PHILIPPINE CITRUS-FRUITS: THEIR COMMERCIAL POSSI- 
BILITIES AND A CHEMICAL STUDY.OF A FEW OF 
THE MOST IMPORTANT VARIETIES. 
By H. D. Gipps* and F. AGcaorit. 
(From the Laboratory of Organic Chemistry, Bureau of 
Science, Manila, P. I.) 
CONTENTS. 
NARANJITA. CALAMANSI. 
CAJEL. CALAMONDIN. 
DAyYAP (LIME). 
The citrus-fruits of the Philippine Islands, tabulated by Wester 
and Barrett,? are: 
Biasong, Citrus sp. A small, oblong, pyriform, very distinct fruit from 
others of the same genus, found in Cebu. 
Cabuyao, Citrus hystrix DC. This tree is found in most municipalities, 
although usually in few numbers in each municipality; there are several 
varieties. 
Calamondin, Citrus mitis Blanco, is quite generally distributed and the 
fruit may be found in the municipal markets throughout the year. 
Citron, Citrus medica L. Rarely found except in the gardens of hacen- 
deros. 
Colo, Citrus sp. A rather large, pyriform fruit occurring in Cebu. 
Lemon, Citrus limonum Risso. The lemon is grown to less extent even 
than the lime; in fact, it scarcely ever appears in the market; three 
distinct varieties occur. 
Lime, Citrus limetta Risso. The lime occurs in several varieties; the 
best of these is the “limon real,’ a rather large oblately flattened fruit, 
the better seedling trees of which produce a very superior fruit. The 
species is of general distribution throughout the Philippines but is less 
in evidence than the pomelo, mandarin, orange, and calamondin. 
Mandarin, Citrus nobilis *Lour. The most generally cultivated species 
in the genus. It is fairly well disseminated throughout the Islands but 
Batangas is the only province where its cultivation has assumed any 
importance. * * * 
Orange, Citrus aurantium L. Fairly well distributed but of limited 
cultivation; grown principally in Batangas, Cuyo Islands and Panga- 
sinan. 
Pomelo, Citrus decumana Il. Found more evenly distributed in the 
Archipelago than any other species of the genus, it is, however, never 
*Associate professor of chemistry, University of the Philippines. 
? Phil. Agr. Rev. (1912), 5, 365. 
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