Vascular Plants of the Gila Wilderness
Presented in Association with the
Western New Mexico University Department
of Natural Sciences
Achnatherum perplexum Hoge & Barkworth
(New Mexico Needlegrass)
Stipa columbiana of NM reports
Stipa minor sensu NM authors
Stipa perplexa (Hoge & Barkworth) J. Wipff & S.D. Jones
Achnatherum perplexum is a perennial New Mexico inhabitant of dry slopes. In Achnatherum perplexum, the inflorescence is born as a panicle, in which
most spikelets are on branchets off the central spike axis. The spikelets have one floret
each, and separate (disarticulate) above the glumes. The lemma is awned from the tip, and the
awns are peristent and 1-6 cm long and bent. The palea is 1/3 to 1/2 of the length of the lemma.
The apical lemma hairs are not erect.
Please click on an image for a larger file.
Achnatherum perplexum, photo Russ Kleinman, Bear Mtn., Nov. 2, 2008
Achnatherum perplexum, detail of spikelet, photo Russ Kleinman & Bill Norris, Bear Mtn., Nov. 11, 2007
Achnatherum perplexum, growth habit, photo Russ Kleinman, Bear Mtn., Nov. 2, 2008
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