Ecological Section Listing
| Powder River Basin |  |
| Acer negundo / Prunus virginiana Forest Box elder / chokecherry Forest |
| Agrostis stolonifera Herbaceous Vegetation Redtop Meadow |
| Andropogon gerardii - Schizachyrium scoparium Western Great Plains Herbaceous Vegetation Big bluestem - little bluestem Western Great Plains Herbaceous Vegetation |
| Andropogon hallii - Calamovilfa longifolia Herbaceous Vegetation Sand bluestem - prairie sandreed Sand Prairie |
| Andropogon hallii - Carex inops ssp. heliophila Herbaceous Vegetation Sand bluestem - sun sedge Sand Prairie |
| Artemisia cana / Hesperostipa comata Shrub Herbaceous Vegetation Silver sagebrush / needle-and-thread Shrub Prairie |
| Artemisia cana / Pascopyrum smithii Shrubland Silver sagebrush / western wheatgrass Shrubland |
| Artemisia cana ssp. cana / Pascopyrum smithii Shrub Herbaceous Vegetation Silver sagebrush / western wheatgrass Shrub Prairie |
| Artemisia longifolia - Calamovilfa longifolia Sparse Vegetation Long-leaved Sage - Prairie Sandreed Sparse Vegetation |
| Artemisia pedatifida - Atriplex gardneri Dwarf Shrubland Birdfoot sagebrush - Gardner's saltbush Shrubland |
| Artemisia tridentata ssp. tridentata / Pascopyrum smithii Shrubland Basin big sagebrush / western wheatgrass Shrubland |
| Artemisia tridentata ssp. tridentata / Pseudoroegneria spicata Shrub Herbaceous Vegetation Basin big sagebrush / bluebunch wheatgrass Shrubland |
| Artemisia tridentata ssp. vaseyana / Pseudoroegneria spicata Shrubland Mountain big sagebrush / bluebunch wheatgrass Shrubland |
| Artemisia tridentata ssp. wyomingensis / Bouteloua gracilis Shrubland Wyoming big sagebrush / blue grama Shrubland |
| Artemisia tridentata ssp. wyomingensis / Carex filifolia Shrubland Wyoming big sagebrush / thread leaf sedge Shrubland |
| Artemisia tridentata ssp. wyomingensis / Pascopyrum smithii Shrub Herbaceous Vegetation Wyoming big sagebrush / western wheatgrass Shrubland |
| Artemisia tridentata ssp. wyomingensis / Pseudoroegneria spicata Shrub Herbaceous Vegetation Wyoming big sagebrush / bluebunch wheatgrass Shrub Herbaceous Vegetation |
| Artemisia tridentata ssp. wyomingensis / Pseudoroegneria spicata Shrubland Wyoming big sagebrush / bluebunch wheatgrass Shrubland |
| Atriplex gardneri / Artemisia tridentata Dwarf Shrubland Gardner's saltbush - big sagebrush Dwarf-shrubland |
| Atriplex gardneri / Pascopyrum smithii Dwarf Shrubland Gardner's saltbush / western wheatgrass Dwarf-shrubland |
| Calamovilfa longifolia - Carex inops ssp. heliophila Herbaceous Vegetation Prairie sandreed - sun sedge Prairie |
| Calamovilfa longifolia - Hesperostipa comata Herbaceous Vegetation Prairie sandreed - needle-and-thread Prairie |
| Carex nebrascensis Herbaceous Vegetation Nebraska sedge Wet Meadow |
| Carex utriculata Herbaceous Vegetation Beaked sedge Wet Meadow |
| Crataegus douglasii Shrubland Black hawthorn Shrubland |
| Crataegus succulenta Shrubland Succulent Hawthorn Shrubland |
| Dasiphora fruticosa / Festuca idahoensis Shrub Herbaceous Vegetation Shrubby cinquefoil / Idaho fescue Shrub Herbaceous Vegetation |
| Deschampsia cespitosa Herbaceous Vegetation Tufted hairgrass Meadow |
| Distichlis spicata Herbaceous Vegetation Inland saltgrass Saline Prairie |
| Elaeagnus commutata / Pascopyrum smithii Shrubland American Silverberry / Western Wheatgrass Shrubland |
| Eleocharis palustris Herbaceous Vegetation Common spikerush Wet Meadow |
| Festuca idahoensis - Carex inops ssp. heliophila Herbaceous Vegetation Idaho fescue - sun sedge Mixedgrass Prairie |
