8 ENUMERATION OF PHILIPPINE PLANTS 1923 
PIPER DELICATUM C. DC. in Leafl. Philip. Bot. 3 (1910) 778, Philip. 
Journ. Sci. 5 (1910) Bot. 444, 11 (1916) Bot. 219 (incl. forma b). 
Luzon (Ilocos Norte, Lepanto, Benguet, Bontoc, Ifugao, Camarines), 
Mindanao, Agusan. In forests on the higher mountains. Endemic. 
Local names: Maniniak (Ig.); tamasaon (Mbo.); umum (Ig.). 
Var. GLABRUM C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 444. 
Luzon (Benguet, Lepanto). In the mossy forest on the higher moun- 
tains. 
PIPER DENUDATUM Opiz in Pres] Rel. Haenk. 1 (1828) 158; C. DC. 
Prodr. 161 (1869) 377, Philip. Journ. Sci. 5 (1910) Bot. 444; 
F.-Vill. Novis. App. (1880) 176. 
Rhyncholepis haenkeana Miq. Syst. Pip. (1848) 284, Fl. Ind. Bat. 1’ 
(1858-59) 448. 
Piper albidirameum C. DC. in Perk. Frag. Fl. Philip. (1905) 158, 
Leafl. Philip. Bot. 3 (1910) 771, Philip. Journ. Sci. 5 (1910) Bot. 
428 (inel. formae 6, c,d), 11 (1916) Bot. 213! 
Piper fuscescentirameum C. DC. in Philip. Journ. Sci. 11 (1916) Bot. 
a 
Piper maagnasanum C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 429. 
Piper psilocarpum C. DC. Philip. Journ. Sci. 11 (1916) Bot. 215. 
Piper lividum C. DC. in Perk. Frag. Fl. Philip. (1905) 155, Philip. 
Journ. Sci. 5 (1910) Bot. 462. 
Piper pendulifolium C. DC. in Leafl. Philip. Bot. 3 (1910) 1772, 
Philip. Journ. Sci. 5 (1910) Bot. 429: 
Northern Luzon to Mindanao, in forests at low and medium altitudes. 
Having examined the types or cotypes of all the synonyms above cited, 
I can see no reason for distinguishing more than one species. Endemic. 
Local names: Boyég (Mbo.); gauéd (Ibn.); guti-guti (Neg.); kangal 
(Bag.); lakbaugan (Mbo.); lauingan (Buk.); litlit (Mbo.); makago 
(Mbo.); manikatapai (Bag.); maragum (Neg.); muyo-btiyo (Bik.). 
PIPER DIPTEROCARPINUM C. CD. in Philip. Journ. Sci. 5 (1910) Bot. 
455. 
Mindanao (Zamboanga), F’. B. 9146 Whitford & Hutchinson. In forests 
at low altitudes. Endemic. Probably a form of Piper caninum Blume. 
PIPER ELLIPTICIBACCUM C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 449. 
Luzon (Ilocos Norte, Camarines), Catanduanes, B. S. 6344 Robinson, 
30385, 33180, 33025 Ramos. In forests at low altitudes. Endemic. Very 
close to Piper interruptum Opiz. 
PIPER ELMERI Merr. in Philip. Journ. Sci. 17 (1920) 245. 
Luzon (Laguna, Sorsogon), Samar, B. S. 24256, 23490 Ramos, F. B. 
26751 Mabesa, Elmer 18059. In primary forests at low and medium 
altitudes. Endemic. 
PIPER EUPODUM C. DC. in Philip. Journ. Sci. 11 (1916) Bot. 219. 
Leyte, B. S. 15227 Ramos, Wenzel 1005. In forests, altitude about 500 
m. Endemic. 
PIPER FENIXII C. DC. in Philip. Journ. Sci. 5 (1910) Bot. 425. 
Batan Islands (Batan), B. S. 3652 Fénix. In thickets at low altitudes. 
Endemic. Apparently very close to Piper betle Linn. 
Local name: Sam6oj (Iv.). 
