5lO TKAXS. ST. I.OUIS ACAD. SCIENCE. 



Cuscuta Cephalanthi, Engel. Amer. Jour. Sci. xliii. 2, 1842. — C 

 tenuiflora^ Engel. Gray, Man. ist ed. 

 Low ground; frequent. 



Growing on Salix, Vernonia, Solidago, etc. 



Dr. Engelmann first described tliis species under the impression that it grew only 

 on Cephalanthiis. The next year (1. c. xlv. i, 1843) he says, " I did wrong there, 

 fore, to name them from the genera upon which they grew, and I should much pre- 

 fer to see the names C. Cephalanthi changed into C. ienuiflora, C. Coryli into C. 

 incitrva. * * * if they had not yet been published." Nevertheless, in 1S4S, he 

 makes this cliange. 



C. CoBYLi, Engel. Amer. Jour. Sci. xliii. 1842.— C. inflexa, Eugel. 

 Trans. St. L. Acad. Sci. i. 1S59. 

 Dry thickets; infrequent. 

 Usually on Corylus. 



C. Gronovii, Willd. Reliqu. iu Roem. & Sch. Syst. Veg. vi. 1820. 

 Moist places; frequent. 



Growing on Solidago and other tall herbs. 



C. GiiOMERATA, Choisy, Mem. Genev. 1841. 

 Low ground; not uncommon. 



Usually on Solidago. According to Dr. Engelmann (Cusc. p. 510) Rafinesque's 

 earlier name. C. paradoxa, Ann. Nat. 1S20, should be discarded because of the ob- 

 scure description. 



SOLAN^ACE^. 



SOI.ANUM NKJRUBC, L. SpeC. 



Shadv places; common. 

 S. Carolinense, L. Spec. 



Well established in the field west of the greenhouse. 

 Physalis Philadelphica, Lam. Diet. ii. 



Waste ground ; rare. 



One siiecimen collected on tlie streets of Ames. 



P. PUBESCENS, L. Spec. 



Low ground: not uncommon. 

 P. ViRGINIANA, Mill. Diet. 



Sandy ground; frequent. 

 P. UANCEOI.ATA, Michx. Fl. 



Fields and prairies ; frequent. 

 Datura Stramonium, L. Spec. 



Pastures and waste places; infrequent. 

 D. Tatuua, L. Spec. 2d ed. 



Waste ground; not uncommon. 



5 CR OPHULARIA CEjE. 



VERBAScuBt Thapsus, L. Spec. 



Neglected fields ; frequent. 

 V. Blattaria, L. Spec. 



Qiiite abundant in an open place in the woods northeast of Ames, 

 near .Skunk river. 