| Festuca idahoensis - Pascopyrum smithii Herbaceous Vegetation Idaho fescue - western wheatgrass Mixedgrass Prairie |
| Fraxinus pennsylvanica / Prunus virginiana Forest Green ash / chokecherry Forest |
| Glyceria borealis Herbaceous Vegetation Northern mannagrass Wet Meadow |
| Hesperostipa comata - Bouteloua gracilis - Carex filifolia Herbaceous Vegetation Needle-and-thread - blue grama Mixedgrass Prairie |
| Hesperostipa comata - Carex filifolia Herbaceous Vegetation Needle-and-thread - threadleaf sedge Herbaceous Vegetation |
| Hesperostipa comata - Carex inops ssp. heliophila Herbaceous Vegetation Needle-and-thread - sun sedge Mixedgrass Prairie |
| Hordeum jubatum Herbaceous Vegetation Foxtail barley Meadow |
| Juncus balticus Herbaceous Vegetation Baltic rush wet Meadow |
| Juniperus horizontalis / Carex inops ssp. heliophila Dwarf Shrubland Creeping juniper / sun sedge Dwarf-shrubland |
| Juniperus horizontalis / Schizachyrium scoparium Dwarf-shrubland Creeping juniper / little bluestem Dwarf-shrubland |
| Juniperus scopulorum / Piptatherum micranthum Woodland Rocky Mountain juniper / little-seed ricegrass Woodland |
| Juniperus scopulorum / Pseudoroegneria spicata Woodland Rocky Mountain juniper / bluebunch wheatgrass Woodland |
| Krascheninnikovia lanata / Hesperostipa comata Dwarf Shrubland Winter Fat / needle-and-thread Dwarf-shrub Prairie |
| Pascopyrum smithii - Bouteloua gracilis - Carex filifolia Herbaceous Vegetation Western wheatgrass - blue grama - threadleaf sedge Herbaceous Vegetation |
| Pascopyrum smithii - Distichlis spicata Herbaceous Vegetation Western wheatgrass - inland saltgrass Saline Prairie |
| Pascopyrum smithii - Eleocharis spp. Herbaceous Vegetation Western wheatgrass - spikerush spp. Mixedgrass Prairie |
| Pascopyrum smithii - Nassella viridula Herbaceous Vegetation Western wheatgrass - green needlegrass Mixedgrass |
| Pascopyrum smithii Herbaceous Vegetation Western wheatgrass Mixedgrass Prairie |
| Pascopyrum smithii -Hordeum jubatum Herbaceous Vegetation Western wheatgrass - foxtail barley Saline Prairie |
| Phalaris arundinacea Western Herbaceous Vegetation Reed canary-grass Wet Meadow |
| Phragmites australis Temperate Herbaceous Vegetation Western reed Marsh |
| Pinus ponderosa / (Andropogon gerardii, Schizachyrium scoparium) Woodland Ponderosa pine / big bluestem Woodland |
| Pinus ponderosa / Carex inops ssp. heliophila Woodland Ponderosa pine / sun sedge Woodland |
| Pinus ponderosa / Cornus sericea Woodland Ponderosa pine / red-oiser dogwood Wetland Woodland |
| Pinus ponderosa / Crataegus douglasii Woodland Ponderosa pine / black hawthorn Woodland |
| Pinus ponderosa / Festuca idahoensis Woodland Ponderosa pine / Idaho fescue Woodland |
| Pinus ponderosa / Juniperus communis Woodland Ponderosa pine / common juniper Woodland |
| Pinus ponderosa / Juniperus horizontalis Woodland Ponderosa pine / creeping juniper Woodland |
| Pinus ponderosa / Juniperus scopulorum Woodland Ponderosa pine / Rocky Mountain juniper Woodland |
| Pinus ponderosa / Mahonia repens Forest Ponderosa pine / Oregon grape Forest |
| Pinus ponderosa / Prunus virginiana Forest Ponderosa pine / chokecherry Forest |
| Pinus ponderosa / Pseudoroegneria spicata Woodland Ponderosa pine / bluebunch wheatgrass Woodland |
| Pinus ponderosa / Schizachyrium scoparium Woodland Ponderosa pine / little bluestem Woodland |
| Poa palustris Herbaceous Vegetation Fowl bluegrass Mixedgrass Prairie |
| Polygonum amphibium Herbaceous Vegetation Water smartweed Wetland |
| Populus angustifolia / Cornus sericea Woodland Narrowleaf cottonwood / red-oiser dogwood Forest |
