Rotala.} LVIII. LYTHRACE® (HIERN). 467 
Thad Guinea. Senegal, fl. September to February, Perrottet ! fl. January, Roger! 
Hem | 
Grows in low inundated places. 
2. R. tenella, Hiern. Stem low, creeping at base and rooting, 
scarcely 3in. long. Leaves sessile, amplexicaul, obscurely veined, ovate- 
oblong, rounded at apex. Flowers minute, subsessile. Calyx cam- 
panulate or hemispherical, with 4 acute deltoid lobes, not accrescent nor 
cornuate. Petals white, scarcely exceeding the calyx, very deciduous. 
Stamens 4, included, inserted above the base of the calyx ; filaments 
concealed in the longitudinal depressions of the ovary. Ovary ovoid, 
4-suleate, 4-celled ; style short. Capsule globose, dehiscing at the 
apex by 4 valves, enclosed in the persistent calyx. Seeds somewhat 
concave on one side, convex on the other.—Ammannia tenella, Guill. et 
Perr. Fl, Seneg. i. 297. Ameletia tenella, Bl. Mus. Bot. ii. 136. 
Upper Guinea. Senegal, Perrottet! fl. Sept. and Oct. 
3. R. verticillaris, Linn.; DC. Prod. iii. 76; Wight. Ic. ii. t. 260. 
Prostrate, rooting and branched at the base, 1-4 in. long. Leaves 
3or4ina whorl, or in var. 8 often opposite, linear or subulate, 1- 
veined, spreading, 1-4 in. long. Bracts subulate. Calyx campanulate, 
small, scarious, with 5 deltoid acute short lobes, not accrescent, without 
fornua. Petals wanting or caducous. Stamens 3-5 (?), arising from 
the base of the calyx-tube and exserted. Ovary 3-celled, or 1-celled by 
abortion of the thin septa; stigma subsessile. Capsule dehiscing by 
3 valves from apex.—Ammannia Rotala, F. Muell. Frag. iii. 108. 
, Scattered over the tropics of the whole world. 
Var. 8. Spruceana. T.eaves usually opposite, occasionally 3 in a whorl, subulate. 
Plant small. Hypobrichia Spruceana, Benth. in Hb. Spruce; cf. 2. pusilla, Tul. in 
Ann. Sc. Nat. sér. 4, vi. 128 (1856). 
pper Guinea. Niger, Burter! 
Lower Guinea. Anyola, Pungo Andongo, 2400-3800 ft. alt., fl. and fr. March. 
(Var. 8.) Dr. Welwitsch! 
4. R. decussata, DC. Prod. iii, 76. Much branched, 1}-9 in. 
ong, usually spreading. Leaves elliptic oblong or linear, varying ac- 
cording to dampness of locality, narrowed or rounded at the hase, 
Sessile or subsessile, blunt, spreading, #,—} in. long. Bracts subulate 
at base of calyx. Flowers sessile, solitary. Calyx searious, with 4 del- 
toid lobes and longer aristate caducous cornua, not accrescent. 
etals 4 or 0. Stamens 4 (?), equalling the calyx. Ovary 3-celled ; 
Style short. Capsule 3-valved, exceeding and tearing the calyx ; placenta 
compressed, 3-winged.—Rotala Roxburghiana, Wight. Ic. t. 260, var. 
Ammannia nana, Roxb. Fl. Ind. i. 427. A. illecebroides, Arn. in Wight. 
Hb. 2317, 4, pentandra, Roxb. FI. Ind. i. 427, var. 
Lower Guinea. Angola, Pungo Andongo, 2400-3800 ft. alt., fl. and fr. March, 
Welwitsch | 
curs also in India and Australia. 
4 5. R, Stagnina, Hiern. Stem simple or subsimple, erect, about 
in, high, rooting at base, quadrangular. Leaves ovate-oblong, blunt 
g » 4 gu oe 5 
