418 cxxxix. DioscoREACE^ (baker), [Dioscorea. 



11. D. sansibarensiSy Fax in Engl. Jahrh. xv. 146. Whole 

 plant glabrous. Stems slender, climbing, terete. Leaves opposite, 

 simple, distinctly petiolate, cordate-orbicular, conspicuously cuspidate, 

 2-2J in. long, about 2 in. broad, 7-nerved, bearing large ven-ucose 

 bulbillae in their axils. Male spikes 2-4-nate, 6-8 in. long ; flowers 

 remote ; bracts and bracteoles ovate. Perianth-segments oblong, 

 obtuse. Fertile stamens 6. Female flowers and fruit unknown. — 

 Harms in Engl. Pfl. Ost-Afr. C. 146. 



IKozamba Dlst. German East Africa : Bagaraoyo, Hildebrandt, 1742 ! 

 No specimen at Kcw. 



12. D. prehensilis, Benth. in Hook. Niger Fl. 536. Glabrous in 

 all its parts. Stem slender, woody, twining, sometimes prickly. Leaves 

 usually opposite, distinctly petiolate, simple, ovate, cuspidate, shallowly 

 cordate, 2-4 in. long, moderately firm, 5-nerved from the apex of the 

 petiole, Male flowers in densely fascicled lax spikes 2-3 in. long ; 

 bracts ovate, -very small. Perianth -^^ in. long; segments oblong, 

 obtuse. Fertile stamens 6. Female flowers in lax spikes. Capsule 

 glabrous, 1-lf in. diam., |-| in. long, with three acute lobes. Seeds 

 orbicular, winged all round — D. odoratiasinia^ Pax in Engl. Jahrb. 

 XV. 146. 



Upper Guinea. Sierra Leone, Vogel, 21 ! Liberia, Carder ! Togoland : 

 Bismarckburg, Biittner, 104! Niger Territory : Nupe, Barter, 1057! 1536! by the 

 River Niger at Jeba, Barter ! and at Attah, Vogel, 86 ! Cameroons : Yaunde, 

 Zenker, 329 ! 



Ko-wer Guinea. Island of St. Thomas, Quintas, 105 ! Nevoton ! Gaboon : 

 River Muni, Mann, 1751 ! Congo : Bangala, 1000-1500 ft., Hens, 174 ! and without 

 precise locality. Smith ! Angola : Golungo Alto, Welwitsch, 4035 ! 4036 ! 



South Central. Lunda : Bashilange ; Mukenge, Pogge, 1043. 



nXozamb. Dlst. British Central Africa : Nyasaland, Buchanan, 531 ! 



Var. minutijiora, Baker. Leaves more coriaceous, more orbicular and rarely 

 cordate at the base, usually broadly rounded. — D. minutijiora, Engl. Jahrb. vii. 332. 

 D. multijlora (by error). Pax in Engl. Jahrb. xv. 146, t. 8. 



Upper Guinea. Sierra Leone : near Regent, Scott -JElliot, 4026 ! in bush about 

 Sierra Leone, Scott-Blliot, 4157 ! and near Lester Peak, Scott-Elliot, 4171 ! Ashanti : 

 Assin-Yan-Coomassie, Cummins ! Lagos : Ido Island, Millen, 48 of 1893 collection ! 

 and without precise locality, Moloney I Old Calabar River, Mann^ 2283 ! Cameroons : 

 Mungo, Buchholz, between Barombi and Kumba, Freuss^ 54 ! 



l^o'wer Guinea. Gaboon : Gaboon River, Mann, 975 ! 



Very near D. ahyssinica, Hochst. and perhaps not specifically distinct. 



1?>. D. abyssinica, Hochst. ex Kunth, Enum. v. 387. Whole 

 plant glabrous. Stems slender, twining, unarmed. Leaves often 

 opposite, distinctly petiolate, ovate, acuminate, deeply cordate at the 

 base, distinctly 7-nerved from the apex of the petiole, membranous, 

 3-4 in. long. Male flowers in short lax densely fascicled spikes 1-2 in. 

 long ; bracts ovate, very small. Perianth ^^ in. long ; segments ovate, 

 obtuse. Fertile stamens 6. Female flowers in long lax spikes. Capsule 

 orbicular, deeply lobed, 1-1 J in. diam. Seeds orbicular, winged all 

 round.— A. Rich. Tent. Fl. Abyss, ii. :^>18; Schweinf. in Bull. Herb. 

 Boiss. ii. App. ii. 84. 



