146 
CLVII. GRAMINEiE (Stapf.) 
[Sorghum. 
Fourn. PL Mex. ii. 56. A. nutans, var. incompletus, Hack, in DC. 
Monogr. Phan. vi. 531 ; Rendle in Cat. Afr. PL Welw. ii. 152. 
Lower Guinea. Angola : Quilanga, in sandy woods, Welwitsch, 2821 ! 
Also in Tropical America, from Mexico to Brazil. 
Imperfectly known species and varieties. 
1. Andropogon Sorghum, var. abyssinicus, Hack, in DC. Monogr. 
Phan . vi. 518 ; Durand & Schinz, Consp. FI. Afr. v. 724. Sessile 
spikelets 2J lin. by 1J lin., the coriaceous basal part black, the 
remainder clay-colour, glabrous, muticous. Grain dark- violet. 
Nileland. Abyssinia : without precise locality, Quartin-Dillon & Petit, 439. 
Probably a form of S. Ankolib. 
2. A. S., var. albidus, Koern. in Bull. Herb. Boiss. ii., App. ii. 12, 
not ii. 226. Panicle erect, contracted, ovate to ovate-lanceolate in 
outline, up to 1 ft. by 2J-4 in. Glumes pale yellow. Grain yellowish- 
white, 2J lin. by 2-2J lin. — Koern. in Baumann, Massailand, 295 ; 
? Chiov. in Ann. Istit. Bot. Roma, viii. 25. 
Nileland. Eritrea : Bogos ; Keren Dari, 5300 ft., Terracciano & Pappi , 
2648 ; Barca ; Agordat, Terracciano & Pappi, 4798. 
Mozambique Distr. German East Africa : Masailand ; Meatu, Baumann. 
Compared by the author with 8. cernuum, Host, but the panicle is less com- 
pact. The type of this variety, a specimen from Ondonga (Schinz !) is 8. Caffro- 
rum (which see). 
3. A. S., var. albofuscus, Koern. in Baumann, Massailand, 295. 
Panicle contracted, branches erect. Glumes reddish-brown. Grain 
white. 
Mozambique Distr. German East Africa : Karagwe ; West Usui, Baumann. 
4. A. S., var. amphibolus, Busse & Pilger in Engl. Jahrb. xxxii. 
184. Panicle lanceolate, 16 in. long, loose ; branches erect. Sessile 
spikelets crowded. Glumes reddish, with involute margins, gradually 
tapering, slightly bearded at the base. Grain much compressed, 
2 1 lin. by 2 lin., reddish, shorter than the glumes. 
Upper Guinea. Togo : Sokode, Kersting, 19, 19a. 
Evidently a form of 8. guineense. 
5. A. S., var. Baumannii, Koern. in Baumann, Usamhara , 318. 
Panicle subumbelliform, open, up to 7 in. by 4 in. ; rhachis stunted ; 
branches obliquely erect, hardly nodding, villous at the base. Sessile 
spikelets crowded, obovate to suborbicular in outline, lj-lf lin. 
long, hairy on the sides, black when mature, awned. Grain obovoid, 
1|-2J lin. long, 1J-2 lin. broad, yellowish-brown, exceeding the 
tightly appressed glumes. — K. Schum. in Engl. Pfl. Ost-Afr. B. 44, 
C. t. iv. figs. J-L ; Busse & Pilger in Engl. Jahrb. xxxii. 186. 
