310 The Philippine Journal of Science i9i9 
Luzon, Camarines Province, Goa, on the lower slopes of Mount Isarog, 
For. Bur. 14268 Aguilar, April, 1909, Bicol mono. 
I have seen one leaf and one fruit only. It seems, however, 
to be a very peculiar and interesting palm, apparently belonging 
to the section Balanocarpus, although its true affinities remain 
somewhat uncertain; neither the entire spadix nor the male 
flowers are known. The fruit somewhat resembles that of 
Areca Catechu and of A. Ipot, but it differs from both by the 
vascular bundles of the integument which form a distinct and 
rather regular network with 1.25 mm wide lozenge-shaped 
loopholes. From A. Catechu the fruit also differs in the numer- 
ous and approximate lamellae of the rumination which con- 
verge toward the center in a straight and descending course. 
7. ARECA CALISO Becc. in Leafl. Philip. Bot. MS. 
Mindanao, Davao District, Mount Apo, Todaya, at about 1,000 meters’ 
elevation, Elmer 11898, September, 1909, locally known as caliso: Agusan 
Subprovince, Mount Urdaneta, along the Dalahcan River, Elmer 13814. 
Biuiran, Biir. Sci. 18875 McGregor. Leyte, Dagami, Bur. Sci. 15388 Ramos, 
August, 1912; in this specimen the fruit is a little larger than in the 
Mindanao plant. 
8. ARECA COSTULATA Becc. sp. nov. 
Mediocris, caudice circiter 5 m longo. Folia inaequaliter pin- 
natisecta, segmentis rigide papyraceis, 2-3-costulatis, falcatis, 
vel in apice duplicato-bifidis, majoribus 60 cm longis, 7 cm latis. 
Spadix patule laxeque ramosus; ramulis floriferis in parte basi- 
lari, flores 2 ad 4 remote alterne ferentibus, superne zigzag- 
sinuosis et floribus masculis geminis alterne onustis. Flores 
masculi majusculi, 6 ad 8 mm longi; calyce campanulato, basi 
plaeno, breviter 3-dentato; staminibus 6; antheris apice pro- 
funde bipartitis; ovarii rudimento inconspicuo papillaeformi. 
Fructus ovoideo-elliptici, 3 cm longi, 13 mm crassi, conspicue 
longitudinaliter pluricostulati ; pericarpio coriaceo, 2 mm spisso, 
fibris rigidis biseriatis percurso. Perianthium fructiferum 
campanulatum, non marcescens. 
Apparently of medium or rather small size. Stem (slender?) 
6 m high. The leaves have very unequal and inequidistant, 
firmly papyraceous leaflets, the latter with very robust main 
nerves (costae) and sharp secondary nerves, which render 
both surfaces distinctly striate; all nerves are sprinkled, espe- 
cially on the lower surface, with very minute glanduliform 
papillae. The lower leaflets in the specimen before me are 
3-costulate, 60 cm long, 7 cm broad, base broad, apex falcate; 
upper leaflets smaller, 2- to 3-costulate, double-toothed at the 
apex, the primary teeth 4 to 6 cm long, the secondary teeth 
