416 CXXXIX. DIOSCOREACEE (BAKER). [ Dioscorea. 
with a distinct campanulate tube and 6 ovate acute segments. Fertile 
stamens 6. Female flowers in long lax racemes. Capsule rigid, 
obovate-oblong, glabrous, 1-1} in. long. Seeds oblong, broadly winged 
all round the nucleus. 
Mozamb. Dist. British Central Africa: Nyasaland; Shire Highlands, 
Buchanan, 173! 158! and without precise locality, Buchanan, 175! 
3. D. sagittifolia, Pax in Engl. Jahrb. xv. 147. Stem twining, 
glabrous. Leaves alternate; petiole reflexed, shorter than the blade ; 
blade triangular-sagittate, acuminate, 4-5 in. long, 24-3 in. broad, 
marked with dense pellucid lines, 5-nerved ; basal lobes obtuse. Male 
spikes geminate, much shorter than the leaves; bracts broad, ovate, 
very small. Perianth campanulate; segments broad, ovate, obtuse. 
Fertile stamens 6, very short. Female flowers and fruit unknown. 
Tropical Africa. Without locality, Lecard, 14. 
Wile Land. British East Africa: Jur; near Okel (Okale), Schweinfurth, 1712! 
No specimen at Kew. 
4. D. hylophila, Harms in Engl. Pf. Ost-Afr. C. 146. Stems 
twining, unarmed, glabrous. Leaves alternate, distinctly petiolate, 
cordate-orbicular, cuspidate, membranous, glabrous on both surfaces, 
6-8 in. long and broad, 9-nerved from the apex of the petiole. Male 
flowers in long very lax peduncled racemes solitary in the axils of the 
leaves; pedicels simple or forked, 2-3-flowered, deflexed; bracts 
lanceolate. Perianth campanulate, glabrous, 1, in. long; segments 
orbicular. Fertile stamens 3. Female flowers and fruit unknown. 
Mozamb. Dist. German East Africa: Usambara; Lutindi, Holst, 3423! 
5. D. macroura, Harms in Notizb. Kéngl. bot. Gart. Berl. i. (1897), 
266. Leaves alternate, distinctly petiolate, cordate-orbicular, 1 ft. long 
and broad, membranous, glabrous, with an undulated margin and a 
subulate apical cusp 14-2 in. long. Male flowers in an ample panicle ; 
racemes lax, reaching 2 ft. in length; lower flowers 2-3-nate ; pedicels 
very short; bracts ovate, minute. Perianth greenish, 4 in. long; 
segments oblong. Fertile stamens 6, very short. Female flowers and 
fruit not seen. 
Upper Guinea. Cameroons: Yaunde, Zenker & Staudt, 414! 
6. D. hirtiflora, Benth. in Hook. Niger Fl. 537. Stems slender, 
twining, unarmed, pubescent upwards. Leaves all alternate, distinctly 
petiolate, simple, cordate-ovate, cuspidate, moderately firm, 14-2 in. 
long and broad, 5-7-nerved from the apex of the petiole, glabrous 
above, grey-pubescent beneath. Male flowers in slender lax axillary 
spikes 2-3 in. long; rhachis very hairy; bracts ovate. Perianth very 
small, hairy ; segments obtuse ; outer ovate, inner oblong. Fertile 
stamens 3. Female flowers and fruit unknown. 
Upper Guinea. Lagos: in forest-roads on the way to Papalaito, Millen, 29 of 
1896 collection! Niger Territory: Nupe, Barter, 561! banks of the River Quorra 
(Niger) opposite Stirling, Fogel, 199! 
Lower Guinea. Angola: Golungo Alto, Welwitsch, 4039 ! 
