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ASTER CASTANEUS 203 
whole suggesting a series of white arch-segments thrown up 
loosely to outline a larger arch. Heads $ in. broad, 5, high. 
Bracts truncate-obtuse, a few of the inner ones much attenuate, 
or of the basal ones acut tish. Green tips spatulate or irregular. 
Involucre narrow, very short, sharp-based 
Rays not large, excessively thin, apt to be 9 on vigorous heads, 
7 in many, and 5 on impoverished heads or on whole plants 
Obvious hair lacking ; under a lens some white ciliation shows 
on bracts, a little on pedicels, and minute puberulence on pedicels. 
— Drier clayey spots in swamps or near water, or in clayey 
pockets about stumps of trees; especially struggling upward 
through tangles of smilax, blackberry and other thickety growth ; 
about Se. 10-20. 
In a season of prolonged drought it becomes greatly altered, 
the pedicels shorter, stouter, less curved, the inflorescence much 
more contracted, often but a single bunch. 
In the sun, fewer ovate leaves and more numerous cordate 
leaves seem to be produced. 
In case of interruption to its accustomed conditions, with drying- 
out of swamp lands (draining or clearing, or laying out streets), 
shorter leaves are developed which are of stunted little acuminate 
form with many cuneate wings. 
— Grows in company with A. ardens and A. Claytoni ; from 
the source of these it is apparently a recent offshoot. When 
typically developed, it has less percurrent axis, fewer cordations, 
thinner and larger leaves, than A. Claytoni, with narrower inflor- 
escence, and leaves and more forward-directed teeth than either 
that or A. ardens. 
Specimens include : 
CE » Riverside, Mianus R., Oc. 15, ’97. 
N. Y. `, Inwood, Se. 27 bai Van ignia — links, Oc. 2, ^97. 
Yonkers, ari swamp, Se. 15,’ a, S e. 798, Se. '99, Se. Fam a ge 
but obliterated by building, 1901. Bank beneath Split mde Se. '98; 
Lonesome, with 4. carmesinus, Se. 1903. 
WN Yy r., glen, Se. 8, ' 96. 
NC. pid tt Herb. Biltmore, no. 34, ‘‘ Aster —,” in hb. N. Y. Bot. 
Gar., etc. 
Pa., Bethlehem, in hb. Schweinitz ; two non-cordate fragments which seem to 
be of this ESSE and id so, the earliest specimens perhaps preserved ; Schweinitz wrote 
on his label, ** A. —?"' and later, in a blacker ink added ** 4. brachiatus Ly.” 
later hand substituted « * 4. corymbosus.”’ 
26? Branch-forms ; similar, with shorter leaves. 
