Megalodonta 



COMPOSITAE 



985 



~~ To 



Map 2157 



Bidens anslosa var mutica (Gray) Gatl 



Map 2158 

 Bidens frondosa L 



~~ 50 



Map 2159 



Bidens vulgata Greene 



Porter County, in a prairie habitat in Vermillion County, and in wet, 

 hard clay soil in fallow fields in other places. 

 Mass. and Va., westw. to 111. and Mo. 



8. Bidens frondosa L. Map 2158. Frequent to common or abundant 

 throughout the state in moist places in stubble and fallow fields, woodland, 

 and ditches and along roadsides. 



Newf. to B. C, southw. to Fla., Tex., and Colo. 



9. Bidens vulgata Greene. Map 2159. Frequent to common in all parts 

 of the state although there are no records from the dune area. It is found 

 usually in a moist habitat in woodland, stubble and fallow fields, and 

 waste places and along roadsides. This species varies greatly in the density 

 and harshness of its pubescence. The var. puberula (Wieg.) Greene has 

 been reported from Indiana but I am now referring these reports to the 

 species. 



Que. to B. C, southw. to N. C, Colo., and Calif. 



10. Bidens polylepis Blake var. retrorsa Sherff. (Sherff. The genus 

 Bidens, p. 220. 1937.) In 1921, I collected this form in Owen County along 

 the roadside about a half mile north of Coal City, and in 1932, I found 

 large colonies of it along the roadside just south of Coal City. It grew in 

 hard, white, clay soil and, no doubt, it has a wider distribution than our 

 collections indicate. 



Ohio and Ind. to Mo. 



9237 A. MEGALODONTA Greene 



1. Megalodonta Beckii (Torr.) Greene. (Bidens Beckii Torr. of Gray, 

 Man., ed. 7.) Water Marigold. Map 2160. Floating in still, shallow water 

 of bayous of lakes and rivers. This species has been reported from Fulton, 

 Kosciusko, Lake, Marshall, Starke, Steuben, and Whitley Counties. Doubt- 

 less it was formerly found throughout the lake area but the settlement 

 of all lake fronts has destroyed it. Another reason why it is not commonly 



