510 TRANS. ST. LOUIS ACAD. SCIENCE. 



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

 tenuiflora^ Engel. (nay, Man. isted. 

 Low ground; frequent. 

 Growing on Salix, Vernonia, Sol id ago, etc. 



Dr. Engelmann first described this specie- under the impression that it grew only 

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

 Tore, 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. tenuiflora, C. Cory li into C. 

 incurva. * * * if they had not yet been published." Nevertheless, in 184S, he 

 makes this change. 



C. Coryli, Engel. Amer. Jour. Sci. xliii. 1842. — C. inflcxa, Engel. 

 Trans. St. L. Acad. Sci. i. 1859. 

 D ry t h i ckets ; i n freq ue n t . 



Usually on Corylus. 



C. Gronovii, Willd. Reliqu. in Roeni. & Sen. Syst. Veg. vi. 1820. 

 Moist places: frequent. 



Growing on Solidago and other tall herbs. 



C. '.lomerata, Choisy, Mem. Genev. 1841 . 

 Low ground; not uncommon. 



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

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

 scure description. 



SOLANACEJE. 



BOLANUM NIGRUM, L. Spec. 

 Shadv places; common. 



S. Carolinense, L. Spec. 



Well established in the field west of the greenhouse. 

 Pbysalis Philadelphica, Lam. Diet. ii. 



Waste ground : rare. 



One specimen collected on the streets of Ames. 



P. purescens, L. Spec. 



Low ground; not uncommon. 

 P. Virgixiana, Mill. Diet. 



Sandy ground; frequent. 

 P. lanceolata, Michx. Fl. 



Fields and prairies: frequent. 

 Datura Stramonium, L. Spec. 



Pastures and waste places; infrequent. 

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



Waste ground; not uncommon. 



S CR OP HULA RIA CE^E. 



Verrascum Tiiapsus, L. Spec. 



Neglected fields ; frequent. 

 V. Blattabia, L. Spec. 



C^iiite abundant in an open place in the woods northeast of Ames, 

 near Skunk river. 



