Photo: Heracleum mantegazzianum.

Closeup of seedhead. The sap of this one will give anybody a bad case of photosensitivity - first you get the sap on your skin, then you go out into the sun, then it starts to itch -and- hurt. Vantaa, Finland. Wild. 1992-06-01.
Heracleum mantegazzianum Sommier & Levier Engl.: giant hogweed, cartwheel-flower, giant cow parsnip. Deu.: Riesen-Bärenklau, Herkulesstaude, Kaukasischer Bärenklau, Mantegazzis Bärenklau. Suom.: kaukaasianjättiputki. Sven.: jätteloka, jättebjörnfloka, jättebjörnloka, jättefloka, kaukasisk björnloka, kaukasisk jättefloka. Fran.: berce de Mantegazzi, berce du Caucase. Ital.: panace di Mantegazzi. Dutch: kaukasische bereklauw, reuzenbereklauw. Bot. syn.: Heracleum giganteum Fisch. ex Hornem.
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Photo: Heracleum mantegazzianum.