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Polygonaceae
Polygonum

not marked as a favorite taxon Polygonum tenue Michaux. Common name: Glade Knotweed, Slender Knotweed. Phenology: Jul-Oct; Aug-Nov. Habitat: Glades, barrens, and thin, rocky soils, over various rock types (including granite, diabase, amphibolite, greenstone, metagabbro, and shale), also in dry sands. Distribution: ME, ON, MN, SD, WY, south to GA, AL, MS, LA, TX.

Glossary (beta!)

Section: Duravia.

Origin/Endemic status: Native

Synonymy ⓘ: = Ar, C, Can, FNA5, GrPl, Il, K4, Mi, Mo3, NcTx, NE, NY, Pa, RAB, S, S13, Tn, Tx, Va, W, WV, Horton (1972), Mitchell & Dean (1978); > Polygonum tenue Michx. var. protrusum Fernald — F, G; > Polygonum tenue Michx. var. tenue — F, G. Basionym: Polygonum tenue Michx. 1803

Links to other floras: = Polygonum tenue - FNA5

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Heliophily ⓘ: 9

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image #1 of Polygonum tenue© Armin Weise | Original Image ⭷
image #2 of Polygonum tenue© Alan M. Cressler | Original Image ⭷
image #3 of Polygonum tenue© Gary P. Fleming | Original Image ⭷
image #4 of Polygonum tenue© Aidan Campos source | Original Image ⭷
image #5 of Polygonum tenue© Jennifer Stanley | Original Image ⭷
image #6 of Polygonum tenue© Gary P. Fleming | Original Image ⭷
image #7 of Polygonum tenue© Alan Cressler: Polygonum tenue, Cowrock Mountain, Raven Cliffs Wilderness, Chattahoochee National Forest, White County, Georgia 1 by Alan Cressler source | Original Image ⭷
image #9 of Polygonum tenue© Armin Weise | Original Image ⭷
image #10 of Polygonum tenue© Radford, Ahles and Bell | Original Image ⭷

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Horticultural Information

NCBG trait

Intro: Erect-ascending annual of thin-soiled rocky woodlands, barrens, outcrops, dry sandy fields and roadsides.

Stems: Stems stiff, angled, branched from below and branches ascending, with somewhat swollen nodes, green to brownish, smooth or slightly rough.

Leaves: Leaves alternate, short-petiolate with a green to brownish membranous sheath (ocrea) where petiole joins stem, linear or narrowly lance-shaped, sharp-tipped, with a longitudinal furrow to either side of the mid-vein.

Inforescence:

Flowers: Flowers tucked singly or in pairs in upper, bract-like leaf axils and ocreas; white with green or pink; 1/8 in. long; consisting of 5 green, oblong-oval tepals with broad white or pinkish margins.

Fruits: Fruit a tiny, dark brown or black achene.

Comments:

Height: 4-16 in.

plant sale text:

bloom table text:

description: Erect-ascending annual of thin-soiled rocky woodlands, barrens, outcrops, dry sandy fields and roadsides.

stems: Stems stiff, angled, branched from below and branches ascending, with somewhat swollen nodes, green to brownish, smooth or slightly rough.

leaves: Leaves alternate, short-petiolate with a green to brownish membranous sheath (ocrea) where petiole joins stem, linear or narrowly lance-shaped, sharp-tipped, with a longitudinal furrow to either side of the mid-vein.

inflorescence:

flowers: Flowers tucked singly or in pairs in upper, bract-like leaf axils and ocreas; white with green or pink; 1/8 in. long; consisting of 5 green, oblong-oval tepals with broad white or pinkish margins.

fruits: Fruit a tiny, dark brown or black achene.

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