| Populus deltoides / Cornus sericea Forest Plains cottonwood / red-oiser dogwood Forest |
| Populus deltoides / Symphoricarpos occidentalis Woodland Plains cottonwood / western snowberry Woodland |
| Populus tremuloides / Mahonia repens Forest Quaking aspen / Oregon grape Forest |
| Populus tremuloides Tall Forbs Forest Quaking aspen / Tall Forbs Forest |
| Prunus virginiana Shrubland Chokecherry Shrubland |
| Pseudoroegneria spicata - Bouteloua curtipendula Herbaceous Vegetation Bluebunch wheatgrass - sideoats grama Mixedgrass |
| Pseudoroegneria spicata - Carex filifolia Herbaceous Vegetation Bluebunch wheatgrass - thread-leaved sedge Mixed Prairie |
| Pseudoroegneria spicata - Pascopyrum smithii Herbaceous Vegetation Bluebunch wheatgrass - western wheatgrass Mixedgrass |
| Pseudoroegneria spicata - Poa secunda Herbaceous Vegetation Bluebunch wheatgrass - Sandberg's bluegrass Mixedgrass |
| Rhus trilobata / Carex filifolia Shrub Herbaceous Vegetation skunk bush sumac / thread-leaved sedge Shrub Prairie |
| Rhus trilobata / Festuca idahoensis Shrub Herbaceous Vegetation skunk bush sumac / Idaho fescue Shrub Herbaceous Vegetation |
| Rhus trilobata / Pseudoroegneria spicata Shrub Herbaceous Vegetation skunk bush sumac / bluebunch wheatgrass Shrub Prairie |
| Rhus trilobata / Schizachyrium scoparium Shrub Herbaceous Vegetation Skunk bush sumac / little bluestem Shrub Prairie |
| Rosa woodsii Shrubland Wood's rose Shrubland |
| Salicornia rubra Herbaceous Vegetation Red Saltwort Herbaceous Vegetation |
| Salix amygdaloides Woodland Peach-leaf willow Woodland |
| Salix bebbiana Shrubland Bebb's Willow Shrubland |
| Salix exigua Temporarily Flooded Shrubland Sandbar willow Shrubland |
| Sarcobatus vermiculatus / Artemisia tridentata Shrubland Black greasewood / big sagebrush Shrubland |
| Sarcobatus vermiculatus / Atriplex gardneri Shrubland Black greasewood / Gardiner saltbush Shrubland |
| Sarcobatus vermiculatus / Leymus cinereus Shrubland Black greaswood / Basin wildrye Shrubland |
| Sarcobatus vermiculatus / Pascopyrum smithii Shrub Herbaceous Vegetation Black greasewood / western wheatgrass - (thickspike wheatgrass) Shrub Prairie |
| Sarcobatus vermiculatus / Pseudoroegneria spicata Shrubland Black greasewood / bluebunch wheatgrass Shrubland |
| Schizachyrium scoparium - Bouteloua (curtipendula, gracilis) / Carex filifolia Herbaceous Vegeta Northern Great Plains little bluestem Prairie |
| Schizachyrium scoparium - Carex inops ssp. heliophila Herbaceous Vegetation Little bluestem - sun sedge bunchgrass Prairie |
| Schizachyrium scoparium - Muhlenbergia cuspidata Herbaceous Vegetation Little bluestem - plains muhly Herbaceous Vegetation |
| Scirpus maritimus Herbaceous Vegetation Alkali bulrush Marsh |
| Scirpus tabernaemontani Temperate Herbaceous Vegetation Softstem bulrush Temperate Herbaceous Vegetation |
| Shepherdia argentea Shrubland Buffaloberry Shrubland |
| Spartina pectinata - Carex spp. Herbaceous Vegetation Prairie Cordgrass - Sedge Wet Meadow |
| Spartina pectinata - Scirpus pungens Herbaceous Vegetation Prairie cordgrass - bulrush Wet Meadow |
| Spartina pectinata western Herbaceous Vegetation Prairie Cordgrass Western Herbaceous Vegetation |
| Sporobolus airoides Herbaceous Vegetation Alkali sacaton Southern Plains grassland |
| Sporobolus cryptandrus Shrub Herbaceous Vegetation Sand dropseed Shrub Prairie |
| Symphoricarpos occidentalis Shrubland Western snowberry Shrubland |
| Yucca glauca / Calamovilfa longifolia Shrub Herbaceous Vegetation Yucca / prairie sandreed Shrub Prairie |
