Polygonum tenue Michaux. Section: Duravia. 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.
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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© Armin Weise | Original Image ⭷
© Alan M. Cressler | Original Image ⭷
© Gary P. Fleming | Original Image ⭷
© Aidan Campos source | Original Image ⭷
© Jennifer Stanley | Original Image ⭷
© Gary P. Fleming | Original Image ⭷
© Alan Cressler: Polygonum tenue, Cowrock Mountain, Raven Cliffs Wilderness, Chattahoochee National Forest, White County, Georgia 1 by Alan Cressler source | Original Image ⭷
© Armin Weise | Original Image ⭷
© Radford, Ahles and Bell | Original Image ⭷Feedback
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Horticultural Information
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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cultural notes:
germination code:
native range:
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