Diodia teres poorjoe; buttonweed Rubiaceae DITE; Bx, pb (DeCandido 2001); Q, i, j; R, cp;

Diodia teres large plant. © Copyright Bobby Hattaway 2011. Discover Life. discoverlife.org

Diodia teres large plant. © Copyright Bobby Hattaway 2011. Discover Life. discoverlife.org (Accessed 3/2018).

Diodia teres is an annual herb from a taproot, often sprawling, stems 20-80 cm long, 4-sided, hairy, rough-textured, often reddish in full sun; stipules between leaf bases with 5-8 reddish bristles to 1 cm long. 

Diodia teres plant in bloom. David G. smith. Delaware Wildflowers. delawarewildflowers.org

Diodia teres plant in bloom. David G. smith. Delaware Wildflowers. delawarewildflowers.org (Accessed 3/2018).

Leaves opposite, 2-5 cm long, 0.6 cm wide (Yatskievych 2006), narrow, stiff, sessile, bristle-tipped,. 

 

 

 

 

 

 

Diodia teres flower. David G. smith. Delaware Wildflowers. delawarewildflowers.org

Diodia teres flower. David G. smith. Delaware Wildflowers. delawarewildflowers.org (Accessed 3/2018).

Flowers white-purple, axillary, radially symmetrical, tubular, petal tube 4-lobed, 0.4-0.6 cm long; in upper axillary clusters of 1-3. 

Diodia teres fruiting stem. Copyright by- Shirley Denton Ph. D. The Institute for Regional Conservation, Delray Beach, FL. http///shirleydenton.com

Diodia teres fruiting stem. Copyright by- Shirley Denton Ph. D. The Institute for Regional Conservation, Delray Beach, FL. http///shirleydenton.com (Accessed 3/2018).

Fruit eventually dry, 0.3-0.6 cm long, round, hairy, tipped by persistent sepals, splitting into two nutlets. 

 

Wetland status: UPL. 

Frequency in NYC: Infrequent. 

Origin: Native. 

Habitat: Open, dry sand, soil, or fill, disturbed sites. 

NotesD. virginiana found in Conference House park in a flower bed (M. Feder p.c.)