Genus Heracleum Species giganteum Author K.Sprengel Published place Halle (Halensis) Published year 1807 (index plantarum...) Published in K.Sprengel in: Index plantarum quae in horto botanico Halensi anno 1807: 35 Original seen in Berlin (BG), Leiden (L) photocopy Notes [post 13 Nov 1807]