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)

Family: Poaceae

Status: Native

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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