end ul ous ▁in ▁form . ▁ ▁P ests ▁and ▁dise ases ▁Some ▁examples ▁of ▁the ▁hy brid ▁possess ▁a ▁moder ate ▁resistance ▁to ▁Dutch ▁el m ▁disease . ▁ ▁Cult iv ation ▁The ▁hy brid ▁has ▁been ▁introduced ▁to ▁North ▁America ▁and ▁Austral asia . ▁ ▁Notable ▁trees ▁The ▁great ▁el m ▁in ▁The ▁Gro ve ▁of ▁Mag d alen ▁College , ▁Oxford , ▁photograph ed ▁by ▁Henry ▁Ta unt ▁in ▁ 1 9 0 0 , ▁long ▁believed ▁to ▁be ▁a ▁w ych ▁el m ▁before ▁being ▁identified ▁by ▁El w es ▁ ▁as ▁a ▁' V eg eta '- type ▁hy brid , ▁was ▁for ▁a ▁time ▁the ▁largest ▁el m ▁known ▁in ▁Britain ▁before ▁it ▁was ▁blow n ▁down ▁in ▁ 1 9 1 1 . ▁It ▁measured ▁ 4 4   m ▁tall , ▁its ▁tr unk ▁at ▁breast ▁height ▁being ▁ 2 . 6   m ▁in ▁diameter , ▁and ▁compr ised ▁an ▁estimated ▁ ▁of ▁tim ber , ▁making ▁it ▁the ▁largest ▁tree ▁of ▁any ▁kind ▁in ▁Britain ▁and ▁possibly ▁the ▁largest ▁north ▁of ▁the ▁Al ps . ▁However , ▁as ▁El w es ▁pointed ▁out , ▁its ▁calculated ▁age ▁would ▁place ▁its ▁plant ing ▁in ▁the ▁late ▁ 1 7 th ▁or ▁early ▁ 1 8 th ▁century , ▁long ▁before ▁the ▁introduction ▁of ▁the ▁Hun ting don ▁el m , ▁making ▁the ▁tree ▁in ▁question ▁more ▁likely ▁to ▁be ▁a ▁Ch ich ester ▁el m . ▁A ▁second ▁tree ▁nearby , ▁described ▁by ▁El