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Family	Scientific Name	Common Name	Habitat	Distribution
Caprifoliaceae	Triosteum angustifolium var. angustifolium	Smooth Lesser Horse-gentian	Mesic forests, bluffs, outcrops, especially over calcareous or mafic rocks.	CT west to ON and MO, south to NC, nw. GA (Jones & Coile 1988), AL, and LA.
Caprifoliaceae	Triosteum angustifolium var. eamesii	Hairy Lesser Horse-gentian	Mesic forests, bluffs, outcrops, especially over calcareous or mafic rocks.	CT and NJ south to NC.
Caprifoliaceae	Triosteum aurantiacum var. aurantiacum	Orange-fruited Horse-gentian	Woodlands and forests in circumneutral soils, particularly those over mafic or calcareous rocks.	QC west to MN, south to GA, KY, and OK; other varieties are more restricted and midwestern or northern in distribution.
Caprifoliaceae	Triosteum aurantiacum var. glaucescens		Woodlands and forests in circumneutral soils, particularly those over calcareous rocks or substrate.	NY and Pa west to IN.
Caprifoliaceae	Triosteum aurantiacum var. illinoense	Illinois Horse-gentian	Woodlands and forests in circumneutral soils, particularly those over mafic or calcareous rocks.	PA west to w. IA and se. NE, south to WV, c. KY, AR, and e. OK.
Caprifoliaceae	Triosteum perfoliatum	Perfoliate Horse-gentian	Woodlands and forests in circumneutral soils, particularly those over mafic or calcareous rocks.	MA west to MN, south to n. SC, n. GA (Jones & Coile 1988), and OK.

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