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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
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value:

External Links






State Rank Reason (see State Rank above)
Part of the Japanese Knotweed Complex
 
General Description
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Range Comments
Non-native, most common in North America along the coasts and somewhat inland; increasingly widespread in MT (Kartesz in prep. 2012).

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