161 
erous collections of it have been made in adjacent states and it is to be 
expected anywhere in Indiana. It is a less conspicuous plant than some 
of the other dodders which may account for the lack of collections. It is 
ordinarily found most predominant on species of Polygonum. 
Specimens examined :—Lake Co., Whiting (Hill in 1891); Vigo Co. (Deam 22,- 
182) ; Franklin Co., Brookville (Deam in 1903) ; Grant Co., Lake Galacia (Deam 1 
269). 
? 
Ws 
Diet 
Fig. 1V.—Cuscuta pentagona. x4. 
6. CuUSCUTA PENTAGONA Engelmann. Field dodder. 
[FreureE IV.] 
C. pentogona Engelman, Amer. Journ. Sei. & Arts, 43 :340. pl. 6 figs, 22-24. 1842. 
This species is ordinarily treated in the Manuals under the name of C. 
arvensis Beyr. It is one of the most widespread of our North American 
species doubtless due to the introduction of the seeds with those of clover 
and alfalfa. This species becomes a troublesome weed in some localities 
where it becomes established in clover or alfalfa fields. It is thought by 
some that it is capable of wintering over in the crowns of the host plants 
thus obtaining an early start in the spring. 
Specimens examined :—Gibson Co. (Sechneck in 1906); Lake Co., Clarke (Um- 
bach in 1898) ; Putnam Co., Greencastle (Yunecker in 1919) ; Bartholomew Co., Co- 
lumbus (Deam 12,403); Spencer Co., Lake (Deam 28,370), Enterprise (Deam 28,- 
400); Posey Co., Mt. Vernon (Deam 25,430); Ripley Co., Versailles (Deam 7,101) ; 
Vermilion Co., Hillsdale (Degm 9,871) ; Orange Co., Paoli (Deam 17,384). 
