familyPoaceae
subfamilyPoaceae subfam. Pooideae
genusAchnatherum
speciesAchnatherum nelsonii
subspeciesAchnatherum nelsonii subsp. nelsonii
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.
Discussion
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
None.
Lower Taxa
None.
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