0 3 . ▁It ▁contains ▁more ▁than ▁ 2 0 0 ▁species ▁of ▁trees ▁and ▁wo ody ▁bush es ▁including ▁collections ▁of ▁A cer aceae , ▁Aqu ifolia ceae , ▁A rec aceae , ▁Bet ul aceae , ▁Ca es al pin ia ceae , ▁Corn aceae , ▁Cu press aceae , ▁E ben aceae , ▁Eric aceae , ▁Eu ph orb ia ceae , ▁Fab aceae , ▁F ag aceae , ▁G ink go aceae , ▁Ham am el id aceae , ▁Hi pp oc ast an aceae , ▁Jug land aceae , ▁Magn olia ceae , ▁Mor aceae , ▁ ▁Ny ss aceae , ▁Ole aceae , ▁Pin aceae , ▁Ros aceae , ▁Sal ic aceae , ▁Sci ad op ity aceae , ▁Tax odia ceae , ▁The aceae , ▁and ▁Ul ma ceae . ▁ ▁In ▁ 2 0 0 3 , ▁the ▁college ▁gained ▁membership ▁in ▁the ▁American ▁Public ▁Gard ens ▁Association . ▁This ▁formal ized ▁the ▁college ' s ▁status ▁as ▁an ▁ar bor et um , ▁opening ▁the ▁way ▁to ▁development ▁of ▁public ▁education , ▁out re ach , ▁and ▁research ▁programs , ▁as ▁well ▁as ▁continued ▁conservation ▁of ▁the ▁area . ▁ ▁Ernst ▁and ▁Mary ▁Be hr end , ▁the ▁original ▁own ers ▁of ▁the ▁P enn ▁State ▁Be hr end ▁property , ▁began ▁acqu iring ▁many ▁ex otic ▁trees , ▁including ▁trees ▁from ▁Asia , ▁when ▁they ▁lived ▁on ▁the ▁site . ▁The ▁first ▁major ▁gift ▁to ▁the ▁ar bor et um ▁was ▁from ▁the