416 COMPOSITAE. Vou. IIL. 
Wf 22. Aster sagittifolius Willd. Arrow- 
ss A" ae leaved Aster. Fig. 4303. 
LIN) ‘ttifoli F é 
Ve Wy, Aster sagittifolius Willd. Sp. Pl. 3: 2035. 1804. 
Stem stout, or slender, strict, glabrous, or spar- 
ingly pubescent above, 2°-5° high, paniculately 
branched at the inflorescence, the branches as- 
cending. Leaves thin, slightly roughened, or gla- 
brous above, glabrate or pubescent beneath, the 
lower and basal ones cordate or sagittate, ovate- 
lanceolate, sharply serrate, acuminate, 3’-6’ long, 
with slender naked or narrowly margined peti- 
oles; upper leaves lanceolate, sessile, or on short 
and usually margined petioles, serrate or entire, 
those of the branches very small; heads 23-4” 
high, 8’~10” broad, numerous, crowded, race- 
mose; involucre turbinate, its bracts linear-subu- 
late, glabrous or nearly so, their tips green and 
slightly spreading; rays 10-15, light blue or pur- 
plish, 3’-4” long; pappus whitish. 
In dry soil, New Brunswick to Ontario, North Da- 
kota, New Jersey, Georgia and Missouri. Aug.—Oct. 
Aster Saundersii Burgess, of the Dakotas and 
Towa, differs by a corymbose inflorescence. 
23. Aster undulatus L. Wavy-leaf 
Aster. Fig. 4304. 
Aster undulatus L. Sp. Pl. 875. 1753. 
Stem stiff, very rough and pubescent, divari- 
cately branched above, 1°-33° high. Leaves 
usually thick, rough on both sides, pubescent 
beneath, dentate, undulate or entire, acute or 
acuminate, the lowest and basal ones ovate, 
cordate, 2’-6’ long, with naked or margined 
petioles; middle ones ovate, lanceolate or ob- 
long, with margined petioles dilated and clasp- 
ing at the base, the upper sessile or clasping, 
those of the branches small and subulate; 
heads numerous, racemose and often secund 
on the spreading branches, about 4” high, 
8-10” broad; involucre broadly turbinate, its 
bracts linear-oblong, pubescent, acute or acut- 
ish, their green tips appressed; rays 8-15, pale 
blue to violet, 3-5” long; pappus whitish. 
In dry soil, New Brunswick and Ontario to 
Minnesota, Florida, Alabama, Louisiana and 
Arkansas. Various-leaved aster. Races differ in 
leaf-form and inflorescence. Sept.—Oct. 
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24. Aster patens Ait. Late Purple 
Aster. Purple Daisy. Fig. 4305. 
Aster patens Ait. Hort. Kew. 3: 201. 1789. 
A, patens gracilis Hook, Comp. Bot. Mag. 1: 97. 
1835. 
Stem slender, rough, 1°-3° high, diver- 
gently branched. Leaves ovate-oblong to 
oblong-lanceolate, rough or pubescent, thick 
and somewhat rigid, strongly cordate or 
auriculate-clasping at the broad base, entire, 
acute, or the lowest obtuse, 1-3’ long, those 
of the branches much smaller and bract-like, 
the margins rough-ciliate; heads 1’ broad or 
more, solitary at the ends of the branches; 
involucre broadly turbinate, its bracts linear- 
oblong, finely pubescent or scabrous and 
somewhat glandular, imbricated in several 
series, their green acute tips spreading; rays 
20-30, purplish-blue, or deep violet, 4-6” 
long; pappus tawny; achenes pubescent. 
In dry, open places, Maine to northern New 
York, Minnesota, Florida, Louisiana and Texas. 
Reported from Canada. Races differ in leaf- 
form and pubescence. Aug.—Oct. 
