408 CIX. ACANTHACEX. (C. B. Clarke.) [Hygrophila. 
Wall. Cat. 7150. H. obovata, Nees in Wall. Pl. As. Rar. iii. 81, and in DC. Prodr. 
xi. 91 (not of Wight, nor Ruellia obovata, Roxb.) H. undulata, Nees in DC. l. c. 
91, partly (not Ruellia undulata, Vahl).—Prome; Wallich. Mergui ; Grifith.— 
Distrib. Java, Borneo. Lateral nerves of the leaves patent, arcuate, prominent, 
regular. Whorls often dimidiate, but entire often, as in Wallich's type speci- 
men. 
5. H. quadrivalvis, Nees in Wall. Pl. As. Rar. iii. 80, and in DC. 
Prodr. xi. 89; erect, leaves lanceolate or elliptic narrowed at both ends 
glabrate, bracteoles oblong obtuse, calyx in flower divided 4 the way down 
lobes lanceolate minutely strigillose, capsule much exceeding thecalyx. H. 
obovata, Wight Ic. t. 1489; Nees in Pl. Hohenack. n. 292. H. undulata, 
Nees in DC. Prodr. xi. 91, partly. Ruellia quadrivalvis, Wall. Cat. 2374, 
type sheet. R. undulata, Vahl Symb. ii. 82—Rheede Hort. Mal. ii. 
t. 46. 
From BENGAL to CEYLON and MALACCA, common, 
Closely resembling H. salicifolia except in the points stated. Leaves usually 
larger, in Ruellia undulata attaining 4 by 13 in., undulate on margin. Calyx often 
gamosepalous long after flowering. Capsule frequently 2 in., stouter than in H. 
salicifolia.— Ruellia barbata, Vahl Symb. iii. 83, adduced here by Nees, is stated by 
Vahl to have biaristate anthers, and his description does not otherwise fit well. 
6. H. phlomoides, Nees in Wall. Pl. As. Rar. iii. 80, and in DC. 
Prodr. xi. 90; erect, leaves subsessile elliptic or oblong hairy, whorls of 
flowers hirsute often distant, calyx in flower divided half-way down teeth 
linear hispid. Ruellia phlomoides, Wall. Cat. 2376, type sheet. R. hir- 
suta, ARoxb. Fl. Ind. iii. 51. Dipteracanthus ciliatus, Nees in Wall. Cat. 
715. 
P BENGAL, SIKKIM and AssaM, near the base of the hills; CACHAR, CHITTAGONG, 
EGU. : 
Stems 2-3 ft., hirsute upwards. Leaves often 3-6 in., base narrowed, mostly quite 
sessile. Whorls of flowers dense; bracteoles linear-oblong, as long as the calyx-tube. 
Corolla 3 in. Capsule à in., somewhat exceeding the calyx. :oled 
Var. Roxburghii; branched or decumbent, leaves obovate often shortly petiole 
usually small hairy or nearly glabrous, calyx-teeth linear-lanceolate, corolla j in. 
obovata, Griff. Notul. iv. 134. Ruellia obovata, Roxb. Fl. Ind. ii. 51; Wall. Cat. 
2375, type sheet.—Chittagong, Roxburgh; Soonderbunds, J. D. H., &c.; Pegu, 
Beddome ; Mergui, Griffith. 
VAR. repens; procumbent, rooting, leaves 4—14 in. obovate, flowers rather smaller. 
Silhet; H. f. & T., &c. 
. 7. H. incana, Nees in DC. Prodr. xi. 91 (excl. syn. Roxb.); erect, 
innovations closely softly white-hairy, leaves narrowly lanceolate adult 
densely lineolate on both surfaces, calyx in flower divided more than half- 
way down, teeth linear softly white-hairy and hispid. Ruellia incana, 
Heyne in Herb, Rottler. R. mollissima, Klein ms., not of Vahl. 
DECCAN PENINSULA ; Rottler. ; 
Leaves 4 by $ in., very acute at both ends; petiole hardly any. Capsule $ M.» 
shortly exceeding the calyx.— Very distinct by its soft close white hairiness, to whic! 
scattered long white hispid hairs are added. It is altogether remote from Ruellia 
obovata, Roxb. (= H. phlomoides, Nees Var.) of which Roxburgh’s picture is in 
Herb. Kew, 
, gor Peenus 2. Asteracantha. Spinous. Calyx 4-partite. Seeds 
8. H. spinosa, T. Anders. in Thwaites Enum. 225, andin Journ. Lim. 
Soc. vii. 22; stout, erect, hispid, leaves lanceolate, whorls axillary spinose 
