Achnatherum nelsonii subsp. nelsonii

Common names: Nelson's needlegrass
Synonyms: Stipa columbiana var. nelsonii
Treatment appears in FNA Volume 24. Treatment on page 124.
Calluses sharp, acute to acuminate, glabrous tips 0.05-0.15 mm, dorsal boundary of the glabrous tip and the callus hairs acute; awns 19-45 mm.


Achnatherum nelsonii subsp. nelsonii intergrades with subsp. dorei in Montana and Wyoming, and with A. occidentale subsp. pubescens in California. Its range extends from Idaho and Montana south to Nevada. It tends to grow at lower elevations than subsp. dorei.

Selected References


Lower Taxa


AuthorMary E. Barkworth +
Authority(Scribn.) Barkworth +
Common nameNelson's needlegrass +
DistributionAriz. +, Colo. +, N.Mex. +, Tex. +, Utah +, Calif. +, Oreg. +, Mont. +, Wyo. +, Wash. +, Alta. +, B.C. +, Sask. +, Yukon +, Nev. +, Idaho + and S.Dak. +
Illustration copyrightUtah State University +
IllustratorCindy Roché +
ReferenceNone +
Source xml grained fna xml/V24/V24 169.xml +
SynonymsStipa columbiana var. nelsonii +
Taxon familyPoaceae +
Taxon nameAchnatherum nelsonii subsp. nelsonii +
Taxon parentAchnatherum nelsonii +
Taxon ranksubspecies +
VolumeVolume 24 +