Plant Index

 
 
 
 

Polygonum tenue

Polygonum tenue Michx.

pleatleaf knotweed

Synonym(s): Polygonum tenue var. protrusum
Polygonum tenue (Pleatleaf Knotweed)
Image ID: 31220
Image by: Stanley, Jennifer
Image Collection: NCBG Digital Library

PLANT INDEX

ID_PLANT: POTE2
SCIENTIFIC NAME: Polygonum tenue
Include in WOTAS: 1
Publish to Web: 1
Last Modified: 2017-12-30

GENUS INDEX

GENUS CODE: POLYG4
GENUS SCIENTIFIC: Polygonum
GENUS AUTHORITY: L.
GENUS COMMON: Knotweed
GENUS SUMMARY: A genus of about 45 species, herbs, of temperate regions of the Northern Hemisphere. Based on morphology, Ronse Decraene, Hong, & Smets (2004) suggested that Polygonella should be merged into Polygonum, as part of section Duravia; the close relationship of Polygonella and Duravia was confirmed using molecular evidence by Schuster, Reveal, & Kron (2011).
GENUS IDENTIFICATION:
GENUS REFERENCES: Costea, Tardif, & Hinds in FNA (2005); Freeman in FNA (2005); Brandbyge in Kubitzki, Rohwer, & Bittrich (1993); Costea & Tardif (2003a)=X; Schuster, Reveal, & Kron (2011)=U; Nesom & Bates (1984)=Q; Wunderlin (1981)=V; Horton (1961)=T; Ronse Decraene, Hong, & Smets (2004); Brandbyge in Kubitzki, Rohwer, & Bittrich (1993). [also see Fallopia, Persicaria, Reynoutria]. Key adapted from FNA and other sources.

FAMILY INDEX

FAMILY CODE: POLYGO
FAMILY SCIENTIFIC: Polygonaceae
FAMILY AUTHORITY: A.L. de Jussieu 1789
FAMILY COMMON: Smartweed Family
FAMILY SUMMARY: A family of about 43-48 genera and 1100-1200 species, trees, shrubs, vines, and herbs, cosmopolitan, but especially north temperate. Recent changes in the circumscription of various genera (including Polygonum, Persicaria, Fallopia, etc.) have received strong support from molecular phylogenetic studies (Kim & Donoghue 2008; Lamb Frye & Kron 2003; Schuster, Reveal, & Kron 2011).
FAMILY REFERENCE: Freeman & Reveal in FNA (2005); Horton (1972)=Z; Mitchell & Dean (1978)=Y; Ronse Decraene & Akeroyd (1988); Brandbyge in Kubitzki, Rohwer, & Bittrich (1993); Lamb Frye & Kron (2003); Kim & Donoghue 2008).

NCBG DESCRIPTIVES

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.
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.
COMMENTS:
HEIGHT: 4-16 in.
DURATION:
HABIT:
LEAF ARRANGEMENT: Alternate
LEAF COMPLEXITY: Simple
LEAF RETENTION:
FLORAL CHARACTERISTICS
SYMMETRY:
BLOOM TIME: Jun-Oct
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
x x x x x

BLOOM COLOR: White
White Red Pink Orange Yellow Green Blue Lavender Purple Violet Brown Not Applicable
x x x x

FRUITING PERIOD:
DISTRIBUTION
HABITAT TYPE: Disturbed, Outcrops and glades, Woods margins
NATIVE RANGE:
HORTICULTURAL
Plant Sale Text:

Bloom Table Text:

NCBG Location:

Cultural Notes:

SOIL MOISTURE: Dry
LIGHT EXPOSURE: Sun, Part Shade
MINIMUM HARDINESS ZONE:
MAXIMUM HARDINESS ZONE:
GERMINATION CODE:
WILDLIFE VALUE:
DEER RESISTANCE:

