Isotria verticillata (Muhlenberg ex Willdenow) Rafinesque. Large Whorled Pogonia, Large Five-leaves. Phen: Apr-Jul. Hab: Acidic, mesic to dry forests. Dist: ME and MI south to Panhandle FL and e. TX.

Origin/Endemic status: Native

Synonymy: = Ar, C, ETx1, F, FNA26, G, Il, K1, K3, K4, Mi, Mo1, NE, NY, Pa, RAB, S, Tn, Tx, Va, W, WV, Correll (1950), Luer (1975); = Pogonia verticillata (Muhl. ex Willd.) Nutt. – WH3

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