RUTACEAE 271 
Occasionally cultivated, fl. most of the year; rather widely distributed 
in the Philippires. Endemic. 
*2. C. LIMA Lunan (C. acida Roxb.). Dayap (Tag.); Limon (Sp.-Fil.). 
A shrub or small tree 2 to 4 m high, glabrous throughout, the branches 
armed with slender, solitary, axillary, sharp spines 1 cm long or less. 
Leaves oblong-ovate to elliptic-ovate, crenulate, 4 to 6 cm long, acute or 
obtuse; petioles 1 to 1.5 em long, narrowly winged, oblanceolate. Racemes 
short, axillary, few-flowered. Flowers white, fragrant. Calyx about 5 
mm in diameter, the teeth short. Petals 4, oblong, 10 to 12 mm long, 
glandular-punctate. Stamens 10 to 25, free or nearly so. Fruit sub- 
globose, yellow, 3 to 5 cm in diameter, 10-celled or more, the skin thin, 
the pulp sharply acid. 
Cultivated, fl. most of the year; widely distributed in the Philippines, 
and undoubtedly of prehistoric introduction. India and Malaya; cultivated 
in all tropical countries. 
*2. C. DECUMANA Murr. Lucban, Suha (Tag.); Pomelo. 
A tree 5 to 10 m high, the branches with solitary spines, the branchlets 
compressed, pubescent, green. Leaflets ovate-oblong to elliptic, entire or 
nearly so, apex retuse, sparingly pubescent beneath and on the margins, 
8 to 12 cm long; petioles broadly winged, obovate. Racemes axillary, short, 
the flowers crowded, white, very fragrant. Calyx about 1 cm in diameter, 
shallow, broadly 4-toothed. Petals 4, oblong, 2 cm long. Stamens 16 to 24. 
Fruit large, globose or obovoid, up to 15 cm or more in diameter, the rind 
very thick, the pulp pale-yellow to pink or red, sweet or acid, the vescicles 
large, distinct. (FI. Filip. pl. 304.) 
Commonly cultivated, fl. most of the year; throughout the Philippines 
in cultivation, but probably not a native of the Archipelago. A native of 
Malaya or Polynesia, now cultivated in most tropical and subtropical 
countries. 
6. AEGLE Correa 
Trees with alternate, 3-foliolate leaves, spiny. Flowers in short axillary 
racemes or clusters. Calyx small, 4- or 5-toothed. Petals 4 or 5, free, 
spreading, imbricate in bud. Stamens 10 or more, inserted around the 
disk. Ovary ovoid, 8- to 20-celled; ovules numerous, 2-seriate. Fruit 
large, ovoid to oblong, 8- to 15-celled, the cells many-seeded, the rind thick, 
the pulp aromatic. (From Aegle, one of the Hesperides, of Greek 
mythology.) 
Species 3 or 4, tropical Asia and Africa, 1 in the Philippines. 
1. A. glutinosa (Blanco) Merr. Taboc, Tabog (Tag.). 
A tree reaching a height of 10 m, glabrous except the younger branch- 
lets and inflorescence. Trunk usually spiny, small spines usually present 
on the branches. Leaves 3-foliolate, oblong-ovate to elliptic, obtuse or 
retuse, entire or somewhat crenate, the terminal one 6 to 10 cm long, the 
lateral ones smaller. Flowers white, fragrant, about 1.5 cm long. Fruit 
green or yellow, oblong, about 10 cm long, 10-celled, the pericarp rough, the 
seeds numerous, surrounded by a fibrous coating. (FI. Filip. pl. 124, A. 
decandra.) 
Occasional in Manila, fl. Mar—Apr.; widely distributed in Luzon. En- 
demic. 
In addition to the species considered above, the European rue (Ruta 
graveolens L.), locally known under its Spanish name, ruda, is occasionally 
cultivated for medicinal purposes. It is an undershrub less than 1 m high. 
