CVI. ACANTHACEiE. 
566 
[Hygrophila. 
■5 in, wide. Spikes terminal, dense, 1 to 2*5 in. long. Bracts 
•25 to -35 in. long, elliptic. Calyx divided nearly to base, lobes 
linear. Corolla -35 in. long, pubescent, pale blue or white. Stamens 
2. Capsule -25 to -35 in. long, hairy towards the top. Seeds 
20 to 32, orbicular. Hab. Malacca (Griffith). Distrib. India, 
Cambodia. 
(2) H. angustifolia R. Br. Prodr. 479; Clarke, l.c. 644. 
Stems 2 ft. tall, base decumbent. Leaves lanceolate alternate 
both ends, glabrous, 3 in. long, 7 in. wide; petioles -25 in. long. 
Flowers in dense axillary clusters. Bracts -25 in. long, elliptic. 
Calyx -35 to -5 in. long, lobes triangular-linear less than half as 
long as tube, hairy or nearly glabrous. Corolla -5 to 7 in. long, 
pale violet. Stamens 4. Capsule -5 to 7 in. long. Seeds 20 to 
28. Hab. Common in wet spots in open country, Johor, Kota 
Tinggi. Pahang, Pekan. Selangor, Kwala Lumpur (Curtis); 
Batu Caves. Negri Sembilan, Linsum. Tringganu, Bundi (Ros- 
tados) a variety with bracts and calyx very hispid. Kelantan, 
Kamposa. Distrib. South India, Malaya, China. Native name; 
Kerma Batu. 
(3) H. saxatilis Ridl. Trans. Linn. Soc. iii. 333; Clarke, l.c. 
645. 
A dwarf tufted plant 6 to 14 in. tall. Leaves crowded linear, 
base narrowed, sessile, glabrous, 1 to 1-5 in. long, -175 to -2 in. 
wide. Flowers axillary, 1 to 3 together. Calyx-lobes linear with 
white hairs on the edge. Corolla white, blue inside, *35 in. long. 
Capsule -3 in. long. Hab. In cracks in rocks in streams, mountain 
districts. Pahang, Tahan River. Perak, Temengoh. Kelantan, 
Galas River (Ridley); Kwala Aring (Yapp). Distrib. Cambodia, 
Borneo, Ceylon. 
(4) H. meianthos Clarke, l.c. 645. 
Plant robust, ascending, branched, over 1 ft. tall. Leaves 
obovate obtuse, -5 to 1-25 in. long; petioles -5 in. long. Flowers 
rather few in axillary whorls. Calyx -25 in. long, divided into 
triangular lobes about half-way down, covered all over with stiff 
white hairs. Corolla *25 to *35 in. long, white edged violet. Capsule 
•35 in. long, blunt. Hab. Wet grassy marshes, not common. 
Perhaps only a poor variety of H. quadrivalvis. Singapore, 
Botanic Gardens. Malacca (Maingay). 
(5) H. quadrivalvis Nees, Wall. PI. As. Rar. iii. 80; Clarke, 
l.c. 645. 
A robust plant 3 to 4 ft. tall, branched. Leaves oblong-obovate 
narrowed to base, tip round, glabrous except ciliate edge, 1-5 to 
2 in. long, *36 in. wide, occasionally crenulate; petioles -i in. long. 
Flowers in axillary clusters, few. Bracts and calyx glabrous. 
Calyx-lobes very short, -05 in. long, tube -25 in. long. Corolla 
•5 in. long, tube and upper lip white, lower lip lobes violet edged 
white, centre lobe white; in the throat on lower lip, 2 raised 
