252 DIOSCOREACEZ (Baker). [ Dioscorea, 
14. D. Tysoni (Baker in Journ. Bot. 1889, 2); stems slender, 
glabrous, sarmentose ; petiole slender, 13-2 in. long; leafivts 5, 
petiolulate, obovate-oblong, distinctly mucronate, glabrous, mem- 
branous, 1-2 in. long ; racemes 2—4-nate, lax, simple, nearly sessile ; 
rachis pubescent ; pedicels 44 in. long, not bracteate at the base ; 
male perianth 4 in. long, campanulate, with a short tube and oblong 
segments. 
Eastern ReciIon : Griqualand East, near Fort Donald, Tyson, 1646! 
II. TESTUDINARIA, Salisb. 
Flowers dicecious. Male perianth campanulate, with a short tube, 
and 6 subequal, spreading, oblanceolate segments. Stamens 6, in- 
serted in the perianth-tube; filaments short, incurved; anthers 
oblong. Style rudimentary. Female perianth smaller, with minute 
staminodes. Ovary 3-celled; ovules 2 in a cell, superposed; style 
very short; stigmas 3, recurved, 2-lobed. Capsule rigid, acutely 
triquetrous. Seeds flat, with a broad apical wing. 
Rootstock a large spherical half-epigzeous tuber ; stems very slender, twining ; 
leaves simple, petioled, alternate ; flowers of both sexes in simple racemes. 
Diste1s, Endemic. 
Leaf cordate-orbicular, not lobed bin és wna eee elephantipes. 
Leaf cordate-deltoid, shallowly 3-lobed oh «. (2) sylvatica. 
1. T. Elephantipes (Burch. Trav. ii. 147); rootstock often 2-3 ft. 
diam., immersed in the lower half only, firm in texture and greyish- 
brown on the outer surface, and deeply areolated ; stems slender, 
glabrous, much branched, twining, the branchlets twining by the 
slender tips ; leaves alternate, shortly petioled, suborbicular, rather 
broader than long, 1-2 in. broad, entire, moderately firm in texture, 
bright green or glaucous, conspicuously mucronate ; male flowers in 
lax shortly-peduncled racemes 2-3 in. long; pedicels erecto-patent, 
equalling or exceeding the flowers, with a lanceolate bract at the base, 
and often a bracteole at the middle; perianth } in. long; segments 
spreading widely ; stamens nearly as long as the perianth-segments ; 
filaments filiform ; anthers oblong or globose, pale yellow, shorter 
than the filaments ; female flowers also in simple racemes ; pedicels 
finally deflexed, +4 in. long ; capsule obuvate-oblong, under an inch 
long; seed with a membranous wing 3 in. long, } in. broad. Lindl. 
Bot. Reg. t. 921; Kunth, Enum. v. 441. Tamus Hlephantipes, 
DP? Herit. Sert. 29; Ait. Hort. Kew, iii. 401; edit. 2. v. 386; Bot. 
Mag. t. 1347. Dioscorea Elephuntopus, Spreng. Syst. iv. cur. post. 
143. Testudinaria montana, Burch. l.c. 148; Lindl. in Bot. Reg. 
.. ub t. 921. Dioscorea montana, Spreng. Syst. iv. cwr. post. 143. 
Coast Rgvion: Uitenhage Div., Ecklon, 788! Zeyher, 583! Alexandria Div. ; 
Hotfmanns Kloof, between Enon and the Zuur Berg Range, 1000 2000 ft., Dréges 
8561! 
CenTRaL Reoton: Alexandsia Div.; on the rocks of Zwartwater Poort, 
$390! Somerset Div.; Bosch Berg, 3500 ft., MacOwan and Bolus, Herb, Norm., 
1214! Mountains on the 8.W. side of Graaff Reinet, Burchell, 2912! Mouutain 
sides near Graaff Reinet, 8000-4000 ft., Bolus, 288! Drage, 8560c! Bowker, 28! 
Kavawari REGION: Orange Free State, Cooper, 905! 906! 
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