Oed 29. LYTHRACEJE. 



1. AMMANNIA, Houston. 



1. Ammannia latifolia, Linn. 



Hab. Along the Sacramento River, California; in wet places. — 

 Differs from the ordinary form of the plant in its broader and 

 shorter leaves, which are subcordate, but neither dilated nor auric u- 

 late at the base, and in the shorter but still very distinct style. 



2. L Y T H R U M, Linn. 



1. Lythrum alatum, Pursh. 



Hab. Marshes along the Sacramento River, California. — We find 

 the length of the pedicles, as well as that of the accessory teeth of the 

 calyx, to be variable in this species. Our specimens show a transition 

 from L. alatum to L. Californicum, Torr. & Gray; the L. lineare of 

 Hooker and Arnott, not of Linn. 



