Cubelium concolor (T.F. Forster) Rafinesque ex Britton & A. Brown. Eastern Green-violet. Phen: Cleistogamous flowers: Apr-early May; late May-Jul. Chasmogamous flowers: Late May-Jun; May-Oct. Hab: Very nutrient-rich and mesic forests, especially over calcareous substrates such as limestone and dolomite, sometimes extending upslope into dry-mesic or even dry forests and woodlands when the soils are very basic. Dist: VT and s. ON west to MI and KS, south to SC, GA, Panhandle FL, s. AL, ne. MS, and AR.

Origin/Endemic status: Native

Synonymy ⓘ: = K4, S, S13, Ballard () (in prep), Ballard, Kartesz, & Nishino (2023); = Hybanthus concolor (T.F.Forst.) Spreng. – Ar, C, F, Fl2, FNA6, G, GrPl, Il, K1, K3, Mi, NE, NY, Pa, RAB, Tat, Tn, Va, W, WH3, WV, McKinney & Russell (2002)

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FACU (name change)
• Eastern Mountains and Piedmont: FACU (name change)
• Midwest: FACU (name change)
• Northcentral & Northeast: FACU (name change)

Heliophily ⓘ: 3