More info for the terms: codominant, shrub
Tall threetip sagebrush is commonly associated with bluebunch wheatgrass
(Pseudoroegneria spicata), Idaho fescue (Festuca idahoensis),
needle-and-thread grass (Hesperostipa comata), Sandberg bluegrass (Poa secunda), and Thurber's needlegrass (Achnatherum thurberianum). Common shrub associates of threetip sagebrush
include big sagebrush (Artemisia tridentata), broom snakeweed (Guterrezia sarothrae),
green rabbitbrush (Chrysothamnus viscidiflorus), gray horsebrush
(Tetradymia canescens), and curlleaf mountain-mahogany (Cercocarpus
ledifolius) [55]. Stands of tall threetip sagebrush often occur adjacent to
mountain big sagebrush (A. t. spp. vaseyana)
stands [6], but usually on moister soils at higher elevations
[10]. Threetip sagebrush typically occurs at elevations above Wyoming big
sagebrush but below mountain big sagebrush [11]. Threetip sagebrush stands are often more uniform with plants more closely spaced than in big sagebrush stands [46].
Publications listing tall threetip sagebrush as a
dominant, codominant, or indicator species include the following:
Habitat types of the Curlew National Grassland, Idaho [20]
Steppe vegetation of Washington [22]
Wildlife habitat on managed rangelands--the Great Basin of southeastern
Oregon: plant communities
and their importance to wildlife [24]
Sagebrush-grass habitat types of southern Idaho [31]
An ecological study of sagebrush in interior British Columbia [36]
Plant communities of the Similkameen Valley, British Columbia [40]
Grassland and shrubland habitat types of western Montana [42]
An area of pristine vegetation in Craters of the Moon National Monument, Idaho [63]
Wyoming threetip sagebrush: This taxon commonly occurs with slimstem muhly (Muhlenberia filiculmis) [62].
The following publication lists Wyoming threetip sagebrush as a dominant species:
Grassland and shrubland habitat types of the Shoshone National Forest [64]