A 
TETRAND. TETRAG. 279. Ruppia. 280. Sagina. 251 
Upper-leaves lance-ovate, tapering both ways, on long 
ftalks, floating, 
j Europe. Hqffm.Ger, 57. i./i-y'S’ 
Floating leaves petioled, elliptic, tapering both ways ; thofe 
under water crowded, feflile, linear. 
Germany. Hojfm. Ger. 59. Willd. 1./. 713. 
^ Thefe 2 laft appear to be mere local varieties. 
Leaves heart-lhaped, clafping the ftem, all of them under 
water. 
Eonds, Eng. Bat. t. 168. F!or. Dan. t, 196. Moris. 5. t. 
Leaves ovate, pointed, oppofite, crowded ; fteni forked : 
fpike 4-flowered. 
Ponds and flow llreams, Eng.Bot. t. 397. 
Leaves ovate-lanceolate, fiat, ending in petioles: fpike clofe, 
many-flowered. 
Ponds and llreams. Eng, Bot.t. 376. Ekr. Dan. 1. 193. 
Leaves lanceolate, alternate, undulate, ferrate. 
Ditches and ftreanis. Curt. Loud, fafe. 5. r. 15* Flor. Dan, t-t^zj. 
Leaves lanceolate, oppofite, fomewhat undulate. 
Europe. Willd.i.p.liS. Leaves not ferrate. 
Leaves linear, obtufe: fliem comprefled. 
Ditches and ftreams. Eng. Bot. t. 418. Flor. Dan. t. 203. 
'^tum Leaves fetaceous, parallel, approximate, 2-rowed, (heatli.* 
ing at the bafe. 
Streams and ponds. Engl, Bot.t. Flor. Dan. t, \ 00. 
Leaves lanceolate, fetaceous, oppofite, pointed. 
, Muddy ditches. Flor. Brit. 198, Willd. i. /. 7 *b» 
Leaves linear-lanceolate, alternate, feflile, broader than the 
ftipule: ftem round, fomewhat forked. 
Ditches and rivulets. Dill. Ray Syn. 149. t. 4. J", 3. 
Leaves linear, oppofite and alternate, narrower than the 
ftipule, fpreading at the bafe .• ftem round ; peduncles 
axillary. 
Stagnant ditches. Eng. Bot, t. 215. Faill. Par. t. 32./! 4 - 
Eryn 
/«fl 
, 279. ruppia. Calyx o : corol o ; feeds 4, pedicelled. 
Ruppia. 
Salt-water ditches. Eng.Bot. t, 136. Light/, r. 8. f. l. 
280. SAGINA, Calyx 4-leaved; ptals a^'- capjule 
4- celled, many-ieeded. Pearl-wort. 
X i a * c eras to- 
