Polygonella articulata jointweed Polygonaceae POAR4; Q, j; K, gt, m, pl; R;

Polygonella articulata.Janet Novak.www.ct-botanical-society.org

Polygonella articulata. © 2004 Janet Novak.www.ct-botanical-society.org (Accessed 4/2014).

Polygonella articulata is an annual herb, slender, wiry, to 50 cm tall from a taproot, pale-waxy, branched above, leaf sheaths truncate at each node; branches appear jointed at outer ends. Winter plant reddish-brown. Stipule (ocrea) sleeve-like around stem above leaf stalk (Flora of North America 1993+). 

Leaves linear, alternate, edges rolled back, to 2 cm long, 0.1 cm wide, base jointed at juncture with sheath. 

Flowers pink-white, radially symmetrical, to 0.2 cm, 5 petals, 8 stamens, each flower above a tiny, sheathing bract; inflorescences unbranched, to 3.5 cm long; blooming and fruiting Aug.-Oct. 

Fruit dry, 1-seeded achene 0.2 cm. 

Wetland status: UPL. 

Frequency in NYC: Infrequent. 

Origin: native. 

Habitat: Open, dry, sandy soil of coastal areas.