Vol. 2 PIPERACEAE 9 
PIPER FIRMOLIMBUM C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 435. 
Leyte, Mindanao (Lanao), Clemens, Wenzel 1622. In forests, altitude 
about 600 m. Endemic. 
PIPER FRAGILE Benth. in Hook. Lond. Journ. Bot. 2 (18438) 234, var. 
MULTINERVE C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 421, 11 
(1916) Bot. 208. 
Luzon (Tayabas, Camarines), Bucas, Merrill 3366, 5271, B. S. 19426 
Ramos. On rocks near the sea, in thickets, and in forests at low altitudes. 
The species in New Guinea, the variety endemic. 
Local name: Litlit-anito (Tag.). 
PIPER GLABRISPICUM C. DC. in Perk. Frag. Fl. Philip. (1905) 155, 
Philip. Journ. Sci. 5 (1910) Bot. 451. 
Mindanao (Davao), (Warburg 14748). Endemic. Perhaps a form of 
Piper nigrum Linn. 
PIPER HAENKEANUM Opiz in Presl Rel. Haenk. 1 (1828) 159; C. DC. 
Prodr. 167% (1869) 877, Philip. Journ. Sci. 5 (1910) Bot. 462; 
F.-Vill. Novis. App. (1880) 176. 
Piper hirsutissimum Miq. Syst. Pip. (1843) 336. . 
Luzon (Sorsogon), Haenke. An endemic species of doubtful status, 
perhaps the same as P. merrittii C. DC. 
PIPER HALCONENSE C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 422. 
Mindoro (Mt. Haleon), Merrill 5773, F. B. 4393 Merritt, B. S. 40571, 
40607, 40725, 40729 Ramos & Edano. In forests, altitude about 1,500 m. 
Endemic. 
PIPER HALLIERI C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 458. 
Basilan, Hallier. Endemic. Perhaps merely a form of Piper caninum 
Blume. 
PIPER INTERRUPTUM Opiz in Presl Rel. Haenk. 1 (1828) 157; Mig. 
Syst. Pip. (1843) 336; C. DC. Prodr. 16* (1869) 377, Philip. Journ. 
Sci. 5 (1910) Bot. 448 (incl. forma b), 11 (1916) Bot. 222 (incl. 
forma c); F.-Vill. Novis. App. (1880) 176. 
Piper cumingianum Mig. Syst. Pip. (1848) 329, Fl. Ind. Bat. 1? 
(1858-59) 454; C. DC. Prodr. 167 (1869) 366; F.-Vill. Novis. App. 
(1880) 176; Vidal Phan. Cuming. Philip. (1885) 188, Rev. Pl. Vasc. 
Filip. (1886) 219. 
Northern Luzon to Mindanao. In forests, mostly at medium altitudes. 
Endemic. 
Var. HERBACEUM C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 448. 
Luzon (Bataan), Merrill 3182. On exposed ridges, altitude about 
1,150 m. 
Var. MULTIPLINERVE C. DC. in Leafl. Philip. Bot. 3 (1910) 785, Philip. 
Journ. Sci. 5 (1910) Bot. 448. 
Luzon (Benguet, Tayabas, Rizal, Bataan), Hlmer 7691, B. S. 1019 
Ramos, F. B. 15865 Bacani. In forests at medium altitudes. 
