IOWA ACADEMY OF SCIENCES. 
235 
ONAGRACEiE. 
Ludwigxa L. 
385. L. polgcarpa Short and Peter. Low ground near 
Armstrong; rare. 
Cham^enerion Adans. 
386. C. august if 'olium (L.) Scop. (. Epilobium angusti- 
folium L. Willow-herb. Very rare; collected 
but once in low ground one mile northeast of 
Armstrong. 
Epilobium L. 
387. E. linear e Muhl. Frequent in low, marshy places. 
388. E. colorgtum Muhl. With the preceding, and more 
common. 
Onagra Adans. 
389. 0. biennis (L ) Scop. ( (Enothera biennis L.) Even- 
ing Primrose. Common on prairies, and as a 
weed in cultivated fields. 
Meriolix Raf. 
390. M. serrulata (Nutt.) Walp. (( Enothera serrulata 
Nutt.) Frequent on dry knolls. 
ClRCiEA L. 
391. C. lutetiana \j. Frequent in woods. 
HALORAGIDACE^E. 
Myriophyllum L. Water Milfoil. 
392. M. spicatum L Common in lakes and ponds. 
393. M. heter ophy Hum Michx. Ponds and streams; less 
common than the preceding. 
ARALIACE^. 
Aralia L. 
394. A. racemosa L. American Spikenard. Frequent in 
low woods. 
395. A. nudicaulis L. Wild Sarsaparilla. Rare in the 
woods along the west fork of the Des Moines. 
