Robert W. Freckmann Herbarium

  Polygonum tenue Michx. image
Photographer: Emmet J. Judziewicz           

Emmet J. Judziewicz

Emmet J. Judziewicz
Family Polygonaceae
Polygonum tenue Michx.
pleat-leaf knotweed, slender knotweed
Polygonum: derived from the Greek words polys, "many," and gonu, "knee or joint," hence "many joints" because of the thickened joints on the stem
tenue: slender
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Status: Native
Plant: erect or sprawling, annual, 4"-16" tall, slender forb
Flower: white, petals and petal-like sepals joined at base and deeply cut; inflorescence usually 1 flower from each node; blooms July-Sept.
Fruit:black, dry, sharply 3-angled seed
Leaf:alternate, jointed at the base, linear with an awl-shaped tip, pleated with 2 folds near the middle
Habitat: dry; in acidic, sandy, or rocky soil

More Information Natural Communities Herbarium Specimens
All Polygonum list Google- Images or Text

Flora of North America (off site)
Polygonum tenue Michx. var. tenue

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