OF THE CAROLINAS & GEORGIA

Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Lamiids: Gentianales

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Diodia virginiana   FAMILY Rubiaceae   Go to FSUS key



(?) PLANTS NATIONAL DATABASE:
Diodia virginiana   FAMILY Rubiaceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)

Diodia virginiana

INCLUDING Floristic Synthesis of North America (Kartesz, 1999)

Diodia virginiana var. attenuata

INCLUDING Floristic Synthesis of North America (Kartesz, 1999)

Diodia virginiana var. latifolia

INCLUDING Floristic Synthesis of North America (Kartesz, 1999)

Diodia virginiana var. virginiana

INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 173-03-001:

Diodia virginiana   FAMILY Rubiaceae

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)

Diodia hirsuta

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)

Diodia tetragona

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)

Diodia virginiana

 

COMMON NAME:
Virginia Buttonweed, Large Buttonweed


         To see larger pictures, click or hover over the thumbnails.

image of Diodia virginiana, Virginia Buttonweed, Large Buttonweed

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_divi3_001_lvd

        

image of Diodia virginiana, Virginia Buttonweed, Large Buttonweed

USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide    pnd_divi3_005_lvd

        

image of Diodia virginiana, Virginia Buttonweed, Large Buttonweed

JK Marlow    jkm160515_662

May    McCormick County    SC

image of Diodia virginiana, Virginia Buttonweed, Large Buttonweed

JK Marlow    jkm0507n_27

July    Greenville County    SC

Leaves are sessile and opposite; flowers 1 (rarely 2) per leaf axil, per Guide to the Wildflowers of SC, 1st ed. (Porcher & Rayner, 2001).

image of Diodia virginiana, Virginia Buttonweed, Large Buttonweed

JK Marlow    jkm160726_032

July    Polk County    NC

Pearson's Falls

Two 4-6mm long, linear-lanceolate sepals (vs. D. teres has 4 sepals), per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

image of Diodia virginiana, Virginia Buttonweed, Large Buttonweed

JK Marlow    jkm230706_4228

July    Pickens County    SC

Glassy Mountain Heritage Preserve

The white salverform flowers are sessile and borne in the leaf axils, per Wildflowers of Tennessee (Carman, 2005).

image of Diodia virginiana, Virginia Buttonweed, Large Buttonweed

JK Marlow    jkm080816_021

August    Greenville County    SC

Thin, narrowly lanceolate leaves up to 2" long, per Wildflowers of the Southern Mountains (Smith, 1998).

image of Diodia virginiana, Virginia Buttonweed, Large Buttonweed

JK Marlow    jkm080816_025b

August    Greenville County    SC

image of Diodia virginiana, Virginia Buttonweed, Large Buttonweed

JK Marlow    jkm080816_025c

August    Greenville County    SC

Connate stipules are one of the distinctive features of Rubiaceae, per Plant Systematics (Simpson, 2010).

image of Diodia virginiana, Virginia Buttonweed, Large Buttonweed

JK Marlow    jkm160826_002

August    Greenville County    SC

image of Diodia virginiana, Virginia Buttonweed, Large Buttonweed

Richard and Teresa Ware    rtw_diodia_virginiana

August        

The four stamens alternate with the four petals; the style is cleft, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

 

 

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Diodia virginiana   FAMILY Rubiaceae

(?) PLANTS NATIONAL DATABASE:
Diodia virginiana   FAMILY Rubiaceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Diodia virginiana

INCLUDING Floristic Synthesis of North America (Kartesz, 1999)
Diodia virginiana var. attenuata

INCLUDING Floristic Synthesis of North America (Kartesz, 1999)
Diodia virginiana var. latifolia

INCLUDING Floristic Synthesis of North America (Kartesz, 1999)
Diodia virginiana var. virginiana

INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 173-03-001:
Diodia virginiana   FAMILY Rubiaceae

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Diodia hirsuta

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Diodia tetragona

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Diodia virginiana

 

Find by SCIENTIFIC NAME:

470

Forb
Perennial

Habitat: Ditches, wet fields, wet swales along highways, other moist to wet habitats, per Weakley's Flora

Native to the Carolinas & Georgia

Common

map
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.

LEAVES:
Simple
Opposite
Margins entire

FLOWER:
Summer/Fall
White
Radially symmetrical
4-merous
2-lobed calyx
4-lobed salverform corolla
4 stamens
Bisexual

FRUIT:
Summer/Fall

 

TO LEARN MORE about this plant, look it up in a good book!



 


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