Dioscorea| X. DIOSCOREACER, 39 
5. D. angustiflora Rendle sp. nov. 
Stem and branches subcompressed not winged, internodes 
glabrous with a few short prickles; leaves opposite, simple, 
glabrous, exceeding the internodes, long-stalked but petioles shorter 
than blades, blades oval from a well-marked cordate base, apex 
shortly acuminate, 7-nerved; male spikes . . .; female spikes 
simple, lax, in axillary fascicles of 3 to 4, bracts shorter than 
the sessile flowers, acuminate from a broadly triangular-ovate 
base, perianth-segments narrow, lanceolate to linear-lanceolate, 
staminodes inserted at their base and about $ their length, con- 
sisting of a broad filament with an aborted anther-like top, style- 
column bluntly conical, ending in 3 shortly recurving stigmas 
ovary triangular not winged. 
Leaf-stalks 2 to 24 in. long, blades 34 to 34 in. by 2 to 23 in. 
broad. Flower-spikes reaching 43 in. long, bracts 1 line long, 
flowers 2 lines long, perianth-segments 1 line, style with stigmas 
+ line. 
* Near D. sativa L, but distinguished by its narrower oval leaves, 
which recall those of D. alata Willd., and by its prickly stem. 
GoLunco ALTo.—Climbing in open woods by streams near Sange. 
No. 4036. 
6. D. alata Willd. Sp. Pl. iv. p. 792 (1805); Kth., dc. p. 387 ; 
Welw. Apont. p. 543 (1859); Durand & Schinz, J.c., p. 273. 
Loanpa.— Cultivated rather rarely in Loanda in the gardens at the 
Museque do Sr. Schut; not yet in flower. March 1854. No. 4030. 
Introduced from Sierra Leone ; cultivated in a garden. May 1854. 
No. 4044. 
7. D. odoratissima Pax, l.c., p. 146; Durand & Schinz, Jc., 
p. 274. 
Go.unco ALTo.—Everywhere, especially in palm woods between 
Sange and Bango Aquitamba and towards Quilombo-Quiacatubia. In 
male fl. and fr. Dec. 1855 and after. Nos. 4035, 4036. CoLL. Carp. 1011. 
Near D. prehensilis Benth. 
8. D. minutiflora Engl. Bot. Jahrb. vii. p. 332 (1886), xv. p. 146 
(laps. multiflora) t. viii. (1893) ; Durand & Schinz, Lc. 
IsLanp oF St. THomas.—No. 4042. 
Represented only by two pairs of leaves ; determination doubtful. 
9. D. Welwitschii Rendle sp. nov. 
Shoots long and whip-like; stem glabrous, apparently terete, 
longitudinally wrinkled when dry ; leaves glabrous, subascending, 
shorter than the internodes, petioles } to 2 the length of the blade ; 
blade 7-nerved, obsoletely trilobed, middle lobe rounded with apex 
abruptly long-apiculate, lateral lobes subrhomboid, base cordate- 
hastate. Internode between the two uppermost leaf-pairs 8 in. 
long. Leaves somewhat ivy-shaped ; petiole 1} to 3 in., blade 4 
to 5 in. long and as broad at the base ; the sharp subulate apiculus 
reaches nearly 1 in. in length. Flowers and fruit absent. 
Gotunco ALTO.—Very thick woods Sobato Quilombo-Quiacatubia. 
Feb. 1855. No. 4041. 
