CITRUS FRUITS IN THE PHILIPPINES. 25 



To C. pseudolimonum may perhaps also be referred a thorny, 

 arborescent shrub, attaining a height of 4.5 meters, found in 

 Siquijor, a little island south of Negros. Material of this was 

 collected in August, 1912, by the writer, at which time the tree 

 bore partly grown, oblong, rough, small fruits. The plants 

 at Lamao have flowered during the last two months but have 

 not set fruit. The principal difference in this variety from 

 the colo-colo and lombog is in the number of stamens, here 36 

 to 41. 



The fruits of C. pseudolimonum have no economic value. 



Colo-colo, B. A. No. 2535, 4825; Lombog, No. 2498, 4827 

 (Bohol), 1953 (Siquijor). 



Citrus limetta Risso. LIME. 



A shrub or tree of straggling habit, with small, stiff interlocking or 

 drooping, thorny branches, the thorns small, sharp, numerous; bark grayish 

 brown; young branchlets light green, becoming darker with age; leaves 

 elliptic-oval, glossy green in color, margin slightly indented; petioles 

 margined; flowers small, produced in axillary clusters of 3 to 10; calyx 

 small, four to five pointed; corolla white on both inner and outer sur- 

 faces; petals 4 to 5, oblong, fleshy; stamens small, 20 to 25, united in a 

 number of groups; ovary about 10 loculed; fruit rounded or oblong, fre- 

 quently mammilate, light yellow; rind thin; pulp greenish, acid; juice 

 sacs small, slender, pointed; seeds small, oval, pointed. Native to India 

 and southeastern Asia. 



The lime, in Luzon known as "dayap," ranks third in im- 

 portance among the citrus fruits cultivated in the Philippines, 

 and now and then excellent fruit is found in the market, showing 

 what could be done in grwing first-class fruit if pains were 

 taken to do a little selection work and plant budded trees. 



Citrus limetta var. aromatica. 



A spiny shrub, with rather slender, willowly, drooping branches, and 

 sharp spines; young growth light green, of pleasant and distinct odor 

 when bruised; leaves 7.5 to 10 centimeters long, 3.5 to 5 centimeters 

 broad, ovate oblong to elliptical, serrate to crenate, dull green above; 

 base rounded to broadly acute; apex frequently notched; petiole 6 to 

 19 millimeters long with a narrow wing margin; flowers solitary or in 

 cymes to 4, terminal or axillary, 28 to 35 millimeters across; calyx rather 

 large, cupped; petals 4 to 5, white with a trace of purple on the outside; 

 stamens unequal, 28 to 32, more or less united; ovary large, oblong, 12 

 to 13 loculed; style not distinct as in C. aurantium but rather similar 

 to that in C. medica, a trifle more slender than the ovary; fruit 5 

 centimeters long, 4 to 4.5 centimeters across, roundish to roundish oblong, 

 lemon yellow, smooth; skin thin; pulp pale green, juicy, sharply acid, 

 sometimes almost bitter; juice cells long, slender and pointed; seeds very 

 numerous, small and plump, polyembryonic. 



