224 
IOWA ACADEMY OF SCIENCES. 
Onagra. 
^ 445. 0. biennis (L.) Scop. {Oenothera biennis L.) 
Meadows and waste ground; abundant. 
(Enothera. 
446. Oe. laciniata ]1\\\ . {Oe. sinuata L-) Dry, sandy 
ground. Two specimens obtained from differ- 
ent localities. 
Meriolix. 
447. M, serridata {^ntt.) Walp. {Oe. sernilata Nutt.) 
Dry prairies; abundant. 
Gaura. 
448. G. coccinea Pursh. Dry, open ground; scarce. 
CiRCiEA. 
449. C. liitelana L. Common in cool, damp woods. 
HALORAGIDACE^ 
Myriophyllum. 
450. M. verticillatiini L. Ponds; infrequent. 
ARALIAEE^. 
Aralia. 
451. A, racemosa L. High banks of streams; frequent 
452. A. niidicaidis L. Pich woods; common. 
Panax. 
453. P. qninqne folium L. {Aralia quinqiiefolia Decsne 
& Planch.) Rich woods; becoming scarce. 
UMBELLIFER^. 
OXYPOLIS. 
454. 0. rigiclus (L.) Brit. {Tiedemannia rigida Coult. & 
Rose.) Swamps; common. 
Heracleum. 
455. H. lanaium Michx. Damp woods and thickets; 
common. 
Pastinaca. 
456. P. sativa L. Moist, open ground; common. 
