▁Se ed ▁Pl ants ▁of ▁the ▁Big ▁B end ▁G orge ▁of ▁Y alu ▁Ts ang po ▁in ▁S out heast ▁Tib et ▁by ▁H ang ▁and ▁Z hou . ▁He ▁performed ▁many ▁technical ▁reviews ▁for ▁the ▁National ▁Ar bor ▁Day ▁Foundation ' s ▁Library ▁of ▁Tre es ▁series , ▁and ▁supplied ▁photograph s ▁for ▁the ▁US ▁Forest ▁Service ▁Field ▁Guide ▁to ▁Native ▁Oak ▁Species ▁of ▁Eastern ▁North ▁America , ▁the ▁Belg ian ▁Guide ▁Illustr é ▁des ▁Chen es , ▁and ▁educational ▁post ers ▁and ▁web ▁pages ▁produced ▁by ▁the ▁Illinois ▁Department ▁of ▁Natural ▁Resources ▁and ▁the ▁Live ▁Oak ▁Society . ▁ ▁He ▁is ▁the ▁author ▁( with ▁Jim ▁Wilson ▁of ▁The ▁Vict ory ▁Garden ▁public ▁television ▁series ) ▁and ▁photograph er ▁for ▁Land sc aping ▁with ▁Native ▁Tre es . ▁He ▁prepared ▁a ▁compreh ensive , ▁ 5 5 0 - page ▁sequ el ▁to ▁that ▁volume ▁titled ▁Native ▁Tre es ▁for ▁North ▁American ▁Land sc apes , ▁released ▁in ▁January ▁ 2 0 0 4 , ▁which ▁won ▁national ▁awards ▁from ▁the ▁National ▁Ar bor ▁Day ▁Foundation ▁and ▁the ▁Council ▁on ▁Botan ical ▁and ▁H ort icult ural ▁L ibr aries . ▁Guy ▁was ▁a ▁contrib utor ▁to ▁the ▁World ▁List ▁of ▁Th re aten ed ▁Tre es ▁project ▁of ▁the ▁World ▁Conserv ation ▁Mon itor ing ▁Centre ▁in ▁Cambridge , ▁England ▁( fund ed ▁by ▁the ▁Government ▁of ▁the ▁Netherlands ) ▁and ▁served ▁as ▁a ▁tax onom ic ▁rev iewer ▁for ▁Qu erc us ▁in ▁Flora ▁of ▁North ▁America .