48 
IOWA ACADEMY OP SCIENCES 
LYTHRACEAE. 
LiYTHRUM. 
562. L. alatum Pursh. Abundant in swampy soil. 
ONAGRACEAE. 
Ludwigia. 
553. L. polycarpa Short & Peter. Scarce in swamps and marshes. 
A very peculiar procumbent form is found here rarely, which 
does not agree with the generic characteristic of “erect’' 
plants, 
Epilobium. 
554. E. lineare Muhl. Plenty in swamps. 
555. E. coloratum Muhl. Plenty in swamps. 
556. E. adenocaulon Haussh. Scarcer, along streams. 
Onagra. 
557. 0. 'biennis (L) Scop. Common in mmadows. 
Meriolix. 
558. M. serrulata (Natt.) Walp. Abundant on prairit hillsides. 
CiRCAEA. 
559. C. Lutetiana L. Abundant in rich woods. 
halora gid aceae. 
Myriophyllum. 
560. lil. spicatum L. Common in swamps. 
561. M. verticiUatum L. Scarce in swmmps. 
ARALIACEAE. 
Arabia. 
562. A. racemosa L. Com.mon in woods. 
563. A. nudicauUs L. Plenty in woods. 
Panax. 
564. P. quinquefolium L. Scarce in rich woods. Formerly common. 
{Aralia quinqnefolia Bee. Ginseng quinquefolium Wood.) 
UMBELLIFERAE. 
Santcula. 
565. S. maryJandica L. Abundant in woods. 
566. S. gregaria Bicknell. Scarce in wmods. 
567. trifoliata Bicknell. Rare in woods. 
568. S. canadensis L. Scarce in woods. 
Eryngium. 
569. E. aquaticum B. Common in moist meadows. (E. yuccae folium 
Michx.) 
Washingtonia (osmorrhiza Raf.) 
570. W. claytoni (Michx.) Britton. Abundant in woods. 
571. W» longistylis (Torr.) Britton. Scarce in woods. 
