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Montana Field Guide

Montana Field Guides

Giant Knotweed - Polygonum sachalinense
Other Names:  Fallopia sachalinensis

Noxious Weed: Priority 1B
Exotic Species (not native to Montana)

Global Rank: GNR
State Rank: SNA
* (see State Rank Reason below)

Agency Status
MNPS Threat Rank:

External Links

State Rank Reason (see State Rank above)
Part of the Japanese Knotweed Complex
General Description
We do not yet have descriptive information on this species.  Please try the buttons above to search for information from other sources.

Range Comments
Non-native, most common in North America along the coasts and somewhat inland; increasingly widespread in MT (Kartesz in prep. 2012).

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Citation for data on this website:
Giant Knotweed — Polygonum sachalinense.  Montana Field Guide.  .  Retrieved on , from