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not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Nuttall) Semple in J. C. Semple et al. +
spatulate;ovate or obovate +
clasping +  and sheathing +
attenuate +
indurate +
Tripolium subg. Astropolium +
1-nerved +  and petiolate +
subulate;linear;subulate;linear;lanceolate +
rugulose +  and muricate +
barbellulate +  and barbellate +
sessile +  and subpetiolate +
not 2-lipped +  and actinomorphic +
purplish +  and reddish or pinkish +
at maturity , more or less ampliate , tubes usually shorter +
beaked +, 2-ribbed +  and 5-ribbed +
glabrate +  and strigillose +
compressed +, narrowly obovoid +  and fusiform +
fertile +  and bisexual +
fertile +  and bisexual +
North America +  and worldwide +
strigillose +, glabrous +, stipitate-glandular +  and hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
disciform +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
campanulate;hemispheric +
0.85 cm8.5 mm <br />0.0085 m <br /> (0.95 cm9.5 mm <br />0.0095 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
5mm;8.5mm +
1.2mm;2mm +
sessile +  and petiolate +
cauline +  and basal +
decurrent +
spreading;erect +
lanceolate +, triangular +  and deltate +
shallowly serrate or crenate +  and entire +
not +  and hyaline +
ciliate +  and scabrous +
entire +, crenate +  and serrate +
2-carpellate +
white +  and brownish +
persistent +
25 +  and 40 +
oblanceolate or spatulate +  and linear +
in J. C. Semple et al., Cult. Native Asters Ontario, +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
sundberg1986a +
exalbuminous +
branched +  and simple +
not brittle +
ascending +  and erect +
hairy +, glabrate +  and glabrous +
appendaged +  and truncate +
papillate +  and smooth +
Aster sect. Hesterastrum +, Aster sect. Oxytripolium +, Undefined subg. Conyzanthus +, Symphyotrichum sect. Oxytripolium +  and Tripolium sect. Oxytripolium +
Symphyotrichum subg. Astropolium +
Symphyotrichum +
subgenus +
at maturity , more or less ampliate , tubes usually shorter +
ampliate +
rhizomatous +, taprooted +  and eglandular +
perennial +  and annual +
2 cm20 mm <br />0.02 m <br /> (200 cm2,000 mm <br />2 m <br />) +
tree +, shrub +  and subshrub +
spatulate +  and oblanceolate-rhombic or rhombic +