Dioscorea. ] CXXXIX, DIOSCOREACEÆ (BAKER). 419 
Nile Land. Galabat: Matamma, Schweinfurth, 587! 588! Eritrea: Keren 
Steudner, 512! Ginda, at the foot of Donkollo Mountain, 3000 ft., Schweinfurth, 212, 
313. Abyssinia: Tigre ; valleys near Jelajeranne, Schimper, 1720! and without pre- 
cise locality, Roth! British East Africa: Jur; Jur Ghattas, Schweinfurth, 2032 ! 
14. D. schimperiana, Hochst. ex Kunth, Enum. v. 339. Stems 
slender, twining, unarmed, pubescent. Leaves often opposite, distinctly 
petiolate, simple, ovate, acuminate, deeply cordate at the base, mem- 
branous, 5-nerved from the apex of the petiole, slightly pubescent or 
glabrous on both surfaces, 4-6 in. long and broad. Male flowers in 
long lax fascicled spikes with a pubescent rhachis; bracts minute, ovate. 
Male perianth slightly hairy, Je in. long; segments obtuse, ovate or 
oblong. Fertile stamens 6, included. Female spikes long, very lax. 
Ovary densely pubescent. Capsule glabrescent, 14 in. diam., with 
3 acute orbicular lobes and an axis 1 in. long. Seeds orbicular, winged 
all round.—A. Rich. Tent. Fl. Abyss. ii. 317; Engl. Hochgebirgsfl. 
pop. Afr. 171, 
Nile Land. Abyssinia: Tigre; near Jelajeranne, Schimper, 1642! 
Lower Guinea. Angola: Golungo Alto, Welwitsch, 4038! 
Var, vestita, Pax in Engl. Jahrb. xv. 148. Leaves beneath and flowers densely 
pubescent. 
Upper Guinea. Lagos: Otto, Millen, 17 of 1895 collection ! 
Nile Land, Abyssinia: Begemeder ` Senka Berr, on the River Rebb, Schimper ! 
British East Africa: Niamniam; at Gumango Hill, Schweinfurth, 3420! Í 
Lower Guinea. Lower Congo, Laurent! 
Mozamb. Dist. British Central Africa: Nyasaland; by the Mwata Manga 
stream, 4000 ft., Kirk ! Shire Highlands, Buchanan, 112! 266! and without precise 
locality, Buchanan, 778! 1506! 
15. D. (Helmia) dumetorum, Pax in Engl. d Prantl. Pflanzenfam. 
ii. Abt. 5, 134. Stems robust, woody, terete, wide-climbing, sometimes 
prickly. Leaves trifoliolate, moderately firm, glabrescent on the upper 
surface, densely and persistently pubescent beneath ; leaflets obscurely 
stalked, the end one obovate, cuspidate, reaching 5—6 in. long, distinctly 
triplinerved to the apex; side-leaflets very oblique. Male flowers in 
short axillary panicles with dense cylindrical branches; bracts ovate, 
minute, densely pubescent. Perianth campanulate, very small, densely 
pubescent ; tube very short; segments orbicular. Perfect stamens 6, 
included. Female flowers in lax simple racemes. Capsule oblong, 
glabrescent, acutely triquetrous, 14-2 in. long. Seeds oblong, 1 in. 
long, with a large oblong basal wing.—Harms in Engl. Pfl. Ost-Afr. O. 
147. D. demona, Benth. in Hook. Niger Fl. 538, not of Roxb. 
D. triphylla, A. Rich. Tent. Fl. Abyss. ii. 316, t. 96 B, not of Linn. 
D. quartiniana, A. Rich. Tent. Fl. Abyss. ii. 316, t. 96 A. ; Schweinf. in 
Bull. Herb. Boiss. ii. App. ii. 85. D. buchholziana, Engl. Jahrb. vii. 333. 
Helmia dumetorum, Kunth, Enum. v. 436. 
Upper Guinea. Lagos: Abeokuta, Irving, 108! Gold Coast: Aquapim 
Mountains, Vogel ! Niger Territory: Nupe, Barter, 1537! Cameroons: Mungo, 
Buchholz, S 
Wile Land. Eritrea: Ginda, at the foot of Mount Donkolla, 3000 ft., Schwein- 
