Calopogon oklahomensis D.H. Goldman. Oklahoma Grass-pink. Phen: Mar-Jul. Hab: Pine savannas, prairies. Dist: E. SC south to s. GA, west to e. TX, north in the eastern Great Plains to MN; disjunct eastward in the Eastern Highland Rim and Cumberland Plateau of TN (Tennessee Flora Committee 2015).

Origin/Endemic status: Native

Synonymy: = Ar, ETx1, FNA26, Il, K3, K4, Mo1, NcTx, Tn, Goldman, van den Berg, & Griffith (2004), Trapnell, Hamrick, & Giannasi (2004); < Calopogon pulchellus R.Br. – F, RAB, Tx; < Calopogon tuberosus (L.) Britton, Sterns, & Poggenb. – C

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