12 cxi. P0LYG0NACE2E. [Polygonum. 
Perianth white, small. Ovary trigonous; style trifid. Nutlet 
trigonous. Hah. Common in ditches, Singapore, Galang; Chan 
Chu Kang, Johor, Batu Pahat; Bukit Muar (Feilding). 
Pahang, Gunong Senyum (Evans). Selangor, Langat; Kwala 
Lumpur, Perak, Ipoh (Curtis). Penang, Balik Pulau; Pulau 
Betong (Curtis). Kedah, Gunong Geriang. Perlis, Chupeng. 
Kelantan, Chaning; Kota Bharu. Distrib. Tropics of Old World. 
var. iypicum. Hairy. 
var. glabratum. Leaves glabrous. 
(4) P. stagninum, Ham. Wall. Pl. As. Par. iii. 56; Hook. fit. 
F.B.I. v. 37. 
Stout plant about 2 or 3 ft. tall, lower part glabrous, upper 
parts and back of leaves strigose silky. Leaves 3 to 5 in. long, 
•5 in. wide, lanceolate long-acuminate narrowed to base; sheaths 
almost or quite covering internodes, strigose. Racemes 2 in. long, 
erect; peduncles strigose. Flowers white. Styles long, slender, 
connate below. Hah. Rare in ditches. Perlis at Kanga (Ridley). 
Distrib. India and Burma. 
Very near P. barbatum, but silky grey, with strigose peduncles and short 
racemes. 
(5) P. flaecidum Meissn. DC. Prod. xiv. 1, 107. 
Stem 4 to 8 ft. tall, or less, simple or branched, glabrous or 
strigose. Leaves lanceolate or elliptic-lanceolate acuminate, very 
many-nerved, glabrous or more or less hairy, 5 in. long, 1 in. wide; 
petioles *3 in. long; sheath much shorter than long internodes 
strigose, mouth with long cilia. Racemes very slender, filiform, 
6 in. long, pendent. Bracts distant with 3 or more very small 
flowers. Perianth pink. Stamens 7 to 8. Ovary trigonous; 
style trifid nearly to base. Nut trigonous. Hab. Wet open spots, 
Pahang River near Pekan. Selangor, Kwala Lumpur (Good- 
enough); Semangkok Pass. Perak, Kota Tampan; Tanjong 
Malim; Kwala Kangsa; Kinta River (Kunstler)^ Kelantan, 
River banks. Distrib. Indo-Malaya. Native names : Kalina Paya; 
Kasum. Use : As an Emmenagogue. 
(6) P. hydropiper Linn. Sp. PI. 360; Gage, l.c. 21. 
Herb, about 18 in. tall or less. Leaves sub-sessile, lanceolate 
or oblong-lanceolate, glabrous, 3 to 4 in. long, *4 in. wide; sheath 
much shorter than internode, shortly ciliate. Spiciform racemes 
2 to 4 in. long, slender. Bracts distant, tubular, glabrous. 
Flowers 2 or more in a bract; pedicels as long. Sepals pink, 
2 outer narrower than the 3 inner. Ovary trigonous; style trifid. 
Nut trigonous. Hab. Damp, sandy spots near river, Pahang, 
River bank. Negri Sembilan, Seremban. Distrib. Cosmopolitan. 
This species is also common in England. 
(7) P. chinense Linn. Sp. PI. 363; Gage, l.c. 22. 
Climber over bushes, several feet long. Leaves stiff, ovate 
