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Rubiaceae
Diodia

not marked as a favorite taxon Diodia virginiana Linnaeus. Common name: Large Buttonweed. Phenology: Jun-Dec. Habitat: Ditches, wet fields, wet swales along highways, other moist to wet habitats. Distribution: CT, PA, IL, and KS south to FL and TX; West Indies; Mexico (YUC) and Central America.

Glossary (beta!)

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

Origin/Endemic status: Native

Synonymy ⓘ: = GrPl, K4, Sorrie (2016a); = n/a — Pa; > Diodia hirsuta Pursh — S; > Diodia tetragona Walter — S; < Diodia virginiana L. — Ar, C, F, Fl5, G, GW2, Il, Meso4.2, Mex, Mo3, NcTx, RAB, Tn, Va, W, WH3, WI, WV; > Diodia virginiana L. — S; > Diodia virginiana L. var. attenuata Fernald — F; > Diodia virginiana L. var. latifolia Torr. & A.Gray; > Diodia virginiana L. var. virginiana — F, NE; Diodia virginiana L. Basionym: Diodia virginiana L. 1753

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FAC (taxonomic lump from wetland indicator species)
  • Atlantic and Gulf Coastal Plain: FACW (taxonomic lump from wetland indicator species)
  • Eastern Mountains and Piedmont: FACW (taxonomic split from wetland indicator species)
  • Great Plains: OBL (taxonomic split from wetland indicator species)
  • Midwest: FACW (taxonomic split from wetland indicator species)
  • Northcentral & Northeast: FACW (taxonomic split from wetland indicator species)

Heliophily ⓘ: 8

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image #1 of Diodia virginiana© Bruce A. Sorrie | Original Image ⭷
image #2 of Diodia virginiana© Gary P. Fleming | Original Image ⭷
image #3 of Diodia virginiana© Joey Shaw source | Original Image ⭷
image #4 of Diodia virginiana© Bruce A. Sorrie | Original Image ⭷
image #5 of Diodia virginiana© Joey Shaw source | Original Image ⭷
image #6 of Diodia virginiana© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
image #7 of Diodia virginiana© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
image #8 of Diodia virginiana© Joey Shaw source | Original Image ⭷

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Horticultural Information

NCBG trait

Intro: Prostrate annual/perennial of ditches, wet fields and other moist to wet habitats.

Stems: Stems 4-sided, sprawling, branching from root crown, hairy at least on angles.

Leaves: Leaves opposite, sessile with linear stipules at the base, lance-shaped to narrowly oval, to 2 1/2 in. long, entire.

Inforescence:

Flowers: Flowers solitary in leaf axils, white (occasionally pink), about 1/4 in. long, funnel-shaped, with 4 spreading, pointed corolla lobes that are densely hairy inside.

Fruits: Fruit a green, 8-ribbed, ellipsoid drupe with persistent calyx lobes.

Comments:

Height: 4-18 in.

plant sale text:

bloom table text:

description: Prostrate annual/perennial of ditches, wet fields and other moist to wet habitats.

stems: Stems 4-sided, sprawling, branching from root crown, hairy at least on angles.

leaves: Leaves opposite, sessile with linear stipules at the base, lance-shaped to narrowly oval, to 2 1/2 in. long, entire.

inflorescence:

flowers: Flowers solitary in leaf axils, white (occasionally pink), about 1/4 in. long, funnel-shaped, with 4 spreading, pointed corolla lobes that are densely hairy inside.

fruits: Fruit a green, 8-ribbed, ellipsoid drupe with persistent calyx lobes.

comments:

cultural notes:

germination code:

native range: eastern United States



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