You searched for: Collection herbarium Remove constraint Collection: herbarium Country United States Remove constraint Country: United States County Porter Remove constraint County: Porter Class Equisetopsida Remove constraint Class: Equisetopsida Kingdom Plantae Remove constraint Kingdom: Plantae Phylum or Division Equisetophyta Remove constraint Phylum or Division: Equisetophyta Scientific Name Equisetum arvense subsp. arvense Remove constraint Scientific Name: Equisetum arvense subsp. arvense