Thalictrum amphibolum Greene. Section: Leucocoma. 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
Syn: = K4; = Thalictrum revolutum – Ar, C, F, G, GW2, Il, K1, K3, Mi, Mo3, NE, NY, RAB, S, Va, W, WH3, WV; < Thalictrum revolutum – FNA3, Pa