IOWA ACADEMY OF SCIENCES. 239 



432. A. verticiUdta L. Open woods and prairies; fre- 



quent. 

 ACERATES Ell. 



433. .1. laniKihiosa (Nutt.) Decaisne. Frequent on high 



prairies. 



convolvulace^. 

 Convolvulus L. 



434. C. sepiiim L. {('(di/stcyia si'jiium II. Br.) Wild 



Morning-! Jlory. Woods and prairies; very com- 

 mon and troublesome in cultivated fields. 



CUSCUTACE.^. 



CuscuTA L. Dodder. 



435. C. arrensis Beyr. Parasitic on Artemisia on a dry 



knoll east of Armstrong. 



436. C. j)o/t/(/ofioruni Engelm. (C chloroaiypa Engelm.) 



Iowa Lake; common on various tall herbs. 



437. C. cepha/ant/ii Engelm. [C. fenuiffura Engelm.) 



South of Iowa Lake; the last three species de- 

 termined by Prof. B. Shimek. 



438. C. jyaradoxa Raf. {C. glomerafa Choisy.) Our 



commonest species, looking like rope wound 

 round tall herbs. 



POLEMONIACE.^. 



Phlox L. Phlox; Wild Sweet William. 



439. F. yilosa L. Very common; woods and prairies. 



The flowers occasionally pure white, 



440. P. divaricata L. Very common in woods. 



hydrophyllace^. 

 Hydrophyllum L. 

 44L H. virgiuicum L. Water-leaf. Common in low 

 woods. 

 Macrocalyx Trew. 

 442. M. nydelea (L) Kuntze. [EUisia nydelea L.) 

 Common in low woods. 



