358 XXXI. RUTACE.E. [CUrus. 



14. CITRUS, Linn. 



Spiny trees or shrubs. Leaves alternate, unifoliate, coriaceous ; 

 petiole often winged. Flowers axillary, fascicled or in cymes, 

 white or pinkish, fragrant. Calyx cupular 3- to 5-lobed. Petals 

 4 to 8, linear-oblong, imbricate. Stamens 20 to 60 insert round a 

 large cupular disc; filaments connate; anthers oblong. Ovary 

 many-celled; ovules 4 to 8. Berry large, fleshy, many-celled. 

 Seeds with coriaceous or membranous testa. Species about 5, 

 tropical Asia. 



Besides the ones mentioned below we have in cultivation the 

 orange Citrus auraniinm, Linn., the Pumelo C. Decumana, Murr. 



Petioles broad winged . . . . . (i) C. hystrix 



Petioles narrow winged . . . . . . (2) C. medica 



Petioles slender non-winged . . . . • (3) C. malaccensis 



(i) C. hystrix DC. Prod. i. 539; Hook. fil. F.B.I, i. 515. 



Tree resembling a pumelo. Spines slender, sharp. Leaf-petioles 

 obovate, large, top broad refuse, base narrowed, 2 to 2'5 in. long, 

 2 in. across; petioles at base short and thick; leaflets elliptic 

 cuspidate slightly narrowed at base, crenulate, sub-coriaceous to 

 rather thin. Flowers small white. Fruit globose 4 in. through, 

 rind green sometimes tubercled, very thick and pithy, pulp small, 

 pale and acid. Hah. Open country. Pahang (Machado). Malacca, 

 Bukit Kedondong (Derry). Pcrak, Kwala Dipang. 



(2) C. medica Linn. Sp. PL 782; Hook. fil. F.B.I, i. 514. 

 var. acida Hook. fil. I.e. 515. 



The following cultivated plants may be varieties of the lime. 



var. Limau Kasiuri. Small tree 10 to 12 ft. tall, not armed. 

 Leaves elliptic or oblanceolate to nearly obovate, 75 to 175 in. 

 long, '5 to I in. wide; petioles not winged, jointed, '2 to '5 in. 

 long. Flowers "4 in. long, solitary. Petals oblong, linear, axillary. 

 Fruit small globose, i in. through. Use : Vsed in chutnej^s and 

 preserves. 



var. Limau hijau. Leaves oblanceolate narrow at both ends; 

 petioles under i in. long. Fruit small globose, green becoming 

 yellow. The common lime. 



var. Limau nipis. Spiny. Leaves oblong, rounded at both ends, 

 2'5 in. long, i"5 in. wide; petioles very short, 'i in. long. Fruit 

 globose, smooth, rind thin. 



var. Limau Nipis Kapas. Leaves large elliptic as much as 

 4 in. long, 2 in. wide; petioles jointed at top, -25 in. long. Flowers 

 solitary axillar}/ ; pedicels rather long and not broad. 



var. Limau Kadangsa. Tree not spin}^ Leaves lanceolate or 

 oblong, narrow at base, tip blunt rather coriaceous, 2 to 3 in. long, 

 I in. wide; petioles winged, narrow oblanceolate, -5 in. long, '2 in. 

 wide. Flowers small, '25 in. long, several in a cyme. Petals 



