1006 



COMPOSITAE 



Hypochaeris 



50 



Map 2208 



Tragopogon pornfolius L. 



50 



Map 2209 



Tragopogon pratensis L. 



9572. HYPOCHAERIS [Vaill.] L. Cat's-ear 



See excluded species no. 697, p. 1005. 



9579. TRAGOPOGON [Tourn.] L. 



Flowers purple; peduncle thickened at the summit; involucral bracts usually 40-60 mm 

 long, rarely 25-40 mm long, much longer than the rays 1. T. porrifolius. 



Flowers yellow; peduncles usually not conspicuously thickened at the summit; bracts 

 usually 25-35 mm long, as long as or shorter than the rays 2. T. pratensis. 



1. Tragopogon porrifolius L. Vegetable-oyster. Map 2208. This 

 species is infrequent to rare as yet in the state but is becoming well estab- 

 lished in the northeastern part. It is found along roadsides and railroads 

 and in waste places and fallow fields. I found it in a waste place in 

 Bluff ton in 1897, and it still persists and has spread over a much larger 

 area. 



Nat. of Eu. ; Ont. to Minn, and B. C, southw. to Ga. and Calif. 



2. Tragopogon pratensis L. Goatsbeard. Map 2209. Becoming es- 

 tablished in our northern counties along roadsides and railroads and in 

 waste places and fallow fields. 



Nat. of Eu.; N. B. and N. S to Man., southw. to N. J., Ohio, and Colo. 



9592. TARAXACUM [Haller] Ludwig Dandelion 

 [Fernald. Taraxacum in Eastern America. Rhodora 35: 369-386. 1933.] 



Seed greenish buff, the space between the muricate body and the base of the beak 

 about 0.5 mm long; few or none of the outer series of bracts with a callosity on 

 the back near the summit; leaves usually shallowly divided, their basal parts 

 usually not reddish 1. T. palustre var. vulgare. 



Seed reddish, the space between the muricate body and the base of the beak about 

 1 mm long; all or nearly all of the outer series of bracts with a callosity on the 

 back near the summit; leaves deeply divided usually to the midrib, their basal 

 parts reddish 2. T. laevigatum. 



