88 FLORA OF WASHINGTON AND VICINITY. 



t Aster corymbosus, Ait. 



Middle of August to last of September. 



Aster macrophyllus, L. 



The form found here differs from the northern form in the size of the leaf and of the 

 heads and in the number of flowers in the heads, and seems to be intermediate be- 

 tween that and A. coryniiosus. The large radical leaves, 12<^™ to 14<=™ wide, spring 

 up in thick patches in May. Last of July or first of August. 



Aster concolor, L. 



September. 



t Aster patens, Ait. Spreading Aster. 

 September. 



Aster laevis, L. 



Some remarkable forms of this species occur. It has only been found in Woodley 

 Park. September. 



Aster laevis, L., var. cyaneus. Gray. 



September. 



t Aster undulatus, L. 



September. 



Aster cordifolius, L. 



Late in September and until after frost. 



t Aster ericoides, L. 



September or October. A remarkable diminutive form, with linear appressed 

 leaves thickly covering the simple stems, 12<=™ to 15<='" high, was found October 5, 

 1879, on rocks below Great Falls. 



Aster dumosus, L. 



Not common. September. 



Aster Tradescanti, L. 



Sei)tenibcr, October. 



t Aster miser, L. 



Late in September or in October ; varying immensely. 



Aster simplex, Willd. 



September or October. 

 Aster tenuifolius, L. 



Narrow-leaved forms of the preceding agree well with authentic specimens of 

 A. tenu'ifoUus, though they can scarcely be distinct. September, October. 



Aster carneus, Nees. 



Caiiicron Eun; Potomac above Rosslyn ; rare. October. 



Aster aestivus, Ait. 



Holmead Swamp ; Terra Cotta Swamp. September. 



t Aster puniceus, L. 



Sept(!inbor, October. 

 Aster puniceus, L., var. vimineus. Gray. 



Piney Branch. September, October. 



