Not an accepted name (status: rejected). The accepted name is Equisetum × meridionale (Milde ) Chiov., 1929.

Equisetum × naegelianum W.Koch ex Rothm., 1944 2% complete

No common name

Feddes Repert. Spec. Nov. Regni Veg. 54: 81 (1944)

There is no corrections for Equisetum × naegelianum yet.