You searched for: County Porter Remove constraint County: Porter Class Equisetopsida Remove constraint Class: Equisetopsida Order Equisetales Remove constraint Order: Equisetales Phylum or Division Equisetophyta Remove constraint Phylum or Division: Equisetophyta Scientific Name Equisetum arvense subsp. arvense Remove constraint Scientific Name: Equisetum arvense subsp. arvense