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Triosteum aurantiacum E.P. Bicknell var. illinoense (Wiegand) E.J. Palmer & Steyermark. Illinois Horse-gentian. Phen: May-Jul; Aug-Oct. Hab: Woodlands and forests in circumneutral soils, particularly those over mafic or calcareous rocks. Dist: PA west to w. IA and se. NE, south to WV, c. KY, AR, and e. OK.

Origin/Endemic status: Native

Synonymy: = Ar, C, F, K1, K3, K4, Mo2; = Triosteum illinoense (Wiegand) Rydb. – Il; = Triosteum perfoliatum L. var. illinoense Wiegand – G; < Triosteum aurantiacum E.P.Bicknell – Mi, Pa, Backlund et al. (2002); < Triosteum perfoliatum L. var. aurantiacum (E.P.Bicknell) Wiegand – GrPl

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Heliophily ?: 6

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image of plant© Daniel Pohl, some rights reserved (CC BY-NC), uploaded by Daniel Pohl source CC-BY-NC | Original Image ⭷ Warning: was NOT research grade.
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image of plant© Linda Gurgone, some rights reserved (CC BY-NC), uploaded by Linda Gurgone source CC-BY-NC | Original Image ⭷ Warning: was NOT research grade.
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image of plant© Derek Ziomber, some rights reserved (CC BY-NC-SA), uploaded by Derek Ziomber source CC-BY-NC-SA, permission granted to NCBG | Original Image ⭷

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