948 



COMPOSITAE 



Erigeron 



Median and upper leaves entire, rarely with a few teeth, linear or narrow-lanceo- 

 late, margins not conspicuously ciliate; pubescence of the middle part of stem 

 usually appressed, the hairs mostly about 0.5 mm long 6. E. ramosus. 



Median and upper leaves toothed in the middle, ovate-lanceolate to narrow-lanceo- 

 late, the margins conspicuously, coarsely hispid-ciliate; pubescence of the 

 middle part of the stem usually sparse, the hairs usually spreading, mostly 



1-2 mm long, about twice as long as those of the preceding species 



7. E. annuus. 



1. Erigeron canadensis L. (Leptilon canadense (L.) Britt.) Canada 

 Fleabane. Map 2069. This plant bears several other common names, 

 not one of which is applicable to it. It is a frequent to a common weed in 

 cultivated grounds throughout the state. It is also infrequent to frequent 

 in clearings and open woodland. 



Throughout N. A. except in the extreme North; spread also to other 

 countries. 



2. Erigeron pusillus Nutt. Map 2070. My only specimen of this flea- 

 bane was found on a dune of Princeton fine sand along the railroad about 4 

 miles south of Vincennes. It is to be noted that on this same dune I have 

 found Stylosanthes biflora var. hispidissima, Carya Buckleyi var. arkan- 

 sana, and two other hickories that I have not been able to name, which 

 apparently belong to the south or southeast. 



Mass. to Fla., and southw. to S. A., westw. to Ky., Tex., and Calif. 



3. Erigeron divaricatus Michx. (Leptilon divaricatum (Michx.) Raf.) 

 Spreading Fleabane. Map 2071. All of my specimens of this species but 

 two were found in dry soil in pasture fields. It is avoided by grazing ani- 

 mals and for this reason may be detected in a field at a long distance. It 

 prefers a sandy or prairie habitat. In Indiana there are no reports east of 

 the counties shown on the map. My opinion is that this plant has been 

 introduced into northern Indiana within the past 25 years. 



Ohio to Minn., southw. to La. and Tex. 



4. Erigeron pulchellus Michx. Robin's Plantain. Map 2072. The 

 common name is very inappropriate since it is not a plantain. Infrequent 

 to rare in all parts of the state in open places in woodland or in clearings, 



