| Taxon | Festuca idahoensis |
| group | Monocots |
| Family | Poaceae |
| Family common name(s) | grass; true grass |
| Genus common name(s) | fescue; fescue-grass; fescue grass; fescuegrass; festuce |
| Species common name(s) | Idaho fescue; Idaho fescue-grass; Idaho fescue grass; Idaho blue fescue; Idaho bluebunch fescue; bluebunch fescue; blue-bunch fescue; blue bunch fescue; fescue blue bunchgrass; blue bunchgrass; blue bunch-grass; blue bunch grass; bunchgrass fescue |
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| Common name(s) specific to synonym; taxon noted in brackets | Roemer's fescue [Festuca roemeri]; Roemer's Idaho fescue [Festuca roemeri]; Roemer fescue [Festuca roemeri]; Roemer Idaho fescue [Festuca roemeri]Klamath Roemer's fescue [Festuca roemeri var. klamathensis]; Klamath Roemer fescue [Festuca roemeri var. klamathensis]; Klamath fescue [Festuca roemeri var. klamathensis]; southern Roemer's fescue [Festuca roemeri var. klamathensis]; southern Roemer fescue [Festuca roemeri var. klamathensis]; northern Roemer's fescue [Festuca roemeri var. roemeri]; northern Roemer fescue [Festuca roemeri var. roemeri] |
| Common name(s) generally applied to other taxa or multiple taxa | blue fescue is applied to multiple Festuca taxa; bunch grass, bunch-grass, bunchgrass, rescue-grass, rescue grass are applied to multiple Poaceae taxa; blue bunch wheat grass is more commonly applied to Elymus spicatus [Pseudoroegneria spicata] |
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| Synonymy: The Jepson Manual (1993), FNA, PLANTS, etc | subsp. roemeri (Pavlick) S.G. Aiken; Festuca roemeri (Pavlick) E.B. Alexeev; Festuca roemeri (Pavlick) E.B. Alexeevi var. klamathensis B.L. Wilson |
