MONOECIA TRIANDRIA. 



589 



perioribus ovalibus, ar- I per oval, acutely ser 

 gute serratisj floribus j rate; flowers hexan 

 6-andris. 



drous. 



Mich. 2. p. 191. Sp. pi. 4. p. 408. Prush, 1 . p. 274. Nntt. 2. p. 211. 

 Potamogeton Verticillatum, Walt. p. 90. 



Stem 1 — 2 feet high, terete, glabrous, floating, radicant, occasionally 

 branching. Lower submersed leaves numerous, verticillate, setaceous, ra- 

 ther more than an inch long, pinnate with the segments also setaceous^ the 

 upper leaves lanceolate, sessile, acutely serrate, somewhat irregularly verti- 

 cillate. Floivers in irregular whorls sitting in the axils of the lanceolate 

 leaves, the upper sterile. Calyx and Corolla small, somewhat persistent. 

 Stamens rather longer than the corolla. Germ 4. Capsnhs united, rib- 

 bed, as in the preceding, along the back. 



Grows in pine barren ponds. 



Flowers May — July. 



SAGITTARIA. Gen. Pl. 1441. 



3Iasculi, Calyx 5- 

 phyllus. Corolla 3- 

 petala. Filamenta plu- 



rima. 



Foeminei* Calyx 3- 

 phyllus. Corolla 3- 

 I)etala. Germina plu- 

 ri m a. Sem ina m u 1 1 a, 



nuda. 



C 





Sterile florets, 

 lyx 3-leaved. Corolla 

 3-petalled. Filaments 

 numerous. 



Fertile florets. Ca- 

 lyx 3-leaved. Corolla 

 3-petalled. Germs nu- 

 merous. Seed many, 

 naked. 



1. Sagittifolia, var, Latifolia. 



S. foliis ovatis, sub I Leaves ovate, gene 

 acutis, sagittatis, lobis rally acute, sagiUate 



ovatis, acuminatis, rec- 

 tis; scapo simplici. flo- 





^ 



ribus 



teis ovatis, acutis. 



monoicis; 



brae 



lobes ovate, acuminate 

 straight; scape simple; 



flowers 



bracteas ovate, acute. 



monoecious; 



Mich. 2. p. 189. Walt. p. 283. Nutt. t. p. 213 

 S- Latifolia, Sp. pi. 4. p. 409- Pursh, 2. p. 396- 



