236 IOWA ACADEMY OF SCIENCES. 



APIACE.l-:. 



Heracleum L. 

 39(). //. lanatKui Michx. Cow Parsnip. Infrequent in 

 woods. 



Pastinaca L. Parsnip. 



397. P. sdtiva L. Escaped from gardens; a native of 



Europe. 



Thaspium Nutt. 



398. 1\ trifoliatnm aureum (Nutt.) Britton. (7\ 



mireHrn^uti.) Meadow Parsnip. Woods west 

 of Esthervilie. 



Eryngium L. 



399. E. aquaticinu L. [E. yucca'/oliiun Michx.) Rattle- 



snake Master. Very common on prairies. 



Sanicula L. 



400. S. canadensis L. Snakeroot. Common in woods. 



PiMPINELLA L. 



401. P. infcf/errima (h.) A. Gray. Woods, Iowa lake, 



infrequent. 



Washingtonia Raf. Sweet-Cicely. 



402. W.dantoni (Michx.) Britton ( Osmorrhiza brevistyl is 



D C.) Frequent in rich w^oods. 

 SiuM L. 



403. S,. cicutcefoHum Gmel. Common in sloughs, and 



margins of ponds. 



ZiziA Koch. 



404. Z. attrea (L.) Koch. {Thaspium aureum var. 



apterum A. Gray.) Meadow-parsnip, Very 

 common on low prairies. 



405. Z. cordata (Walt.) D C. {Thaspium trifoUafum 



var. apferum A. Gray.) Frequent on dry 

 ' prairies. 



Carum L. Caraway. 

 40G. C. carui L. Adventive from Europe. 



