguin , 1814 ! 
Timbo, very common, Pobeguin , 1781 ! Futa Jallon : between Soumbalako 
and Boulivel, Chevalier, 18647 ! between Dalaba and Sougueta, Chevalier, 
20181 ! Northern Nigeria : Lokoja, Dalziel, 283 ! Abinsi, common bush 
grass, Dalziel, 894 ! 
Nile Land. Sudan : Sennar, Kotschy, 240 ! 302 ! Eritrea : Bogos ; Moc- 
cada, Pappi , 2456 ; Dembelas ; Ferfer, Pappi, 6142. Abyssinia : Begemeder, 
Schimper , 1019 ! 
Lower Guinea. Angola : Pungo Andongo ; banks of the Cuanza River, 
Welwitsch, 7405! between Catete and Luxillo, Welwitsch, 7416! Pedra de 
Cabindo, Welwitsch , 2820 partly ! 
Mozambique Distr. Rhodesia : Salisbury, Allen, 749 ! 
Tropics generally. 
41. ANDROPOGON, Linn. ; Benth. et Hook. f. Gen. PI. iii. 1133, 
partly. 
Spikelets 2-nate, those of each pair differing in sex (except in 11, 
A. homogamus) and mostly also more or less in shape and size, or those 
of the lowest pair of the lowest raceme homogamous ( $ or imperfect), 
one sessile, the other pedicelled on the articulate fragile rhachis of 
many-jointed paired (very rarely solitary) or corymbose (digitate or 
subdigitate) racemes terminating the culms, and, if these be branched, 
also their branches or at least the upper ; raceme-pairs or corymbs 
supported by a spathe or spatheole and frequently collected into a 
false panicle ; the sessile spikelets falling with the contiguous joint 
and the accompanying pedicel ; joints and pedicels filiform or 
thickened upwards (rarely stout in members of § Piestium) and then 
the tips frequently more or less cupular or auricled. Florets 2, lower 
reduced to an empty valve, upper g in the sessile spikelets of the 
heterogamous pairs, <£ , neuter or suppressed in those of the homo- 
gamous pairs and in the pedicelled spikelets (see, however, 10, A. 
humilis, and 11,4. homogamus ) . Sessile spikelets dorsally or laterally 
compressed, nearly always awned : callus short, mostly quite obtuse, 
shortly bearded. Glumes equal or subequal, subcoriaceous to mem- 
branous, the lower flat or concave or channelled on the back with at 
