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Columbia Plateau

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Map Legend & Subregion List

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NameColor on MapEPA Code‡
Channeled Scablands10a
Loess Islands10b
Umatilla Plateau10c
Okanogan Drift Hills10d
Pleistocene Lake Basins10e
Dissected Loess Uplands10f
Yakima Folds10g
Palouse Hills10h
Deep Loess Foothills10i
Nez Perce Prairie10j
Deschutes/John Day Canyons10k
Lower Snake and Clearwater Canyons10l
Okanogan Valley10m
Umatilla Dissected Uplands10n

† Status: ✓ = Complete ○ = Needs Image … = Incomplete ∅ = Stub Only

This code refers to the US EPA's Level 4 ecoregion codes for the continental U.S., see here.

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Plant Lists & In-Region Search

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Warning! This region extends outside the continental US. We have only built range maps for the portion of plant ranges in the continental US; these lists and searches may thus have major omissions for species which only occur in the portion of this region outside the continental US.