mn 



TETHANDRIA TETRAGYNiA. 



2. Heter 



P 



foliis 



perioribus 



Upper leaves opposite, 



oppositis, lanceolatis, pe- j lanceolate, petiolate, 9 

 tiolalis, quinquenervibus: 1 nerved; the lower alter. 

 inferioribus alternis. li- nate. linear, sessile. 



ibus, sessilibus 



) 



E 



r 



Sp. pi. 1. p. 713. Pursh, 1. p. 120. 

 P. hjbridum, Mich. 1. p. 101. 



Root perennial. Stem 1 



5 or 4 feet long, branching, glabwwi 



' ' li 



Qpper leaves acute at each end, very entire, I inch long, 5 

 Flowers in spikes, crowded, opposite the leaves, and axillary. Cw*' 



wide J the lower ones, which are submersed, 1 



la 4 petalled ; petals nearly round, concave, obscurely green, dectdtt' 

 OHS. J'Hlaments shorter than the corolla. Anthers 2 lobed, BMJ7 

 round. Germs 4. Btyles very short. Stigma obtuse, capitate. **■» 

 4, Feniform, nearly round, roughened. 



This plant seems strongly to resemble the P. ietaceum of Pursh. 



Grows in stagnant water. 

 Flowers April. 



S. Pauciflorum. Pui 

 p. foliis linearibus, i 



silibus 



infei 



ternis, superioiibus 



.. , Leaves linear, sessile, 

 al- I the lower alternate, the 



pper verticillate ; spikes 



spicis peduncula- on peduncle 



flowers 



tis, paucifloris 



Pursh, l.p. 121. 



£ 



fev^ 



Mich 



w 



Stem branching, much difiused. 



Leaves linear, 1-2 'nclie*^' 



Spikes on^ 



des nearly an inch long, one from eacli whorl of leaves 



few, 4—10. 



Grows in shallow water. 



J'lowers through the sun 



/ 



^ 



^ 



