Dioscorea] x. dioscoreace^. 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 fi'om 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 2i in. long, blades 3i to 3^ in. by 2 to 21 in. 

 broad. Flower-spikes reaching 4|- in. long, bracts 1 line long, 

 flowers 2 lines long, perianth-segments 1 line, style with stigmas 

 ^ line. 



Near D. sat'iva L. but distinguished by its narrower oval leaves, 

 which recall those of D. (data Willd., and by its prickly stem. 



GoLUN(;o Alto. — Climbing in open woods by streams near Sange. 

 No. 4036. 



6. D. alata Willd. Sp. PI. iv. p. 792 (1805) ; Kth., I.e., p. 387 ; 

 Welw. Apont. p. 543 (1859) ; Durand & Schinz, I.e., p. 273. 



LoANDA.— 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, Z.c, p. 146; Dux-and & Schinz, I.e., 

 p. 274. 



GoLUNGO 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. 2)rehensilis Benth. 



8. D. minutiflora Engl. Bot. Jahrb. vii. p. 332 (1886), xv. p. 146 

 (laps, multijlora) t. viii. (1893); Durand & Schinz, I.e. 



Island up 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, 

 shoi-ter than the internodes, petioles ^ to 4; 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. 



GOLUNGO Alto. — Very thick woods Sobato Quilombo-Quiacatubia. 

 Feb. 1855. No. 4041. 



