uber ▁is , ▁like ▁the ▁rest ▁of ▁the ▁plant , ▁poison ous . ▁ ▁Distribution ▁Dios core a ▁commun is ▁is ▁native ▁and ▁w ides p read ▁throughout ▁southern ▁and ▁central ▁Europe , ▁north west ▁Africa ▁and ▁western ▁Asia , ▁from ▁Ireland ▁to ▁the ▁Can ary ▁Islands , ▁east ▁to ▁Iran ▁and ▁Crime a . ▁ ▁Hab itat ▁Dios core a ▁commun is ▁is ▁a ▁typical ▁plant ▁of ▁the ▁forest ▁under story , ▁from ▁the ▁sea ▁to ▁the ▁mountains , ▁usually ▁in ▁dense ▁woods , ▁but ▁it ▁can ▁also ▁be ▁found ▁in ▁me adows ▁and ▁h ed ges . ▁ ▁Us es ▁ ▁All ▁components ▁of ▁the ▁black ▁b ry ony ▁plant , ▁including ▁the ▁tub ers , ▁are ▁poison ous ▁due ▁to ▁sap on in ▁content , ▁so ▁it ▁is ▁not ▁typically ▁used ▁internally ; ▁however , ▁it ▁has ▁been ▁used ▁as ▁a ▁pou lt ice ▁for ▁bru ises ▁and ▁infl amed ▁joint s . ▁It ▁has ▁been ▁suggested ▁that ▁black ▁b ry ony ▁be ▁used ▁top ically ▁with ▁ca ution , ▁due ▁to ▁a ▁t endency ▁for ▁the ▁plant ▁to ▁cause ▁pain ful ▁bl ister s . ▁ ▁Studies ▁have ▁isolated ▁calci um ▁ox al ate ▁depos its ▁and ▁hist am ines ▁in ▁the ▁ber ry ▁ju ice ▁and ▁rh iz om es , ▁which ▁may ▁contribute ▁to ▁skin ▁ir rit ation ▁and ▁contact ▁der mat itis ▁associated ▁with ▁black ▁b ry ony . ▁ ▁Black ▁Bry ony ▁is ▁highly ▁poison ous ▁and ▁should ▁not ▁be ▁ing ested ▁at ▁all ▁at