340 
Supplement 
of ovules. I think it advisable to give an amended account of the 
plant which should come in between Sienomeris and Dioscorea on 
page 313. 
Vol. iv. p. 313, after genus 2, Stenomeris, insert :— 
( 2 a) PERIPETASMA, Ridl. 
A glabrous, half-woody climber. Leaves alternate, oblong 
cuspidate, thin or sub-coriaceous, base blunt or rounded; nerves 
3 to 5 from base, lateral nerves from midrib, 7 or 8 pairs; petioles 
long , in males, shorter in females. Male inflorescence axillary, a 
panicle of very long racemes very numerous. Flowers scattered, 
pedicelled. Perianth lobes 6, lanceolate connate into a short tube. 
Stamens 6, shorter, incurved; anther-cells discrete sub-globose. 
Pistillode at base of tube, triquetrous. Female inflorescence of i 
to 3 axillary racemes. Flowers fewer and much larger than males, 
distant on short pedicels. Perianth-lobes fleshy, connate in a 
short tube. Ovary 3-winged; ovules 2 in a cell. Staminodes 
short; filaments fleshy, thick at the base, narrowed above; anthers 
abortive with the connective prolonged into a short horn. Style 
short and thick. Stigmas 3, forked, with a pair of fleshy curved 
arms to each. Fruit unknown. 
(i) P. polyanthum Ridl.Journ. Boi. 1920, p. 147; Flora Malay 
Pen. i. 103. Dio.scorea stenomeriflora Prain & Bnr kill, Jo urn. As. 
Soc. Beng. n.s. x. 40; Knuth. Pfianzenreich, iv. 43, Dioscoreacece 
p. 310, fig. 58 [bad) ; Ridl. Flora Malay Pen. ; 319. 
Stem 20 to 80 ft. long, purple or green. Leaves in male thin 
papyraceous, 6 in. long, 2 in. wide, base blunt, narrowed entire; 
nerves 3 from base; petioles slender, 1-5 in. long; in female coriace¬ 
ous, base cordate sagittate or rounded, entire; nerves from base 
.5 1 3‘5 fo 10 in. long, 2 to 4 in, wide; petioles stout, -5 to i in. 
long. Male inflorescence panicle i to 3 in. long with 6 or more 
slender racemes 6 to 12 in. long. Flowers distant, greenish-yellow 
spotted, -I in. long. Pedicels as long. Female racemes i to 3 in 
an axil, stouter, 6 in. long, yellow with red spots, tube short, 6-keeled, 
lobes I in. long. Staminodes shorter. Ovary *25 in. long, strongly 
3-winged. Hab. Forests, Singapore, Changi, Selangor, Kwala 
Lumpur, Batu Tiga (Ridley 11,934) males. Perak, Larut Hills at 
500 to 2000 ft. altitude (Kunstler 4160, 5152, 6746), females. 
The foliage of the male plant is so different from that of the 
female that I should have thought they were distinct plants, but 
Prain and Burkill identify them as the males of the Perak plant. 
Vol. iv. p. 317, sp. II, Dioscorea Zollingeriana Ridl. (not of 
Kunih.) note :— 
D. deflexa Hook, fil, Knuth. in Pfianzenreich, iv. 43, Dioscoreaceae, 
points out that this name is antedated by Grisebach, and substitutes 
the name D. Prainiana, Knuth. for it, but D. tenuifolia, Ridl., is 
the same plant as Hooker’s F>. defiexa, a form with thinner and prob¬ 
ably younger leaves. This name therefore should be substituted 
