Thalictrum amphibolum Greene. Section: Leucocoma. Skunk Meadowrue, Waxy Meadowrue. Phen: May-Aug. Hab: Mesic to dry forests, woodlands, barrens, and prairies, over hornblende, greenstone, dolostone, and serpentinized olivine. Dist: QC and ON south to n. FL, LA, and TX, and scattered southwest to CO, NV, and AZ.

Origin/Endemic status: Native

Taxonomy Comments: The name T. revolutum is illegitimate, as de Candolle cited T. pubescens Pursh in synonymy when he named it; it must be replaced by T. amphibolum Greene.

Other Comments: The species is normally stipitate-glandular or papillose, but can be glabrous, as accounted for in the key.

Synonymy ⓘ: = K4; = Thalictrum purpurascens L. – S13, misapplied; = Thalictrum revolutum DC. – Ar, C, F, Fl2, G, GW2, Il, K1, K3, Mi, NE, NY, RAB, S, Tat, Va, W, WH3, WV; < Thalictrum revolutum DC. – FNA3, Pa

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FAC (name change)
• Eastern Mountains and Piedmont: FAC (taxonomic split from wetland indicator species)
• Great Plains: FACW (taxonomic split from wetland indicator species)
• Midwest: FAC (taxonomic split from wetland indicator species)
• Northcentral & Northeast: FAC (taxonomic split from wetland indicator species)

Heliophily ⓘ: 7