Reynoutria sachalinensis

Classification	Dicots
Family	Polygonaceae
Family (Traditional)	Polygonaceae
Genus	Reynoutria
Species:	Reynoutria sachalinensis (F. Schmidt ex Maxim.) Nakai
Common Name	Giant Knotweed
Growth Habit	forb
Plant Notes	**
Characteristics	Armaments: No; Milky Sap: No; Photosynthetic: Yes; Stipules: Yes; Woody Herbaceous: Herbaceous; Duration: Perennial; General Ecology: Terrestrial; Growth Habit: forb; Region of Origin: Asia; Reproductive Phenology: July; Reproductive Phenology: August; Reproductive Phenology: September; Reproductive Phenology: October; Leaf Arrangement: alternate; Leaf Complexity: simple; Leaf Fragrance: No; Leaf Persistance: Deciduous; Leaflet Number: 0; Base Flower Color: White; Fruit Dehiscence: No; Fruit Type: Achene; Fruit Wet/Dry: Dry; Hypanthium Present: No; Ovary Position: Superior; Overall Flower Symmetry: Actinomorphic; Perianth Present: Yes; Placentation Type: Basal; Sexuality: monoclinous; Sporangium Arrangement: N/A
C value	N/A
Status	Not Native; AGCP (UPL), EMP (UPL) (NWPL)
Specimen(s)	View and Download Specimen Details »

** Not applicable or data not available.

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Species Distribution Map

This species has been reported in the counties highlighted in the interactive distribution map below. Click on a county to display the its name. Click the question mark icon () to view additional information about the ecoregions shown. In the map legend, there are links to toggle the visibility of the ecoregions and/or their labels. In addition, clicking on an ecoregion name will highlight that region on the map.

State Boundaries
Counties
Counties - Species Present

Ecoregions

Southeastern Plains
- Blackland Prarie
Blue Ridge Mountains
Ridge and Valley
Cumberland Plateau
Cumberland Mountains
Allegheny Plateau

Interior Plateau
- Bluegrass Region
- Nashville Basin
- Pennyroyal Karst Plain
- Western Highland Rim
- Eastern Highland Rim

Interior River Valleys and Hills
- Shawnee / Caseyville Hills
Mississippi Alluvial Plain
Mississippi Valley Loess Plains
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Synonyms

No synonyms exist for this species.

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort.

Counties included on distribution map: Johnson (KY), Trigg (KY), Montgomery (TN), Unicoi (TN)

Herbaria represented by specimen data listed below: APSC, UCHT

Range of years during which specimens were collected: 1987 - 1987

Accession No. (click for full details)	County	State	Coll. Date	Collector & Collection No.	Herbarium & Herbarium Name Used
APSC0058961	Unicoi	Tennessee			APSC Reynoutria sachalinensis
UCHT035700	Unicoi	Tennessee			UCHT Reynoutria sachalinensis
UCHT035699	Unicoi	Tennessee			UCHT Reynoutria sachalinensis
APSC0007319	Trigg	Kentucky	02 Sep 1987	Edward Chester	APSC Reynoutria sachalinensis
APSC0058962	Unicoi	Tennessee			APSC Reynoutria sachalinensis
APSC0007321	Montgomery	Tennessee			APSC Reynoutria sachalinensis
APSC0093516	Johnson	Kentucky			APSC Reynoutria sachalinensis
APSC0007320	Montgomery	Tennessee			APSC Reynoutria sachalinensis
APSC0093517	Johnson	Kentucky			APSC Reynoutria sachalinensis

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Reynoutria sachalinensis

Related Links

Species Distribution Map

Ecoregions

Synonyms

Specimens and Distribution

Plant Photos