210 PHILIPPINE RESINS, GUMS, AND OILS 



kabugau (Camarines, Mindoro) ; kamiilau (Iloko) ; kamuntai (Bisaya) ; 

 kamuyau (Ilocos Norte and Sur, Abra) ; kapitan (Iloko) ; kolobot (Taga- 

 log) ; limon-karabdu (Zamboanga) ; makatbd (Zambales) ; peres (Panga- 

 sinan) . 



KABUYAU OIL 



Schimmel * states that the oil of this species has an odor 

 resembling that of bergamot. According to Brooks,t the leaves 

 of the Philippine plant when steam-distilled yield an oil resem- 

 bling in odor the oil distilled from the leaves of the pomelo, 

 Citrus decumana Murr. Although the oil is very fragrant, the 

 y^eld (0.08 per cent) is extremely small. The constants of the 



oil are as follows: Specific gravity, |^ =0.9150; N ^j^- =1.4650; 



on 



A -^ = —10.50'" ; saponification number, 50.2. 



Citrus hystrix is a small tree armed with small spines. The 

 leaves are variable, but average 10 to 12 centimeters in length. 

 The flowers are white and about a centimeter wide. The fruits 

 are about 10 centimeters in diameter. 



This species is common and widely distributed in forests 

 throughout the Philippines, 



CITRUS MICRANTHA var. MICROCARPA Wester. (Fig. 70). Samuyau. 



SAMUYAU OIL 



The rind of this species yields a clear, almost colorless oil 

 which is very fragrant. It should be useful as a perfumery 

 oil. 



The crushed fruits of samuyau are used by women in Cebu 

 for cleansing the hair, or aj*e mixed with Gogo (pounded stems 

 of Entada phaseoloides) which serves as a shampoo. The 

 crushed fruit is also added to coconut oil, to give it fragrance 

 when applied to the hair. 



The oil obtained by steam-distilling the crushed peels had an 

 orange-like odor and the following constants : 



Specific gravity 28.5'= 0.8670 



Refractive index 25°= 1.4718 



(100 mm. tube) 



Optical rotation A ^=-1150 



* Schimmel, Semi-annual report (1901). 



t Brooks, B. T., New Philippine essential oils. Philippine Journal of 

 Science, Section A, Volume 6 (1911), page 349. 



