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Species Information

Below is an alphabetical listing (by scientific name) of some of the invasive species in our region. (Click on the column header to sort by that column).

Tier 4 - Widespread species are common in this region as well as in most surrounding areas.
Tier 3 - Established species are relatively widespread throughout the region but may not be present in neighboring regions.
Tier 2 - Emerging species are not yet widespread in the region but may be locally common.
Tier 1 - Threat species not yet reported in the region.

Species (Scientific)sort descending Species (Common) Status Type Websites
Pennisetum alopecuroides Fountain grass Tier 1 - Threat
Perilla frutescens Beefsteak plant Tier 2 - Emerging
Persicaria perfoliata (Polygonum perfoliatum) Mile-a-minute, Asiatic tearthumb Tier 3 - Established Penn State, College of Agricultural Sciences
Petasites hybidus Butterbur Tier 5 - Watch
Petasites japonicus Fuki, Butterbur Tier 5 - Watch
Phalaris arundinacea Reed canarygrass Tier 4 - Widespread, Montana Department of Natural Resources, USDA NRCS, Invasive Plant Atlas
Phellodendron amurense Amur corktree Tier 2 - Emerging GoBotany
Photinia villosa Oriental Photinia Tier 2 - Emerging
Phragmites australis Common reed grass Tier 4 - Widespread Penn State, College of Agricultural Sciences , GoBotany, IPANE, USDA National Agricultural Library
Populus alba White poplar Tier 5 - Watch
Potamogeton crispus Curly-leaf pondweed Tier 4 - Widespread GoBotany, IPANE, Global Invasive Species Database, USGS GLANSIS
Primula japonica Japanese primrose Tier 2 - Emerging
Prunus avium Bird cherry Tier 4 - Widespread GoBotany, Invasive Plant Atlas, The Plant List
Pueraria montana Kudzu Tier 2 - Emerging GoBotany
Pyrus calleryana Bradford pear Tier 3 - Established
Reynoutria japonica (Fallopia japonica, Polygonum cuspidatum) Japanese Knotweed Tier 3 - Established Penn State, College of Agricultural Sciences
Reynoutria sachalinensis (Fallopia sachalinensis) Giant knotweed Tier 5 - Watch
Reynoutria x bohemica (Fallopia x bohemica, Polygonum x bohemica) Bohemian knotweed Tier 4 - Widespread King County, Weed Control Handbook, Invasive Plant Atlas
Rhamnus cathartica Common buckthorn Tier 4 - Widespread GISP/ISSP , Go Botany, IPANE, Global Invasive Species Database
Rhodotypos scandens Black jetbead (jetbead) Tier 3 - Established