USDA PLANTS DATABASE

USDA Symbol: POTE2
USDA Common Name: Pleatleaf Knotweed
Native Status: L48 (N), CAN (N)
Distribution: USA (AL, AR, CT, DC, DE, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, NC, NE, NH, NJ, NY, OH, OK, PA, RI, SC, SD, TN, TX, VA, VT, WI, WV, WY), CAN (ON, QC)
Duration: Annual
Growth Habit: Forb/herb

2018 Natural Heritage Program List of Rare Plant Species of North Carolina

NHP IDS RANKROUNDED S RANKG RANKROUNDED G RANKSTATE STATUSFEDERAL STATUS
19414 S2? S2 G5 G5 W7

This information is derived from the 2018 North Carolina Natural Heritage Program List of Rare Plant Species.

WEAKLEY FLORA

SCIENTIFIC NAME:
COMMON NAME:
SYNONYMY:
PHENOLOGY:
HABITAT:
COMMENTS:
RANGE MAP:

Key to Map Symbols
ABOUT FAMILY (Weakley Flora)
Polygonaceae A.L. de Jussieu 1789 (Smartweed Family)
SUMMARY: A family of about 43-48 genera and 1100-1200 species, trees, shrubs, vines, and herbs, cosmopolitan, but especially north temperate. Recent changes in the circumscription of various genera (including Polygonum, Persicaria, Fallopia, etc.) have received strong support from molecular phylogenetic studies (Kim & Donoghue 2008; Lamb Frye & Kron 2003; Schuster, Reveal, & Kron 2011).
REFERENCE: Freeman & Reveal in FNA (2005); Horton (1972)=Z; Mitchell & Dean (1978)=Y; Ronse Decraene & Akeroyd (1988); Brandbyge in Kubitzki, Rohwer, & Bittrich (1993); Lamb Frye & Kron (2003); Kim & Donoghue 2008).
ABOUT GENUS (Weakley Flora)
Polygonum L. (Knotweed)
SUMMARY: A genus of about 45 species, herbs, of temperate regions of the Northern Hemisphere. Based on morphology, Ronse Decraene, Hong, & Smets (2004) suggested that Polygonella should be merged into Polygonum, as part of section Duravia; the close relationship of Polygonella and Duravia was confirmed using molecular evidence by Schuster, Reveal, & Kron (2011).
REFERENCE: Costea, Tardif, & Hinds in FNA (2005); Freeman in FNA (2005); Brandbyge in Kubitzki, Rohwer, & Bittrich (1993); Costea & Tardif (2003a)=X; Schuster, Reveal, & Kron (2011)=U; Nesom & Bates (1984)=Q; Wunderlin (1981)=V; Horton (1961)=T; Ronse Decraene, Hong, & Smets (2004); Brandbyge in Kubitzki, Rohwer, & Bittrich (1993). [also see Fallopia, Persicaria, Reynoutria]. Key adapted from FNA and other sources.

HERBARIUM RESOURCES

SERNEC: Find Polygonum tenue in Southeast Regional Network of Experts and Collections (if available)
UNC SERNEC: Find Polygonum tenue in University of North Carolina Chapel Hill Herbarium - Southeast Regional Network of Experts and Collections (if available)

WEB RESOURCES

USDA: Find Polygonum tenue in USDA Plants
NPIN: Find Polygonum tenue in NPIN Database
FNA: Find Polygonum tenue in the Flora of North America (if available)
Google: Search Google for Polygonum tenue

IMAGE USE RECORDS

ID IMAGE: 31220 - Primary Image FloraQuest Plant Detail Page (Landscape Preferred)
ID IMAGE1: 31220 - Primary Image WOTAS
ID IMAGE2: 0 - Secondary Image WOTAS
ID IMAGE3: 0 - Primary Image Plant Sale Sign (Landscape Only)
ID IMAGE4: 0 - Primary Image New Plant Sale Label (Portrait Only)

From the Image Gallery


Image ID: 31217

Image ID: 31218

Image ID: 31219

Image ID: 31222

Image ID: 35526

Image ID: 31221

Image ID: 11726
8 photo(s) available in the Image Gallery

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