RUTACEAE 271 



Occasionally cultivated, fl. most of the year; rather widely distributed 

 in the Philippires. Endemic. 



♦2. C. LlMALunan (C. ocida 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 cm 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. 16 cm or more in diameter, the rind 

 very thick, the pulp pale-yellow to pink or red, sweet or acid, the vescicles 

 large, distinct. (Fl. Filip. pi. SOi.) 



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, 8-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 

 mytholo^.) 



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. (Fl. Filip. pi. IH, A. 



deeandra.) 



Occasional in Manila, fl. Mar.-Apr.; widely distributed in Luzon. En- 

 demic. 



In addition to the species considered above, the European rue {Buta 

 graveolens L.), locally known under its Spanish name, ruda, is occasi«mally 

 cultivated for medicinal purposes. It is an undershrub less than 1 m high. 



