PLANTS Profile for Polygonum douglasii (Douglas' knotweed)

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PLANTS Profile

Polygonum douglasii Greene
Douglas' knotweed

Symbol:

PODO4

Group:

Dicot

Family:

Polygonaceae

Duration:

Annual

Growth Habit:

Forb/herb

Native Status:

L48		N
CAN		N

Click on the image below to enlarge it and download a high-resolution JPEG file.

©Patrick J. Alexander. Provided by Patrick J. Alexander. Usage Requirements. Any use of copyrighted images requires notification of the copyright holder.

More Information:

Images:
Polygonum douglasii Greene

Click on a thumbnail to view an image, or see all the Polygonum thumbnails at the PLANTS Gallery

Distribution:
Polygonum douglasii Greene


View Native Status

See U.S. county distributions (when available) by clicking on the map or the linked states below:
USA (AZ, CA, CO, IA, ID, MD, ME, MI, MN, MT, ND, NE, NH, NM, NV, NY, OR, SD, UT, VT, WA, WY), CAN (AB, BC, MB, ON, QC, SK)

Related Taxa:
Polygonum douglasii Greene

View 33 genera in Polygonaceae, 80 species in Polygonum or click below on a thumbnail map or name for species profiles.

Polygonum douglasii ssp. austiniae
Austin knotweed

Polygonum douglasii ssp. douglasii
Douglas' knotweed

Polygonum douglasii ssp. engelmannii
Engelmann's knotweed

Polygonum douglasii ssp. johnstonii
Johnston's knotweed

Polygonum douglasii ssp. majus
large knotweed

Polygonum douglasii ssp. nuttallii
Nuttall's knotweed

Polygonum douglasii ssp. spergulariiforme
scatter knotweed

Native

Introduced

Classification:
Polygonum douglasii Greene

Click on a scientific name below to expand it in the PLANTS Classification Report.


Kingdom	Plantae – Plants
Subkingdom	Tracheobionta – Vascular plants
Superdivision	Spermatophyta – Seed plants
Division	Magnoliophyta – Flowering plants
Class	Magnoliopsida – Dicotyledons
Subclass	Caryophyllidae
Order	Polygonales
Family	Polygonaceae – Buckwheat family
Genus	Polygonum L. – knotweed
Species	Polygonum douglasii Greene – Douglas' knotweed

Threatened and Endangered Information:
Polygonum douglasii Greene

This plant and the related entities and synonyms italicized and indented below are listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete protected plant list for that location.

Iowa:
Douglas' knotweed		Endangered
Maine:
Douglas' knotweed		Threatened
New Hampshire:
Douglas' knotweed		Threatened
New York:
Douglas knotweed		Threatened
Vermont:
Douglas knotweed		Endangered
Washington:
Polygonum austiniae [=PODOA2]
Austin's knotweed		Sensitive

Wetland Indicator Status:
Polygonum douglasii Greene

Nat. Ind.

Reg. 1

Reg. 2

Reg. 3

Reg. 4

Reg. 5

Reg. 6

Reg. 7

Reg. 8

Reg. 9

Reg. 0

Reg. A

Reg. C

Reg. H

UPL,FAC

UPL

FACU

FAC

FACU-

UPL

FACU

Interpreting Wetland Indicator Status

More Accounts and Images:
Polygonum douglasii Greene

View photographs from CalPhotos.

View species account and distribution map from Flora of North America (FNA).

View taxonomic account from Integrated Taxonomic Information System (ITIS) for ITIS Taxonomic Serial Number 20891.

View species account and distribution map from Jepson Interchange (University of California - Berkeley).

View species account from Native American Ethnobotany (University of Michigan - Dearborn).

View 1 propagation protocol from Native Plants Network.

View species account, photographs, and distribution from University of Washington Burke Museum.

Time Generated: 10/26/2008 01:41 AM MDT