Equisetum hyemale ssp. affine(Engelm.) Calder & Taylor3 of 27 American tall scouring rush
April 25,Great Meadows, Wayland
Heard Pond. Stout perennial stems of scouring-rush horsetail have been overwintering green. The stems typically promptly loose their teeth at nodes; light-colored bald spots are left in place of the teeth.