XIV, 3 Beccari: The Palms of the Philippine Islands 335 
ARENGA Labillardiere 
Conspectus of the species. 
at. Leaflets elongate, narrow, having smooth or remotely and minutely 
toothed margins, the secondary nerves parallel, all starting from the 
base. 
6’. Large, with solitary stems. Fruit more or less turbinate, 3 cm or 
more in dinmeter. Male flowers with very numerous stamens; 
anthers ari^ate 1. A. saccharifera. 
b'. Relatively small and caespitose. Male flowers with 20 to 30 stamens; 
anthers blunt or slightly apiculate. Fruit spherical, 15 to 18 mm in 
diameter 2. A. mindorensis. 
a’. Leaflets elongate, yet broad, margins very irregularly undulate or else 
very boldly toothed, or lobed; secondary nerves divergent from the 
rachis at different levels. 
Caespitose; stem attaining 2 to 3 m in height and 15 cm in diameter. 
Male flowers with a rounded top. Stamens about 150. Fruit longer 
than broad, rounded at both ends 3. A. tremula. 
6’. Stem short and thick, about 30 cm in diameter. Male flowers 
apiculate. Stamens about 100. Fruit spherical 4. A. Ambong. 
1. ARENGA SACCHARIFERA Labill. in Mem. Inst. Fr. 4 (1801) 209; 
Griff. Palms Brit. Ind. (1845) 164, t. 135 A; Becc. in Perkins Fragm. 
FI. Philip. (1904) 48, Philip. Journ. Sci. 6 (1911) Bot. 229. 
Saguerus saccharifer Wurmb in Verh. Bat. Genootsch. 1 (1779) 350; 
Blume Rumphia 2 (1836) 128, t. 123-J,. 
Luzon, Tayabas Province, Lucban, Elmer 76JtU; Guinayangan, Merrill 
2043 . POLILLO, Bur. Sci. 90Jfl Robinson, Bur. Sci. 10^68 McGregor. 
Biliran, Bur. Sci. 189^1 McGregor. 
2. ARENGA MINDORENSIS Becc. in Perkins Fragm. FI. Philip. (1904) 
48, Webbia 1 (1905) 49. 
Mindoro, Calapan, Merrill 1790 (type). For. Bur. 8768 Merritt, locally 
known as dumayaca. Luzon, Tayabas Province, Atimonan, For. Bur. 10203 
Curran; Mauban, Bur. Sci. 19^68 Ramos, with the female flowers well 
developed, the staminate ones not yet open: Bataan Province, For. Bur. 
5469 Curran: Laguna Province, Calauan, Bur. Sci. 12395 McGregor. 
Mindanao, Davao District, Mount Apo, Elmer 11192, a more robust plant 
than the Mindoro and Luzon form but otherwise presenting no peculiar 
characters. 
3. ARENGA TREMULA Becc. in Philip. Journ. Sci. 4 (1909) Bot. 612. 
Caryota tremula Blanco FI. Filip. (1837) 744; Kunth Enum. PI. 3 
(1841) 549. 
Didymosjiemna tremulum Wendl. et Dr. in Kerch. Les Palms (1878) 
243. 
Luzon, Tayabas Province, For. Bur. 10213, 10280 Curran, very common. 
Bur. Sci. 1737 McGregor. Palawan, Victoria Peak, Bur. Sci. 735 Fox- 
worthy; near Irauan (altitude, 200 meters) For. Bur. 3542 Curran, Brooke’s 
Point, Elmer 12596. Balabac, Merrill 5372. 
4. ARENGA AMBONG Becc. in Philip. Journ. Sci. 2 (1907) Bot. 229. 
Wallichia oblongifolia (non Griff.) Becc. in Webbia 1 (1905) 328. 
