THE FLORA OF THE MALAY· PENINSULA

Dioscorea.] CLXV. DIOSCOREACEA>.
are variable in shape and size. The commonest form is the variety
ferruginea. Distrib. Cambodia, Malay Archipelago. Native name:
Akar Guluno.
(9) D. myriantha Kunth. Enum. Pl. v. 382.
Slender glabrous unarmed climber. Leaves alternate, thin
ovate-Ianceolate acuminate, base cordate, lobes rounded, 5-nerved,
3 to 3'5 in. long, 1'5 in. wide; petioles slender, 1'5 in. long. Male
panicles slender solitary axillary, 2 to 6 in. long. Spikes numerous
slender, '5 to I in. long, glabrous. Flowers very small; bracts 2,
one ovate-acuminate, inner one !>maller. Perianth urceolate,
'05 in. long; sepals ovate rounded. Petals obovate smaller.
Stamens 6, minute. Female spikes 4 in. long, with distant flowers.
Fruit tranversely oblong, wings rounded, I in. long, 1'5 in. wide.
Hab. Lankawi, Kwala Kwah (Haniff and Nur). Distrib. Philippines.
(10) D. orbiculata Hook. fil. F.B.I. vi. 292; Ridl. Mat. ii.
82. D. sativa Wall. Cat. 5I08c (not of Thunberg).
Stem moderately stout. Leaves thin, glabrous above, reticulate
with stellate hairs on the back, ovate cuspidate, base broad entire,
2 to 5 in. long, 1'5 to 2 in. wide; petioles 2 to 3 in. long, pubescent;
young leaves ovate cordate, 5 in. long, 4 in. wide. Male panicles
I ft. long, pubescent. Spikes in distant whorls of 4 or 5, 3 in. long
or less. Flowers yellow, small; rachis pubescent. Sepals ovate.
Petals oblong. Capsules obovate. Hab. Open country, thickets.
Malacca (Cuming); Sungei Hudang (Goodenough); Batang Malaka
(Burkill). Negri Sembilan, Gemas (Burkill). Perak, Thaiping
and Goping (Kunstler); Tapah (Wray), Sungei Siput (Burkill).
Penang Hill (Curtis, Phillips). Kedah Peak (Haniff). Distrib.
Sumatra, Borneo. . Native name: Akar Kakop.
(II) D. Zollingeriana Kunth. Enum. Pl. v. 384; Ridl. Mat. ii.
82. D. deflexa Hook. fil. F.B.I. vi. 293; Ridl. Mat. ii. 83. D.
tenuifolia Ridl. Journ. Roy. As. Soc. S. Br. 41. p. 34.
A slender climber, base slightly spiny. Leaves opposite or
alternate, thin membranous to thinly coriaceous, glabrous ellipticoblong,
cuspidate, base entire rounded or slightly narrowed; young
leaves cordate, 2 to 4 in. long, 1'75 to 2 in. wide; petioles I in. long.
Male flowers in panicles I ft. long. Spikes 3 to 5 in a whorl, I to 3
in. long, slender, deflexed; rachis and flowers pubescent. Sepals
ovate. Petals narrower oblong. Stamens 6, short. Female
panicle ',much branched. Spikes 18 in. long. Flowers distant.
Capsule rounded transversely oblong, top retuse, I in. long, 2 in.
wide, lobes round. Hab. Woods and forests. Singapore, Bukit
Timan; Garden Jungle (Ridley). Malacca (Maingay). Selangor,
Batu Caves (Burkill). Perak, Larut Hills (Kunstler). Distrib.
Nicobars, Sumatra, Java.
(12) D. gibbiflora Hook fil. F.B.I. vi. 294; Ridl. Mat. ii. 82.
Stem slender. Leaves opposite, thin, glabrous oblong-Ianceo-