GENUS 31. THISTLE FAMILY. 409 
Stems erect, delicate, closely tufted, 1°-2° high, 
glabrous, reddish brown, terete. Leaves all petioled, 
glabrate, very thin, but firm and crisp, the lower and 
basal ones oval, rounded, or with a small deep and 
rounded sinus at the base, bluntly acute or short- 
acuminate at the apex, crenate-serrate, the upper 
ones sometimes ovate-lanceolate, the uppermost short- 
elliptic; petioles slender, the uppermost sometimes 
winged; inflorescence 5’ broad, or less, usually of 
about 5 convex glomerules, each often of 10-15 short- 
peduncled heads, its branches spreading, 3’ long, or 
less; rays chiefly 6, white; disk at first golden yellow, 
finally deep purplish crimson; florets broadly bell- 
shaped; outer bracts obtuse, ciliate, pale, with a green 
tip; achenes glabrous. 
On shaded rocks, near Yonkers, N. Y. Peculiar in its 
dense glomerules subtended by large short-elliptic leaves, 
but probably a race of A. divaricatus L. September. 
Zt 
2. Aster tenebrosus Burgess. Long-leaved 
Wood Aster. Fig. 4283. 
Stems solitary or scattered, glabrate, striate, 
about 3° high. Leaves very thin and smooth, 
slender-petioled, broadly oblong, coarsely toothed 
with remote acuminate teeth, abruptly long- 
acuminate at the apex, the basal sinus broad, 
rounded, shallow, except in the lowest ones; 
leaves of the inflorescence lanceolate, subentire, 
sessile, sometimes 4’ long ; inflorescence broadly 
corymbose, heads about 4” high, often 12’ broad; 
rays usually 9-12; disk pale yellow, becoming 
purplish brown, the florets funnelform with a 
long slender tube; outer bracts chiefly elongated- 
triangular, acute, green, the others linear, obtus- 
ish, the green tip lance-linear; achenes generally 
glabrous. 
In moist dark woodlands, New York to Virginia. 
Peculiar in its large dark leaves with coarser teeth 
than in the next species. Aug.—Sept. 
3. Aster divaricatus L. White Wood 
Aster. Fig. 4284. 
Aster divaricatus L. Sp. Pl. 873. 1753. 
Aster corymbosus Ait. Hort. Kew. 3: 207. 1780. 
Stems tufted, assurgent, flexuous, brittle, 
terete, 14°-23° high, glabrate at maturity. 
Leaves thin, smoothish, slender-petioled, ovate- 
lanceolate, dentate with sharp teeth, or the 
small basal ones coarsely serrate, acute to 
acuminate, the basal sinus broad or narrow; 
leaves of the inflorescence small, ovate and 
acute to orbicular; corymb broad, flattish, re- 
peatedly forked, the slender branches long, 
divergent; heads 9-12” broad; rays chiefly 
6-9, linear, white; disk turning brown; bracts 
of the involucre broad, ciliate, the rounded form 
tip with an inconspicuous green spot. / | i, 
In open woodlands and thickets, in rather dry 
soil, Quebec to Manitoba, Georgia and Tennessee. 
Here regarded as consisting of many slightly dif- 
fering races, a number of which have been con- 
sidered species and varieties. Sept.—Oct. 
Aster viridis Nees, remarkable for its coarse rough basal leaves, and large oval rhomboid rameal 
ones, occasionally from New York and Pennsylvania to Virginia, may prove to be a hybrid between 
the preceding and A. macrophyllus L. 
Gj" 
