IOWA ACADEMY OF SCIENCES. 235 



ONAGRACE^. 

 LUDWIGIA L. 



8<S5. L. pohjcnrpa Short caiid Peter. Low ground near 

 Armstrong; rare. 



CHAMiENERiON Adans. 



386. C. angustifoliiun (L.) Scop. {I-J/ii/ohiidu aii(/nsti- 



fol/KiH L. Willow-herb. Very rare; collected 

 but once in low ground one mile northeast of 

 Armstrong. 



Epilobium L. 



387. E. lincaye Muhl. Frequent in low, marshy places. 



388. E. coloratani Muhl. With the preceding, and more 



common. 



Onagra Adans. 

 38^). 0. biennis [h.) Scop. {(Enothera bicniiis h.) Even- 

 ing Primrose. Common on prairies, and as a 

 weed in cultivated fields. 



Meriolix Raf. 



3D0. M.sernilata (Nntt.) Walp. {(Enofhcra serruJata 

 Nutt.) Frequent on dry knolls. 



CiRC.tA L. 



391. r. Ititcfiand h. Frequent in woods. 



HALORAC^IDACE^. 



Myriophyllum L. Water Milfoil. 



392. jf. spicfif/on L Common in lakes and ponds. 



393. .V. hetfropliijIliDn Michx. Ponds and streams; less 



common than the preceding. 



araliace.-e. 

 Aralia L. 



394. A. raceniom L. American Spikenard. Frecjuent in 



low woods. 



395. A. niidicaii/is L. Wild Sarsaparilla. Rare in the 



woods along the west fork of the Des Moines. 



