Vol. 2 PIPERACEAE 3 
PIPER ALLENII C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 441. 
Piper longivaginans C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 444, 
11 (1916) Bot. 219 (incl. forma b). 
Luzon (Tayabas, Nueva Ecija, Laguna, Zambales, Rizal, Camarines), 
Mindanao (Surigao), Allen 152, B. S. 6069 Robinson, 28797, 26496, 26497, 
29094 Ramos & Edano. In primary forests at low and medium altitudes. 
Endemic. 
PIPER ANGUSTIPELTATUM Merr. in Philip. Journ. Sci. 17 (1920) 244. 
Luzon (Tayabas, east coast), B. S. 28846 Ramos & Edano. In damp 
forests at low altitudes. Endemic. 
PIPER ARBORESCENS Roxb. Hort. Beng. (1814) 80, Fl. Ind. 1 (1820) 
161, ed. 2, 1 (1832) 159; Merr. Interpret. Herb. Amb. (1917) 180. 
Piper miniatum Blume in Verh. Bat. Genoots. 11 (1826) 166; C. DC. 
Prodr.. 16* (1869) 354, Leafl. Philip. Bot. 3 (1910) 766, Philip. 
Journ. Sci. 5 (1910) Bot. 422 (incl. formae a, b, c), 11 (1916) Bot. 
208; F.-Vill. Novis. App. (1880) 175; Vidal Phan. Cuming. Philip. 
(1885) 138, Rev. Pl. Vasc. Filip. (1886) 219. 
Chavica miniata Mig. Syst. Pip. (1843) 234, Nov. Act. Acad. Nat. 
Cur. 21 (1846) Suppl. 32, ¢. 28, Fl. Ind. Bat. 17 (1858-59) 440. 
Piper glandulosa Opiz in Pres] Rel. Haenk. 1 (1828) 158. 
Northern Luzon to Palawan and Mindanao. Common in forests at low 
and medium altitudes. Malay Peninsula and Archipelago. 
Local names: Lauingan (Buk.) ; mangolas (Sub.) ; manlakbayan (Mbo.) ; 
malabonyok (C. Bis.) ; opoi (Mbo.); parong (S. L. Bis.) ; tugpuan (Buk.). 
Var. HIRTELLUM (Miq.) comb. nov. 
Piper miniatum Blume var. hirtellum C. DC. in Leafl. Philip. Bot. 3 
(1910) 776, Philip. Journ. Sci. 5 (1910) Bot. 422. 
 Chavica miniata Mig. var. hirtella Mig. Fl. Ind. Bat. Suppl. (1860-61) 
473. 
Mindanao (Davao), Elmer 11229. In primary forests, altitude about 
750 m. Sumatra. 
PIPER APOANUM C. DC. in Leafl. Philip. Bot. 3 (1910) 785, Philip. 
Journ. Sci. 5 (1910) Bot. 454. 
Mindanao (Davao, Mt. Apo), Elmer 11174. In thickets, altitude about 
800 m. Closely allied to Piper viminale Opiz. Endemic. 
Local name: Manikatapai (Bag.). 
PIPER ARBORISEDENS C. DC. in Philip. Journ. Sci. 11 (1916) Bot. 223. 
Luzon (Laguna), B. S. 249384 Ramos. In forests at low altitudes. En- 
demic. 
PIPER ATROSPICUM C. DC. in Philip. Journ. Sci. 11 (1916) Bot. 208. 
Luzon (Tayabas), Leyte, B. S. 15359, 28781, 28664 Ramos. In forests 
at low and medium altitudes. Endemic. Very closely allied to Piper 
allentt C. DC. 
PIPER AURILIMBUM C. DC. Leafl. Philip. Bot. 3 (1910) 768, Philip. 
Journ. Sci. 5 (1910) Bot. 425, 11 (1916) Bot. 210. 
Luzon (Cagayan, Kalinga, Ifugao, Benguet), Elmer 8866, B. S. 18980, 
138946 Ramos, 37499, 37566, 37568 Ramos & Edafio, 19821 McGregor, Weber 
1584. In forests at medium altitudes. Endemic. 
