Variety: Silphium radula var. gracile Date: 1872-04-16 Country: United States
Institution: Royal Botanic Gardens, Kew Collection: Herbarium Basis of record: Preserved specimen Catalogue number: Herbarium:K001065869 View record
Variety: Silphium radula var. gracile Date: 1842-04-01 Country: United States
Institution: Royal Botanic Gardens, Kew Collection: Herbarium Basis of record: Preserved specimen Catalogue number: Herbarium:K002494721 View record
Variety: Silphium radula var. gracile Country: United States
Institution: Royal Botanic Gardens, Kew Collection: Herbarium Basis of record: Preserved specimen Catalogue number: Herbarium:K002494722 View record