[ Equisetum hyemale variety affine (Engelm.) A.A. Eaton]
      
no HD illustration available (m3)
Equisetum hyemale (Engelm.) A.A. Eaton var. affine {-1} Equisetaceae
D.S. Correll, H.B. Correll, Aquatic Wetl. Pl. SW U.S.: , fig. 6.2 (1972) [J.W. Roller]