16 PHILIPPINE AGRICULTURAL REVIEW. 



times almost orbicular, distinct leaves and fruit easily distinguish 

 the talamisan from all other species in the genus. 

 B. A. No. 2529, 4833 (Bohol). 



Citrus niacroph ylla. ALEMOW. 

 (Pis. III6, Vic.) 



A tree attaining a height of 6 meters, of upright growth, and rather 

 long, stout, sharp spines; leaves 14 to 18 centimeters long, 6 to 8 centi- 

 meters wide, elliptical to ovate, crenate to serrate; base rounded; apex 

 acute; petioles 18 to 40 millimeters long, broadly winged, wings frequently 

 exceeding 35 millimeters in width ; flowers 4 to 7, in compact cymes, sessile, 

 18 to 22 millimeters in diameter; calyx cupped; petals 4 to 5, oblong; 

 stamens 26 to 30; filaments nearly always free; ovary small, 13 to 16 

 loculed; style distinct; stigma club shaped, small; fruit 85 to sometimes 

 exceeding 100 millimeters in length, attaining a weight of 500 to 800 

 grams, subglobose to roundish oblong, more or less compressed towards 

 base, which is nippled and with stem inserted in a shallow cavity; apex 

 flattened with a circular depression around the raised stigmatic area; 

 surface greenish lemon yellow, rather rough, with transverse corruga- 

 tions; oil cells small, sunken; skin comparatively thin; pulp grayish, rather 

 dry, sharply acid, lemon flavored; juice cells rather slender, long, and 

 pointed; seed medium large, short and plump, smooth, sometimes beaked. 



The alemow is a very rare fruit occurring in cultivation in 

 Cebu, and considered inedible even by the natives. The descrip- 

 tion of the flowers was made from fresh specimens collected in 

 May. The tree is said to bloom later in the year during the 

 rainy season having then larger flowers. Partly grown fruit 

 was then seen on the tree and since mature fruit has been ex- 

 amined by the writer from December to late in February the 

 alemow is evidently nearly if not quite everbearing. 



The principal distinguishing features in this species are the 

 large, broad leaves, the comparatively short but quite broad- 

 winged petioles, the free rarely united filaments, and the quite 

 large, peculiarly shaped fruit; it is thus apparently one of the 

 links between the two branches of the genus, one of which has 

 the filaments more or less united and the other the filaments 

 free, being in the first group most closely related to the pomelo. 



The alemow was first forwarded to the writer under the name 

 of colo : Bulletin 27, Plate XIV. 



B. A. No. 2510, 2377, 3677, 4820 (Cebu). 



Citrus southwickii. LIMAO. 

 (Pis. Hie, IVc.) 



A thorny tree, with dense head and drooping branches, attaining a height 

 of 6 meters; spines small but sharp, leaves 9.5 to 14 centimeters long, 

 36 to 53 millimeters broad, ovate to roundish ovate, conspicuously crenate, 



