570 MINNESOTA BOTANICAL STUDIES. 



had a series of plants, evidently brought together correctly, 

 the larger forms of which are Aster junceus. Some of the forms 

 approach closely to specimens of Aster salicifolius var. subasper. 

 When more slender and fewer-headed, as in some of these 

 specimens, the plant agrees very well with Pringle's Aster lax- 

 ifolius Nees, var. longifolius Lam., from Vermont. And the 

 smallest specimens of the series under this number could not 

 be distinguished from Pringle's Aster ericoides, var. pringlei 

 Gray, from lake Champlain. (The Synoptical Flora give lake 

 Champlain as the only station known for this var. pringlei. 

 But among the "unknowns" in the National Herbarium I found 

 a plant collected in 1868 by Dr. Vasey, in Colorado, which 

 agrees in every respect with this Aster ericoides. var. pringlei: 

 except that the heads are less developed.) Again, some of the 

 plants under No. 761, Aster salicifolius Ait., approach Aster 

 junceus Ait. No. 665, of which unfortunately only two plants 

 were found, has the large heads and the mode of branching of 

 A. novi-belgii L., but has the lower stem and leaves of Aster 

 junceus Ait., where it was finally allowed to rest. Under Aster 

 puniceus, No. 894 is considered the typical form. It is much 

 less common in southern Minnesota than the form No. 986, 

 which is bushier, with leaves denser and broader, and agrees 

 well with Pringle's Vermont plant. No. 928, referred above to 

 the western Aster modestus, is possibly a hybrid between Aster 

 puniceus and novae- angliae. Aster macrophyllus L. occurs in two 

 forms. No. 804 is the larger, less canescent, with larger, thin- 

 ner leaves. No. 927, being shorter, stouter, more canescent, 

 with thicker leaves, approaches the western Aster radulinus r 

 from which, however, it differs in its more scarious involucral 

 bracts, and its quite glabrous longer akenes. 



An unqualified specific reference of some of these Asters is 

 not possible. 



Erigeron animus (L.) Pers. Syn. 2:431. 1807. 

 Copses. Cannon Falls. June. No. 329. 



Erigeron canadensis L. Sp. PI. 863. 1753. 

 Below Grand Rapids. August. No. 742. 



Erigeron philadelphicus L. Sp. PI. 863. 1753. 



Meadows. Thompson; lake Itasca. May, July. Nos. 121 r 

 1129. 



Erigeron ramosus (Walt. ) B S. P. Prel. Cat. N. Y. 27. 1888. 

 Sandy soil. Minneapolis. July. No. 612. 



