381 
Outermost involucral bracts not re- 
flexed; leaf bases forming a sheath 
around the stem; S. Trop. Africa : 
Flower heads sessile or subsessile in 
the axils of the uppermost leaves; 
upper leaves linear-lanceolate ; plants 
up to 30 cm. hig - 33. quinquenervia. 
Flower heads eres ara short 
lateral branches; upper leaves nar- 
rowly linear; plants about 1m. high 34. vaginata. 
1. D. Welwitschii O. Hoffm. in ec Bot. Jahrb. 15: 544 
(1893); Hiern in Cat. Afr. Pl. Welw. 1: 613 (1898). 
Tropica, Arrica. Angola: Pungo Andongo; in san ndy 
open woods near Mopopo and Sansamanda, May 1857, Welwitsch 
3609 (type)! Malange, Gossweiler 1211! Kaconda, Gossweiler 
1798! Cubango River, Gossweiler 1867! 3863 ! 
2. D. tomentosa Cass in Bull. Soc. Philom. 1818: 47: Les 
Synop. Composit. 108 (1832); DC. Prodr. 7: 36 (1838); Oliv. & 
Hiern in Oliv. Fl. Trop. Afr. 3: 443 (1877); Hook. f. Fl. Brit. 
Ind. 3: 387 (1881) inel. synonyms; QO. Hoffm. in Engl. Bot. 
Jahrb. 15: 543 (1883); Hiern in Cat. Afr. Pl. Welw. 1: 613 
(1898) : 
Tropical ArricaA. Senegambia: Lamsaar, Leprieur ! French 
Sudan : Sicoro, Chevalier 221a; Ivory Coast, Poisson ! N. Nigeria, 
Moiser 179! 264! Borgu; rocks near the town of Wawa, Barter 
1299! Kouka, in sandy places, Jan. 1854, #. Vogel 30! Katagum 
Dist.; in fields, Dalziel 171! Sokoto, Lely 111! Kafaretti, Oct., 
Lely 676! W. Cameroons, Talbot ! Angola : In sandy mint beds 
about Maianga do Pova, Feb. 1858, Welwitsch .3622! On a 
sandy clay soil, in places flooded in the rainy season, about the - 
Lagéas de Funda, Icolo E. Bengo and Zenza do Golungo, 
Welwitsch 3623! in rough sunny situations near Bumbo, June 
1860, Welwitsch 3990! dry river beds near Mossamedes, 
Gossweiler 641 Loanda, Gossweiler 166! Rattray! Olnkonda, 
1886, Schinz 2009! Eastern Sudan: Kordofan, Kotschy 99! 
Pfund 271! Djika, Pfund 366! Arasch-Cool, Schimper 100! 
Sheikh Talha, Broun 816! Abyssinia: in the mountains near 
Dscheladscheranne, Schimper 724! without precise locality, 
Schimper 426! near Gageros, Schimper 2262! Bogos, Hilde- 
brandt 423! Colonia Eritrea: Bocos, Pappi 4! Kenya Colony : 
Saui, Kassner 758! Ngamiland : Kwebe Hills Hills, Lugard 216! 
Rhodesia : Boruma, Dec., Menyhart 518! Bulawayo and Victoria 
Falls, Eyles 136! Port. E. Africa: Kaimba Island, Kirk! 
Native Name: Dowda (Dalziel). 
Soutu Arrica. Transvaal: Komati Poort, Schlechter 11844! 
Rogers 19532! pga ‘Messina Div.; Zoutpansberg, Rogers 
20993! Pietersburg Div.; The Downs, Rogers 20227! 
Socotra. aed 438! Balfour 228! 
