334 Flora of the Malayan Peninsula. 
ina single or in a double transverse row. Ovary free, solitary or 
2—4 free ovaries in a transverse row. 
1°. -Receptacle glabrous outside, pubescent inside: 
Male and female receptacles sessile, much 
condensed, elliptic, bilabiate, the female 
receptacle containing a single ovary .. 62. P. pentandrum. 
Male receptacle sessile, distant, elliptic, 
bilabiate i Life .. 63. P. flavimarginatum. 
Female receptacle subsessile, rounded, 
containing a single ovary .. .. 64. P. firmum. 
2°. Receptacle pubescent, outside and inside: 
Male receptacle stipitate, rounded, 3—5- 
androus Bi A -- 65. P. Maingayi. 
Male receptacle elliptic, bilabiate, 2-an- 
drous oe 3c .. 66. P. rarispicum. 
Male receptacle reniform,  bilabiate, 
8-androus We .. 67, P. Schizonephros. 
Female receptacle sessile, elliptic, bila- 
biate, containing 3—4 ovaries .- 68. P. polygamum. 
3°. Species insufficiently known ae .- 69. P. pachyphyilun. 
62. PipER PENTANDRUM, C. DC. in Records Bot. Surv. Ind. VI. 25 
(1912). Scandent. Branches glabrous, dark brown when dry, the 
spiciferous 2 mm. thick; collenchyma libriform in distinct laterally 
widened bundles; a single central lysigenous canal or none; a circle of 
sclerous cells tightly surrounding the peripheric fibro-vascular bundle. 
Leaves glabrous, moderately long-petioled ; limb coriaceous, the 
upper ones 9—12°5 cm. long, 3:5—5 cm. wide, the lower up to 12°5 
em. long and 7:5 cm. wide; elliptic-lanceolate, acutely acuminate, 
the base equilateral, acute ; 7-plinerved, the central nerve emitting 2 
opposite or alternate nerves the uppermost from 10°5—12°5 mm. 
above the base, and having on each side of it 2 ascendent nerves free 
from the base ; petiole about 10°5 mm. long, sheath basal. Peduncles 
glabrous, as long as the petiole. Spike: 3 about 27 mm. long and 
3 mm. thick, densely floriferous; rhachis glandular-asperulate when 
young, later glabrous; receptacles sessile, much condensed, elliptic, 
bilabiate, glabrous outside, hairy inside, woody ; stamens 5, rarely 6, 
anthers ovate, 4-valvate, shorter than the oblong filaments: 9? 
about 27 mm. long and 4 mm. thick; ovary free, glabrous, ovate; 
stigmas 3, elliptic-acute. Berry globose, 5 mm. in diam. 
PERAK : upper land, at 300 ft., Wray 3655 ; Scortechini 114. 
Var. 2. magnifolium C. DC. 1. c. Branches thicker ; collenchyma 
libriform, continuous or nearly so; many peripherous lysigenous 
canals; no sclerose cells round the peripheric fibro-vascular bundles; 
