NEUE M, mmm. vss c CERE Cu. e SE 
—D—— Qn 
ASTER TENEBROSUS 207 
ing, more purple-tinged. Its leaves are paler, shorter, less long- 
acuminate. The sinus is broader. The cymules in case of small 
plants are all in one mass, but in most they become separated on 
. pale bare slender upcurved branches. 4. divaricatus occasionally 
has its disks turn olivaceous without preliminary reddening, but 
not with the predominant regularity of A. olivaceus. 
A. olivaceus resembles A. divaricatus cymulosus in having seg- 
regated cymules, but differs in many of the just mentioned 
particulars and in its whole habit, taller, slenderer stem, etc. The 
rays of cymulosus are notably shorter, broader, dense, more apt to 
be tridentate, its disks are reddened, its sinus not so broad and 
shallow, its cymules little involucrate. Both A. divaricatus and 
its variety cyuudosus, when growing with A. olivaceus, are chiefly 
in blossom two weeks later or more. 
A. olivaceus is distinguished from A. tenebrosus by its rougher 
leaves, much narrower inner bracts, fewer and less developed rays, 
paler color, etc. My supposition at first sight that it was an 
immature or a drought-condensed stage of A. tenebrosus was dis- 
proved on watching its development the ensuing eight years. 
Like A. tenebrosus, its leaves are extremely thin; but are not so 
sleek ; they are broad-based and salient-toothed, but not so much 
so, nor so large; the outer bracts paler, the inner ones of different 
shape, and the subsessile heads are much more segregated. 
A. olivaceus is distinguished from A. fragrans, which has very 
thin leaves of somewhat similar shape, by its subsessile heads, 
greenish disks, pale leaves, and very different inflorescence. 
Suspivision B. Bracts acute, very broadly triangular; the 
inner ones oblong-obtusish. Sp. 2 
28. ASTER TENEBROSUS Burgess 
Tall wide-branched dark-green plants of deep shade, with large 
thin sleek leaves, strong teeth, acumination and sinus, loosely 
forked inflorescence with numerous long rays and axiles, and 
acute green bracts. 
Name from its home in the shadowed edges of thick woods; L., = accom- 
panied by t 
G. 37, pon from Dunkirk, N. Y., Au. 29, 96, in hb. Bz.; showing small 
TTE branch, a lower cauline leaf (not ib so large in proportion to the: 
