Flora of the Southeastern United States
2022 Edition

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RUBIACEAE

Diodia virginiana Linnaeus. Large Buttonweed. Phen: Jun-Dec. Hab: Ditches, wet fields, wet swales along highways, other moist to wet habitats. Dist: CT, PA, IL, and KS south to FL and TX; West Indies; Mexico and Central America.

ID notes: The leaves frequently turn bright yellow, caused by a viral infection.

Origin/Endemic status: Native

Syn: = GrPl, K4, Sorrie (2016); > Diodia hirsuta – S; > Diodia tetragona – S; < Diodia virginiana – Ar, C, Fl5, G, GW2, Il, K3, Meso4.2, Mo3, NcTx, RAB, Tn, Va, W, WH3, WI, WV; > Diodia virginiana – S; > Diodia virginiana var. attenuata – F, K1; > Diodia virginiana var. latifolia – K1; > Diodia virginiana var. virginiana – F, K1, NE

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image of plant© Gary P. Fleming [image randomly selected]
image of plant© Richard & Teresa Ware [image randomly selected]
image of plant© Bruce A. Sorrie [image randomly selected]
image of plant© Joey Shaw [image randomly selected]