HygropMla.\ Acanthace(2. 293 



2-lipped, lobes long, contorted in bud ; stam. 4, didynamous ; 

 capsule linear, not compressed, without a solid base ; seeds 

 numerous (few in H. spinosa) ovoid, covered with elastic 

 hygroscopic hair, retinacula, long, slightly curved, sharp. — 

 Sp. 18; 8 in Fl.B. Ind. 



Sep. 5, more or less connate into a cal. 



Capsule slightly longer than sep. . . I. H. SALICIFOLIA. 



Capsule twice as long as sep. . . . 2, H. quadrivalvis. 



Sep. 4, distinct 3- H. spinosa. 



1. K. salicifolia, Nees in Wall. PL As. Rar. iii. 81 (1832). 



H. quadrivalvis, van, And. in Thw. Enum. 225. C. P. 591, 3109. 

 Fl. B. Ind. iv. 407. Wight, Ic. t. 1490, 



Erect, often much branched from base, stems 1-2 ft, sub- 

 quadrangular, slightly thickened at nodes, with very fine 

 adpressed pubescence ; 1. variable, \-2\ in., nearly sessile, 

 linear or lanceolate-oblong, tapering to both ends, subacute 

 or obtuse, glabrous, entire or faintly crenate-serrate ; fl. sessile 

 in dense opp. axillary clusters forming rather distant whorls, 

 bracts and bractlets lanceolate, acute, bristly on margins ; 

 sep. 5, equal, longer than bractlets, more or less connate, 

 linear, very acute, slightly hairy ; cor. pubescent outside and 

 on lower lip within ; capsule \ in., slightly exceeding sep. ; 

 seeds about 20, globose-ovoid, slightly compressed, retinacula 

 very slightly curved. 



Damp places in the low country to 2000 ft.; common. Fl. Feb., 

 March, pale purple. 

 Also in India. 



2. K. quadrivalvis, Nees in Wall. PL As. Rar. iii. 80 (1832). 

 Ruellia undulata, Vahl, Moon Cat. 46. Thw. Enum. 225. C. P. 2993. 

 Fl. B. Ind. iv. 408. Wight, Ic. t. 1489 {H. obovata). 



Stem i|-3ft., stout, sub-quadrangular, glabrous, lineolate ; 

 1. larger than in H. salicifolia, 2-5 in., more distinctly petio- 

 late ; fl. as in that species, but sep. connate for | of their 

 length ; capsule f in., about twice as long as cal. ; otherwise 

 as in the last. 



Wet places in the moist low country ; rather common. Galle ; 

 Kalutara ; Colombo. Fl. December, January, 

 Also in India and Malay Peninsula. 

 This is scarcely separable as a species from the last. 



3. K. spinosa, And. in Thw. Enum. 225 (i860). Katu-ikiri, S. 

 Mirmulli, T. 



Barleria lotigifolia, L., Moon Cat. 46. Thw. Enum. 225. C. P. 2900. 

 Fl. B. Ind. iv. 408. Wight Ic. t. 449 {Asteracaniha longifolia). 



Perennial (?) with an ascending rhizome, stems numerous. 



