▁to ▁Nor folk ▁Island . ▁It ▁is ▁a ▁crit ically ▁end anger ed ▁species ▁under ▁the ▁Australian ▁Federal ▁government ' s ▁Environment ▁Prote ction ▁and ▁B iod iversity ▁Conserv ation ▁Act . ▁ ▁Description ▁ ▁A . ▁ar b ores c ens ▁is ▁a ▁soft - wood ed ▁tree ▁growing ▁up ▁to ▁a ▁height ▁of ▁ 9 ▁m . ▁Its ▁leaves ▁are ▁on ▁sl ender ▁stal ks ▁which ▁are ▁ 5 – 1 5   mm ▁long ▁and ▁have ▁hair s ▁lying ▁close ▁to ▁them ▁( app ress ed ▁hair s ). ▁The ▁leaf ▁bl ades ▁are ▁elli ptic ▁to ▁slightly ▁ob l ance olate , ▁ ▁and ▁from ▁ 5 0 – 8 0   mm ▁long ( s ometimes ▁ 3 0 – 1 0 0   mm ▁long ) ▁ ▁by ▁ 2 0 – 3 5   mm ▁broad ▁( with ▁the ▁ju ven ile ▁fol i age ▁being ▁larger ). ▁The ▁base ▁of ▁the ▁bla de ▁is ▁ac ute ▁and ▁at ten u ates ▁to ▁the ▁st alk . ▁The ▁leaf ▁marg ins ▁ ▁have ▁irregular ▁ ▁and ▁very ▁shall ow ly ▁rounded ▁teeth , ▁and ▁are ▁yellow - green ▁or ▁dark ▁green ▁above , ▁and ▁light ▁green ▁below . ▁The ▁marg ins ▁are ▁very ▁min utely ▁fr ing ed , ▁and ▁there ▁are ▁app ress ed ▁hair s ▁on ▁the ▁mid rib ▁beneath . ▁The ▁infl ores c ence ▁is ▁a ▁sp ike ▁and ▁is ▁terminal ▁on ▁the ▁side ▁branches . ▁ ▁It ▁has ▁a ▁covering ▁of