CITRUS FRUITS IN THE PHILIPPINES. 21 



containing a minute, greenish nucleus; seeds many, flat, pointed, more or 

 less reticulate. 



The biasong has been collected in Cebu, Bohol, Dumaguete, 

 Negros, and in the Zamboanga and Misamis Provinces in Min- 

 danao, in all of which it is sparingly cultivated. The flowers 

 were described from material collected in Bohol in May. Ripe 

 fruit has been obtained in May, June, August, November, and 

 February, indicating that the species is more or less everbearing. 

 The fruit is used by the native inhabitants as a hair wash, is not 

 eaten, and is of no economic importance. 



Particularly noticeable in the biasong are the small flowers, 

 with less stamens than any other species, and the oblong-obovate, 

 few-loculed fruits. 



The "balincolong," by the Filipinos regarded as quite a dif- 

 ferent fruit, found in Bohol and in Misamis, Mindanao, is a more 

 robust tree attaining a height of 12 meters, and has longer wings 

 and thicker leaves, with smoother fruits which sometimes are 

 almost round, but these differences scarcely justify this form to 

 rank as a subspecies even. Beginning in May, the balincolong 

 (1982) has bloomed continuously at Lamao until date of writing 

 (Dec. 18). 



Biasong, B. A. No. 2502, 4829 (Bohol), Balincolong, No. 4834 

 (Bohol), 1981, 1982 (Misamis, Mindanao). 



Citrus micrantha var. microcarpa. SAMUYAO. 

 ..Y. : (PI. VII6.) 



A shrubby tree, 4.5 meters tall, with slender branches and small, weak 

 spines; leaves 55 to 80 millimeters long, 20 to 25 millimeters broad, ovate 

 to ovate-oblong or elliptical, crenulate, thin, of distinct fragrance, base 

 rounded to broadly acute; apex obtuse, sometimes notched, petioles 20 to 

 30 millimeters long, broadly winged, about 14 millimeters wide, wing area 

 somewhat less than one-half of the leaf blade; flowers in compact axillary 

 or terminal cymes, 2 to 7, small, 5 to 9 millimeters in diameter, white, 

 with trace of purple on the outside; calyx small, not cupped, petals 3 to 

 5; stamens 15 to 18, free, equal; ovary very small, globose to obovate; 

 locules 7 to 9, style distinct; stigma small, knob like; fruit 15 to 20 milli- 

 meters in diameter, roundish in outline; base sometimes nippled; apex an 

 irregular, wrinkly cavity; surface corrugate, greenish lemon yellow; oil 

 cells usually sunken; skin very thin; pulp fairly juicy, acid, bitter with 

 distinct aroma; juice cells very minute, blunt, containing a small, greenish 

 nucleus; seeds small, flattened, sometimes beaked. 



The samuyao occurs sparingly in cultivat'on in Cebu and 

 Bohol. Flowers were ~ collected in May, partly grown fruits 

 were also obtained, and ripe fruits have been collected in June, 

 and from November to February, showing that the plant is more 



