26 PHILIPPINE AGRICULTURAL REVIEW. 



This form seems to be fairly well distributed and material 

 has been propagated at Lamao from such distinct points as 

 Mindoro, Palawan and Benguet. Unquestionably a lime, it is 

 quite distinct from the ordinary lime in habit, and in the aro- 

 matic tender foliage and purplish-petaled flowers on the outside, 

 which are larger than those in the lime, the number of stamens 

 also exceeding those of the lime. 



B. A. No. 741 (Palawan), 1749 (Mindoro), 2182 (Benguet). 



Citrus excelsa. UMON REAL. 



A thorny, tall shrub of vigorous growth, straggly habit and inter- 

 locking branches, with stout, long, sharp thorns; young growth purplish; 

 leaves 9.5 to 16 centimeters long, 4.5 to 7 centimeters wide, elliptical 

 oblong to ovate oblong, crenate to serrate, thick and leathery; base 

 rounded; apex retuse; petiole 19 to 37 millimeters long, quite broadly 

 winged, in large leaves the wings frequently exceding 2 centimeters in 

 width; flowers 3 to 7, in axillary, rather loose cymes, 36 millimeters 

 in diameter; calyx medium large, cupulate; petals showing trace of purple 

 on the outside; stamens 34 to 35, unequal; filaments occasionally free, 

 usually united into groups of 2 to 6; ovary roundish, 10 to 14 loculed, 

 4.5 millimeters across; style distinct, 5 millimeters long; stigma large; 

 fruit 5 to 7.3 centimeters long, 5.5 to 7.5 centimeters in equatorial diameter, 

 weight 115 to 225 grams; form subglobose; base rounded; apex flattened; 

 surface smooth, greenish to clear lemon yellow; skin thin; pulp greenish 

 to grayish, in good varieties very juicy, mildy acid, and of excellent 

 flavor; juice cells long, slender and pointed. 



Plant material of the limon real has been collected in Tarlac, 

 Bontoc, and Bohol, and the fruit is at rare intervals offered 

 for sale in small quantities in Manila. 



The name of the plant, "Royal lemon," indicates the esteem 

 in which the fruit is held by the people, and while it is unfor- 

 tunately true that most fruits tested have been too dry to be 

 of any value, yet in the best types the fruits in quality and 

 aroma surpass all lemons and limes that the writer has had 

 the opportunity to sample. With its robust, thorny growth, 

 large leaves and broad-winged petioles and considering its affinity 

 to the lime and lemon together with the roundish oblate fruit 

 with 34 to 35 stamens as against the 20 to 26 in those species 

 and with its 10 to 14 locules, this plant is apparently as distinct 

 from the lemon and lime as these species are from each other. 



B. A. No. 1727 (Bontoc?). 



Citrus excelsa var. davaoensis. 



A thorny, arborescent shrub of straggly habit, with interlocking, droop- 

 ing branches, and of vigorous growth; young growth green with tinge 

 of purple; leaves 8.5 to 13.5 centimeters long, 3.8 to 5 centimeters wide, 

 ovate to oblong ovate, crenulate to serrulate; base rounded; apex some- 



