66 THE MEDIOINAL PLANTS OF THE PHILIPPINES 



ventive dose is 30-40 grams a day. Its curative dose is 100- 

 150 grams a day. To preserve the lime-juice it was bottled 

 witii a layer of oil, which, floating on the surface kept it from 

 contact with the air ; but this process gave it a bad taste as did 

 also the addition of sulphate of calcium, and at present the 

 English add, to each liter of juice, 60 grams of alcohol, which 

 preserves it perfectly. Fonssagrives says that the antiscorbutic 

 action of lemon juice is due rather to the vegetable juice itself 

 than to the citric acid which it contains. 



Botanical Description. — A most familiar tree 11° or 

 more high, trunk with solitary thorns. Leaves ovate, obtuse, - 

 acute-toothed, the petiole bearing serrate wings^- Calyx 4-6- 

 toothed. Corolla, 4 thick petals. Filaments 10-25 on the 

 receptacle, some joined and bearing 2-3 anthers. Fruit thiu- 

 skinned, globular, about 1' in diameter; the rind adheres 

 3losely to the pulp. 



(This fruit closely resembles, if it is not identical with the 

 ime fruit, G. Limetta, or C Ber<jaiiua, Risso, though Gray 

 states that the leaf of the latter has a wingless petiole. — J. B. T.) 



Habitat. — Common to all parts of the islands. 



[Jitrus Bigaradia, Hook. f. (C. vulgarin, Eisso ; C. aumntium, 



Blanco.) 



NoM. VuLG. — Naranjas dd pais, Sp.; Kahcl, Kahil, Tag.; 

 Native Orange, Eng. 



Uses. — The rind of the c(if/cl is the so-called bitter orange 

 )eel, the best of which comes from Cura9ao and Barbadoes. 

 [t is tonic and is used in decoction and in syrup. The infusion 

 )f the le-wes, 5-10 grams to the liter, is useful as a sedative 

 md diaphoretic in hysterical and nervous attacks ; the infusion 

 >f the flowers is similarly used. When distilled the flowers 

 'ield a very sweet essential oil called nero/l, which is used as a 

 lerfume only. 



Botanical Description. — A tree lo-2()° high trunk 



