Achnatherum
needlegrass, ricegrass
8 species
5 subspecies and varieties
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Achnatherum hendersoniiHenderson's rice grass
Distribution: Yakima and Kittitas counties in Washington; south to Jefferson County, Oregon.
Habitat: Dry, rocky, shallow soil, in sagebrush or ponderosa pine.
Origin: Native
Flowers: May-June
Achnatherum hymenoidesIndian rice grass
Distribution: East of the Cascades in Washington; British Columbia south to California, east to Alberta and the Dakotas and Texas.
Habitat: Grasslands, desert plains, and foothills, especially on rocky or sandy soil.
Origin: Native
Flowers: May-June
Achnatherum lemmoniiLemmon's needlegrass
Distribution: Chiefly east of the Cascades in Washington; south-central British Columbia south to California, east to Montana and Arizona.
Habitat: Valleys to mid-elevations in the mountains, often in ponderosa pine forests.
Origin: Native
Flowers: May-June
ssp. lemmonii – Lemmon's needlegrass
Achnatherum nelsonii
Origin: Native
ssp. dorei – Nelson's needlegrass
ssp. nelsonii – Nelson's needlegrass
Achnatherum nevadenseNevada needlegrass
Origin: Native
Achnatherum occidentalecommon western needlegrass
Origin: Native
ssp. californicum – California needlegrass
ssp. pubescens – western needlegrass
Achnatherum richardsoniiRichardson's rice grass
Origin: Native
Flowers: June - July
Achnatherum thurberianumThurber's rice grass
Origin: Native
Flowers: Late May - June