432 : COMPOSITAE. Vor. III. 
70. Aster nemoralis Ait. Bog Aster. 
Fig. 4351. 
Aster nemoralis Ait. Hort. Kew. 3: 198. 1789. 
| Aster nemoralis Blakei Porter, Bull. Torr. Club 21: 
311. 1894. 
Stem puberulent, slender, simple, or corym- 
bosely branched above, 6’-2° high. Leaves ses- 
sile, oblong-lanceolate or linear-oblong, acute at 
each end, pubescent or puberulent on both sides, 
dentate or entire, 1-3’ long, 13’’-10” wide, mar- 
gins often revolute; heads several, or solitary, 
1’-13’ broad, the peduncles slender; involucre 
broadly obconic to hemispheric, its bracts ap- 
pressed, linear-subulate, acute or acuminate, im- 
bricated in about 3 series; rays 15-25, light 
violet-purple to rose-pink; achenes glandular- 
pubescent; pappus white. 
In sandy bogs, New Jersey to northern New 
York, Ontario, Newfoundland and Hudson Bay. 
Races differ in leaf-form and serration. Aug.—Sept. 
{| 
\) 
71, Aster acuminatus Michx. Whorled 
or Mountain Aster. Fig. 4352. 
Aster divaricatus Lam. Encycl. 1: 305. 1783. Not L. 
1753. 
Aster acuminatus Michx. Fl. Bor. Am, 2: 109. 1803. 
Stem pubescent or puberulent, zigzag, corym- 
bosely branched, often leafless below, 1°-3° high. 
Leaves thin, broadly oblong, acuminate at the 
apex, narrowed to a somewhat cuneate sessile 
base, sharply and coarsely dentate, pinnately vein- 
ed, glabrous or pubescent above, pubescent at 
least on the veins beneath, 3’-6’ long, 2’-13’ wide, 
often approximate above, and appearing whorled; 
heads several or numerous, 1-14’ broad; invo- 
lucre nearly hemispheric, its bracts subulate- 
linear, acuminate, the outer much shorter; rays 
12-18, narrow, 6-8” long, white or purplish; 
pappus soft, fine, nearly white; achenes pubescent. 
Moist woods, Labrador to Ontario, western New 
York, and in the mountains to Tennessee and Geor- 
gia. July—Oct. 
72. Aster ptarmicoides (Nees) T.& G. Upland White Aster. Fig. 4353. 
Ae SxS Chrysopsis alba Nutt. Gen.2:152. 1818. Not 
A. albus Willd. 
Doellingeria ptarmicoides Nees, Gen. & Sp. 
Ast, 183. 1832. 
A, ptarmicoides T. & G. Fl. N. A. 2: 160. 
1841. 
uae alba Rydb. Bull. Torr. Club 37: 
146. 1910. 
Stems tufted, slender, rigid, usually 
rough above, corymbosely branched near 
the summit, 1°-2° high. Leaves linear- 
lanceolate, I-3-ribbed, entire, or with a 
few distant teeth, firm, shining, rough- 
margined or ciliate, sometimes scabrous, 
acute, narrowed to a sessile base, or the 
lower petioled, the lowest and basal ones 
3-6’ long, 2’”-4” wide, the upper smaller, 
those of the branches linear-subulate; 
heads 8”-12” broad; involucre nearly 
hemispheric, 2-3” high, its bracts lin- 
ear-oblong, obtuse, or the outer acutish, 
appressed, nearly glabrous, green, im- 
bricated in about 4 series; rays 10-20, 
white, 3-4” long; pappus white; achenes 
glabrous. 
3, In dry or rocky soil, Massachusetts, Ver- 
mont and Ontario to Saskatchewan, Illinois, Missouri and Colorado, July-Sept. 
