14 ENUMERATION OF PHILIPPINE PLANTS aa 
PIPER POLISANUM C. DC. in Philip. Journ. Sci. 11 (1916) Bot. 209. 
Luzon (Ilocos Norte, Bontoc, Apayao, Ifugao), B. S. 19817, 19816 Mc- 
Gregor, 83368 Ramos, 10755 Worcester, 838069 Ramos & Edano. In forests, 
altitude about 1,200 m. Endemic. 
PIPER POLYCLADUM C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 438, 11 
(1916) Bot. 218. 
Luzon (Benguet, Rizal), Williams 1134, B. S. 18396 Ramos, Merrill Phil. 
Pl. 751. In thickets and forests, altitude about 1,200 m. Endemic. 
PIPER PUBERULINODUM C. DC. in Leafl. Philip. Bot. 3 (1910) 778, 
Philip. Journ. Sci. 5 (1910) Bot. 429. 
Mindanao (Davao), Elmer 11972. In forests, altitude about 800 m. 
Endemic. 
PIPER PULOGENSE C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 453, 11 
(1916) Bot. 222. 
Luzon (Benguet), Merrill Phil. Pl. 749, F. B. 16240 Curran, Merritt, & 
Zschokke. In forests, altitude about 2,200 m. Endemic. 
PIPER RAMOSII C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 426, 11 (1916) 
Bot. 211. 
Luzon (Rizal), Panay, Mindanao, B. S. 1755, 13433, 18397, 24982, 22279 
Ramos, 19149 Reillo, 15788 Fénix, 81218, 29645, 29780 Ramos & Edano. In 
forests, altitude about 1,200 m. Endemic. 
Local names: Litlit (Tag.); tugpuan (Buk.). 
PIPER RETROFRACTUM Vahl Enum. 1 (1804) 314; Usteri Beitr. Ken. 
Philip. Veg. (1905) 125, C. DC. in Perk. Frag. Fl. Philip. (1905) 
157 (incl. var. latifoliwm C. DC.), Philip. Journ. Sci. 5 (1910) Bot. 
439, 11 (1916) Bot. 218, Leafl. Philip. Bot. 3 (1910) 776; Merr. 
Fl. Maniia (1912) 170, Sp. Blancoanae (1918) 118. 
Piper parvifolium Blanco Fl. Filip. (1887) 238, ed. 2 (1845) 17, ed. 
3), 1° L877) 32; CDC! Pradrs 16> o(Le62) hole. 
Chavica parvifolia Hassk. in Flora 47 (1864) 59. 
Piper officinarum C. DC. Prodr. 16* (1869) 356; F.-Vill. Novis. App. 
(1880) 175; Vidal Phan. Cuming. Philip. (1885) 138, Rev. Pl. Vasc. 
Filip. (1886) 219. 
Chavica officinarum Mig. Syst. Pip. (1848) 256, Nov. Act. Acad. 
Nat. Cur. 21 (1846) Suppl. 39, t. 34, Fl. Ind. Bat. 1° (1858-59) 444. 
Batan Islands, Luzon, Mindanao, Panay, Palawan. In thickets at low 
altitudes, usually common. Indo-China and the Malay Peninsula to the 
Moluccas. 
Local names: Amaras (Ilk.); boyo-béyo (Tagb.); kamara (Ilk.); ka- 
yungo (Tag.); lilit (Ilk.); litlit (Tag.); sabia (Tag.); salimara (Tag.) ; 
soag-matsing (Tag.); sibon-mandék (Tag.). 
PIPER RHOMBOPHYLLUM C. DC. Prodr. 16% (1869) 352, Leafl. Philip. 
Bot. 3 (1910) 775, Philip. Journ. Sci. 5 (1910) Bot. 438, 11 (1916) 
Bot. 216; Vidal Phan. Cuming. Philip. (1885) 188, Rev. Pl. Vase. 
Filip. (1886) 220. ; 
Chavica populifolia Mig. Syst. Pip. (1848) 248, Fl. Ind. Bat. 1° 
(1858-59) 442, non Piper populifolia Opiz. 
Piper rhombifolium F.-Vill. Novis. App. (1880) 175, sphalm. 
