Flora of the Southeastern United States
2022 Edition

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GERANIACEAE

Geranium robertianum Linnaeus. Herb Robert. Phen: Jun-Oct. Hab: Rocky woodlands, especially over calcareous rocks. Dist: NF west to MB, south to e. MD, w. VA, e. WV, c. and e. TN, IN, IL, and MN; Europe, c. Asia, e. Asia, n. Africa, and naturalized elsewhere. Considered by some authors (such as C and G) to be introduced in North America, but apparently native based on its occurrence in remote and high quality natural communities with no other alien species and no likely means of introduction.

Origin/Endemic status: Native

Syn: = C, F, G, GrPl, Il, K1, K3, K4, Mi, NE, NY, Pa, Tn, W, WV, Aedo (2012), Aedo (2017); > Geranium robertianum ssp. robertianum – K2

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© Erik Danielsen

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© Bruce A. Sorrie

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© Gary P. Fleming