Vol. 2 PIPERACEAE 13 
Negros, Elmer 9456. In forests, altitude about 1,200 m. Endemic. 
Local name: Buyok-btyok (C. Bis.). 
PIPER OBOVATIBRACTEUM C. DC. in Leaf. Philip. Bot. 3 (1910) 784, 
Philip. Journ. Sci. 5 (1910) Bot. 447, 11 (1916) Bot. 221. 
Central Luzon to Mindanao. In forests at medium altitudes. Endemic. 
Local name: Dumadingan (Lan.). 
PIPER OVATIBACCUM C. DC. in Leafli. Philip. Bot. 3 (1910) 782, Philip. 
Journ. Sci. 5 (1910) Bot. 445, 11 (1916) Bot. 220. 
Piper robinsonii C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 445. 
Central Luzon to Mindanao, in forests at medium altitudes. Endemic. 
Local names: Buyo-hayo (P. Bis.); diltit (Ig.); litlit (Tag.); litlit- 
matsing (Tag.); mapoua (Buk.). 
PIPER PALAWANUM C. DC. in Philip. Journ. Sci. 11 (1916) Bot. 210. 
Palawan, B. S. 15573 Fénix. On trees along the seashore. Endemic. 
PIPER PARCIRAMEUM C. DC. in Leafl. Philip. Bot. 3 (1910) 781, Philip. 
Journ. Sci. 5 (1910) Bot. 445. 
Mindanao (Davao), Elmer 11274, 10899. In forests, altitude about 900 
m. Endemic. 
Local names: Poruan (Bag.); salimbangon (Bag.). 
PIPER PAUCINERVE C. DC. in Perk. Frag. Fl. Philip. (1905) 156, Philip. 
Journ. Sci. 5 (1910) Bot. 456. 
Luzon (Isabela), (Warburg 11929). Endemic. 
PIPER PENNINERVE C. DC. in Perk. Frag. Fl. Philip. (1905) 157, Philip. 
Journ. Sci. 5 (1910) Bot. 440, 11 (1916) Bot. 218. 
Luzon to Mindanao, B. S. 13857 Ramos & Edano, 23557 Ramos, 15230, 
24284, 28892 Fénix, 11818 Robinson, Wenzel 2, 874, 719. In forests at 
medium altitudes. ' Endemic. 
PIPER PETRAEUM C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 430. 
Luzon (Benguet), Hlmer 64380, Sandkuhl 158. In thickets. Endemic. 
PIPER PHILIPPINUM Mig. Syst. Pip. (1843) 322, Fl. Ind. Bat. 1°" 
(1858-59) 453; C. DC. Prodr. 16* (1869) 348, Philip. Journ. Sci. 
5 (1910) Bot. 487; F.-Vill. Novis. App. (1880) 175; Vidal Phan. 
Cuming. Philip. (1885) 138, Rev. Pl. Vasc. Filip. (1886) 219. 
Luzon (Rizal, Tayabas, Albay), Samar, Leyte, Cuming 912, B. S. 24184, 
26205 Ramos, 29127, 29131 Ramos & Edano. In forests at medium altitudes. 
Endemic. 
PIPER PERPUNCTATUM C. DC. in Philip. Journ. Sci. 11 (1916) Bot. 219. 
Palawan, Merrill 7246. In forests at low altitudes. Closely allied to 
Piper caninum Blume. Endemic. 
PIPER PILISPICUM C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 452. 
Luzon (Ilocos Norte, Benguet), B. S. 5720 Ramos, F.. B. 12484 Merritt 
& Darling. Endemic. 
PIPER PODANDRUM C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 436, 11 
(1916) Bot. 217. 
Luzon (Zambales), Catanduanes, B. S. 5053, 30495 Ramos, F. B. 8141 
Curran & Merritt. In forests. Endemic. 
