Jumpseed, Virginia Knotweed (Polygonum virginianum L.)

Family - Polygonaceae

A synonym is Tovara virginiana (L.) Raf.

Photographic Location: Sycamore Ridge Ranch, Middle TN

Stems - To +1m tall, non-woody, hairy above, glabrescent below, erect. The pubescence ferruginous.

Leaves - Alternate, petiolate, pubescent on both surfaces or glabrous below, ovate, to +15cm long, +8cm wide. Ocrea fringed with cilia, pubescent.

Inflorescence - Typically a terminal raceme, but some axillary, to 40cm long. Flowers loosely arranged on the inflorescnece.

Flowers - Perianth parts 4, whitish to pinkish, +/-3mm long, acute, glabrous. Stamens typically 4, slightly exserted. Filaments whitish, glabrous, 2mm long. Anthers pale yellow to whitish, -1mm long. Styles 2, persistent in fruit to form a "beak".

Flowering - July - October.
Habitat - Rich, moist woods.

Origin - Native to U.S.

Other info. - This species can be found throughout Tennessee. It is easy to identify in the field because of its hairy ocrea, big, alternate leaves, and long inflorescences. The plant is very common in shaded, rich areas.