THISTLE FAMILY 655 
2. Inflorescence largely Unilateral (secund) 
Lower leaves egg-shaped, upper leaves lance-shaped . . . . . A. Jateriflorus 
All leaves linear. ek: 
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1. Inflorescence not unilateral 
Lower leaves broad, egg-shaped, heart-shaped at base, on slender leaf- 
stalks. None of the leaves clasping the stem 
1. A. divaricatus, L. (Fig. 1, pl. 179.) Wire Woop Aster. (A. 
corymbosus, Ait.) Stem slender, somewhat zig-zag, tufted, round, 1 to 2 
ft. high. Leaves thin, scarcely hairy, the lower egg-shaped to somewhat 
lance-shaped, the base heart-shaped; borders coarsely toothed, teeth sharp; 
leaf-stem slender, not hairy; apex of leaf narrow tapering. Heads of 
flowers in an irregular, broad, flattish, repeatedly forked cluster. Heads 
about an inch broad, including the rays. Bracts of the involucre broad, 
rounded at the tip, regularly overlapping, closely hugging each other, the 
tips scantily herbaceous. Central disk yellow, turning brown. Rays 
white, linear, about 6 to 9 to a head. Found in the open borders of woods 
and thickets, very common. Sept.-Oct. 
The following 4 are among the forms strongly resembling A, divaricatus which Prof. 
Burgess regards as separate species 
2. A. carmesinus, Burgess. Crimson-p1sK Aster. Resembles A. divaricatus, 
but the disk turns purplish crimson, the rays rather shorter, the stem for the head 
shorter and the heads on somewhat short stems, in about 5 rounded groups. Near 
Yonkers, N. Y. 
3. A. tenebrosus, Burgess. Lonc-LEAvED Woop Aster. Similar to No. 1, but 
stems usually not tufted, about 3 ft. high, the upper stem leaves more lance-shaped, 
the disk becoming purplish brown, rays from 9 to 12, narrower than those of No, 1. 
New York and southward. 
4. A. Claytoni, Burgess. (Fig. 4, pl. 180.) Crayton’s Aster. Similar to No. 1, 
Stem red, main cluster of heads on longer stems and the subordinate clusters dis- 
tinct. Rays about 6; disk turning brown. New York and southward. 
A. curvescens, Burgess. Dome-roppep Aster. Stem green; basal leaves 
tufted, heads of flowers in a rather loose somewhat cylindric cluster. Disk becom- 
ing purple-brown. New England, New York and southward. 
6. A. glomeratus, Bernh. (Fig. 4, pl. 179.) Brernuarpti’s ASTER. 
The cluster of heads rounded, the whole plant hairy, the bracts of the 
involucre green. Otherwise similar to No. 1. In ravines, thickets or 
swamps, New York and Penna. 
7. A. Schreberi, Nees. Scureser’s Aster. Stem stouter than No. 
1; 2 to 3 ft. high. Lower leaves many, broad heart-shaped at base, taper- 
ing at apex, rough above with stiff hairs; leaf-stalks conspicuously hairy 
with soft hairs when young. Upper leaves lance-shaped. Heads in broad 
flat clusters. Bracts obtuse, greenish. Rays about 10. New York and 
westward. 
8. A. macrophyllus, L. (Fig. 5, pl. 179.) Larcr-LEAVED ASTER. 
Plant rough with long root-stocks and stout, rigid, reddish stems, which 
are angular, 2 to 3 ft. high. Lower leaves numerous, rather thick, closely 
and sharply toothed, on long and slender leaf-stalks; blade 4 to 10 in. 
loig, more than 3 as wide, heart-shaped at base, abruptly pointed at apex; 
the upper leaves oblong on short margined leaf-stalks, the uppermost with- 
out leaf-stalks. Heads in large diffuse rigid flattened clusters. Rays white 
