Equisetum robustum var. affine Engelmann
Equisetum robustum var. affine Engelmann is a synonym sensu FNA Ed. Comm., 1993 of:
Equisetum hyemale subsp. affine (Engelmann) Calder & Roy L. Taylor, an accepted subspecies name sensu FNA Ed. Comm., 1993.
Equisetum robustum var. affine Engelmann is a synonym sensu FNA Ed. Comm., 1993 of:
Equisetum hyemale subsp. affine (Engelmann) Calder & Roy L. Taylor, an accepted subspecies name sensu FNA Ed. Comm., 1993.