Photo: Equisetum hyemale.

Look, Ma, no branches! Chiricahuas, AZ, US. Wild. 1998-04-01.
Equisetum hyemale L. Engl.: scouring rush, scouringrush horsetail, common scouring-rush, rough horsetail, shavegrass. Deu.: Winter-Schachtelhalm. Suom.: kangaskorte. Sven.: skavfräken, skurfräken, skäfte. Bot. syn.: Equisetum affine Engelm., Equisetum praealtum Raf., Equisetum robustum A. Braun, Hippochaete hyemalis (L.) Bruhin
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Photo: Equisetum hyemale.