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Symphyotrichum puniceum var. puniceum  
Family: Asteraceae
purplestem aster
[Aster calderi B. Boiv., moreAster conduplicatus Burgess, Aster firmus Nees, Aster forwoodii S. Wats., Aster puniceus L., Aster puniceus subsp. firmus (Nees) A.G. Jones, Aster puniceus var. calderi (B. Boivin) Lepage, Aster puniceus var. calvus Shinners, Aster puniceus var. compactus Fern., Aster puniceus var. demissus Lindl., Aster puniceus var. firmus (Nees) Torr. & A.Gray, Aster puniceus var. lucidulus A.Gray, Aster puniceus var. oligocephalus Fern., Aster puniceus var. perlongus Fern., Symphyotrichum puniceum var. calderi (B. Boivin) G.L. Nesom]
Symphyotrichum puniceum var. puniceum image
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Luc Brouillet, John C. Semple, Geraldine A. Allen, Kenton L. Chambers, Scott D. Sundberg+ in Flora of North America (vol. 20)
Plants 7-200+ cm. Stems usually sparsely to ± densely hirsute, often glabrescent, sometimes glabrate proximally, sometimes entirely so (hirsute in lines in arrays). Leaves: abaxial faces paler than adaxial, with a dark, distinct reticulum, adaxial without impressed main veins; array leaves usually equal to mid cauline. 2n = 16, 32. Flowering Aug-Oct. Wet soils, often peaty, open to moderately shaded, margins of alluvial deciduous woods and alder thickets, swamp margins, edges of bogs, stream and lake shores, marshes, wet meadows, early-melting coastal or riparian snowbeds with boreal forbs (northern alpine and subarctic regions), roadside and drainage ditches; 0-2000 m; St. Pierre and Miquelon; Alta., B.C., Man., N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Sask.; Ala., Conn., Del., Ga., Ill., Ind., Iowa, Maine, Md., Mich., Minn., Mo., Nebr., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Pa., R.I., S.C., S.Dak., Tenn., Vt., Va., W.Va., Wis.; introduced in Europe. The following forms that pertain to var. puniceum are not recognized here: Aster puniceus forma blandus (Pursh) Lepage, forma candidus Fernald, forma colbyi Shinners, forma demissus (Lindley) Fernald, forma etiamalbus Venard, and forma rufescens Fassett. Variety calderi is a dwarf morphotype at the northern limit of the range that does not deserve taxonomic recognition. Hybrids of var. puniceum with the following species have been reported: Symphyotrichum lanceolatum (probably A. tardiflorus Linnaeus var. lancifolius Fernald), S. lateriflorum, S. urophyllum, and S. cordifolium.

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Symphyotrichum puniceum var. puniceum
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