*Euphorbia davidii Subils. David’s Spurge. Phen: Jun-Oct. Hab: Streambanks, riverbanks, bottomland forests, bottomland prairies, upland prairies, also in disturbed areas such as ditches, roadsides, and other open, disturbed areas. Dist: WI west to WY, south to c. TX, NM, AZ, and south into Mexico, and also introduced more widely.

Origin/Endemic status: W. North America

Other Comments: Introduced in se. TN (Chester, Wofford, & Kral 1997).

Synonymy: = Ar, FNA12, K1, K3, K4, Mi, NcTx, NY, Govaerts, Frodin, & Radcliffe-Smith (2000); = Euphorbia dentata Michx. var. gracillima Millsp.; = n/a – Il, Pa, RAB; < Euphorbia dentata Michx. – C

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