3IO NEW YORK STATE MUSEUM 



Moist woods and thickets, Labrador to Ontario and western New 

 York, south to the mountains of Georgia and Tennessee. Flowering from 

 July to October. 



Upland White Aster 



Aster ptarmicoides (Nees) Torrey & Gray 

 ( Unamia alba (Nuttall) Rydberg) 



Plate 2.|6a 



Stems slender, stiff, usually rough above, frequently several from a 

 single perennial root, corymbosely branched toward the summit, i to 2 

 feet high. Leaves linear-lanceolate, one to three-nerved, entire or with a 

 few distant teeth on the margins, firm, shiny, rough or ciliate on the margins, 

 sessile or very short petioled, the lower and basal ones 3 to 6 inches long, 

 the upper leaves smaller and those of the branches very much reduced in 

 size. Heads of flowers two-thirds to I inch broad. Bracts of the nearly 

 hemispheric involucres linear-oblong, smooth, green, overlapping in about 

 four series. Ray flowers ten to twenty in each head, white, one-fourth 

 to one-third of an inch long; pappus white. 



In dry or rocky soil, Massachusetts to Vermont and Saskatchewan, 

 south to Pennsylvania, Illinois and Colorado. Flowering from July to 

 September. 



Tall Flat-top White Aster 



Doellingeria umbellata (Miller) Nees von Esenbeck 



Plate 248 



Stems rigid, erect, smooth or somewhat pubescent above, striate, 

 corymbosely branched at the top, i to 8 feet high from a perennial root. 

 Leaves lanceolate to oblong-lanceolate, ascending, smooth above, usually 

 slightly pubescent beneath, long pointed at the apex, narrowed into short 

 petioles or the upper leaves sessile, hispid-margined, 5 to 6 inches long 

 and one-half to I inch wide, the lower leaves reduced in size; basal leaves 

 none. Heads of flowers numerous, one-half to three-fourths of an inch 

 broad in large terminal compound corymbs. Involucres broadly bell- 

 shaped or hemispheric, about one-sixth of an inch high, their bracts lanceo- 



