192 ENUMERATION OF PHILIPPINE PLANTS = 
POLYGONUM BARBATUM Linn. Sp. Pl. (1753) 362; Meisn. in DC. 
Prodr. 14 (1857) 104 (var. vulgare Meisn.); F.-Vill. Novis. App. 
(1880) 172; Vidal Phan. Cuming. Philip. (1885) 187, Rev. Pl. Vasc. 
Filip. (1886) 217; Merr. Fl. Manila (1912) 187, Sp. Blancoanae 
(1918) 185. 
Polygonum stoloniferum Blanco Fl. Filip. (1887) 314, ed. 2 (1845) 
219, ed. 3, 2 (1878) 45. 
Polygonum persicaria Walp. in Nov. Act. Acad. Nat. Cur. 19 (1843) 
Suppl. 1: 407; F.-Vill. Novis. App. (1880) 172; Meisn. in DC. 
Prodr. 14 (1857) 117 quoad “Manila?”, non Linn. 
Northern Luzon to Mindanao, in open, usually wet places at low and 
medium altitudes, ascending to 1,400 m in some regions. India to Africa 
and Malaya. 
Local names: Bukakau (Bik.); kanubstban (Pamp.); kaykaéyu (If.) ; 
saimbangan-tubig (Sul.); sigan-lupa (Tag.); substban (Tag.). 
POLYGONUM BENGUETENSE Merr. in Philip. Journ. Sci. 10 (1915) 
Bot. 301. 
Luzon (Benguet), Merrill 8008, 9682, Phil. Pl. 768, B. S. 13483 Ramos, 
14120 Robinson. In open wet places, altitude 1,200 to 1,500 m. 
The alliance of this species is apparently with Polygonum strigosum R. 
Br. It is represented by Faurie 751, 765 from Formosa and Levine 20, 
218, 1647 from Kwangtung Province, China. 
POLYGONUM CHINENSE Linn. Sp. Pl. (1753) 363; Meisn. in DC. Prodr. 
14 (1856) 131 (var. ovalifolium Meisn.); Mig. Fl. Ind. Bat. 1* 
(1859) 1008; F.-Vill. Novis. App. (1880) 172; Vidal Phan. Cuming. 
Philip. (1885) 137, Rev. Pl. Vasc. Filip. (1886) 217; Merr. in 
Philip. Journ. Sci. 2 (1907) Bot. 272, 3 (1908) Bot. 405, 5 (1910) 
Bot. 346. 
Batan Islands to Mindanao, in thickets and forests at medium and 
higher altitudes, 1,200 to 2,400 m. India to Japan southward to Malaya. 
Local names: Bota-bota (Ig.) ; daynon (Ig.) ; kulangkilang (Neg.) ; lang- 
gigit (If.); lutudan (Bon.); voné (Iv.). 
POLYGONUM CONVOLVULUS Linn. Sp. Pl. (1753) 364; Meisn. in DC. 
Prodr. 14 (1857). 135; Merr. in Philip. Journ. Sci. 10 (1915) Bot. 
302. 
Luzon (Benguet), Merrill 9698, a weed in gardens, altitude about 1,400 
m. A widely distributed weed in temperate countries, a recently introduced 
plant in the Philippines. 
POLYGONUM GLABRUM Willd. Sp. Pl. 2 (1799) 447; Meisn. in DC. 
Prodr. 14 (1857) 114; Merr. & Rolfe in Philip. Journ. Sci. 3 (1908) 
Bot. 97. 
Luzon (Benguet), Elmer 5970, Merrill 7783, Loher 4595, near rice pad- 
dies and in open swampy places, altitude 1,200 to 1,800 m. Tropical and 
subtropical parts of Asia, Africa, and America. 
POLYGONUM HYDROPIPER Linn. Sp. Pl. (1753) 361; Meisn. in DC. 
Prodr. 14 (1857) 109; Walp. in Nov. Act. Acad. Nat. Cur. 19 
(1843) Suppl. 1: 407; Merr. & Rolfe in Philip. Journ. Sci. 3 (1908) 
Bot. 97. 
