festuca roemeri
http://www1.dnr.wa.gov/nhp/refdesk/communities/pdf/fero-seri.pdf
FESTUCA ROEMERI - SERICOCARPUS RIGIDUS
Roemer’s fescue - white-top aster
Abbreviated Name: FERO-SERI
Synonym: Festuca idahoensis var. roemeri - Aster curtus
Sample size = 20 plots
DISTRIBUTION: This association represents most of what
remains of native prairies in the southern Puget Sound area.
Historically, there were probably other native prairie associations
in this area. It is located in southwestern Pierce County, Thurston
County, and the Chehalis River valley in the far eastern end of
Grays Harbor County. It probably formerly also occurred in Lewis
County in the vicinity of Centralia, and may have occurred on
prairie soils in Mason County.
GLOBAL/STATE STATUS: G1S1. There are less than 20 remaining occurrences and they are highly threatened by invasion of nonnative species, fire suppression, and development.
ID TIPS: Dominated or co-dominated by Roemer’s fescue. Whitetop aster, houndstongue hawkweed, prairie lupine, Idaho blue-eyed
grass, or sickle-keeled lupine usually present. Level or mounded
topography on glacial outwash in southern Puget Sound area.
ENVIRONMENT: These sites are moderately dry and appear to
be relatively nutrient-rich. Occurs on flat or mounded (Mima
mounds) plains of recessional glacial outwash. Soils are deep
and excessively drained, typically gravelly or extremely gravelly
sandy loam in texture.
Precipitation: 38-64 inches (mean 50)
Elevation: 50-560 feet
Aspect/slope: level or mounded
Slope position: plains
Soil series: Spanaway, Spanaway-Nisqually complex
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