▁it ▁respond s ▁to ▁disease ▁and ▁other ▁ab i otic ▁factors . ▁Management ▁of ▁this ▁species ▁as ▁an ▁invas ive ▁in ▁Europe ▁is ▁unclear , ▁although ▁water ▁regime ▁is ▁important ▁and ▁may ▁be ▁manip ulated ▁to ▁control ▁the ▁plant ▁as ▁well ▁as ▁her b ic ides ▁ ▁History ▁ ▁It ▁is ▁clear ▁that ▁J unc us ▁dich ot om us ▁has ▁increased ▁its ▁range ▁substantial ly ▁due ▁to ▁human ▁a ided ▁dispers al . ▁Although ▁the ▁bi oge ographic ▁history ▁of ▁J . ▁dich ot om us ▁is ▁somewhat ▁unclear ▁due ▁in ▁part ▁to ▁its ▁similar ities ▁with ▁other ▁gram ino id ▁species . ▁ ▁References ▁ ▁dich ot om us ▁Category : Fl ora ▁of ▁North ▁America ▁Category : Fl ora ▁of ▁Central ▁America ▁Category : Fl ora ▁of ▁South ▁America ▁Category : Pl ants ▁described ▁in ▁ 1 8 1 7 <0x0A> </s> ▁F ault ▁blocks ▁mountain ▁or ▁simply ▁block ▁mountains ▁that ▁are ▁very ▁large ▁blocks ▁of ▁rock , ▁sometimes ▁hundreds ▁of ▁kilometres ▁in ▁extent , ▁created ▁by ▁t ect onic ▁and ▁local ized ▁str esses ▁in ▁the ▁Earth ' s ▁cr ust . ▁Lar ge ▁areas ▁of ▁bed rock ▁are ▁broken ▁up ▁into ▁blocks ▁by ▁fault s . ▁ ▁Block s ▁are ▁character ized ▁by ▁relatively ▁uniform ▁l ith ology . ▁ ▁The ▁largest ▁of ▁these ▁fault ▁blocks ▁are ▁called ▁cr ust al ▁blocks . ▁Lar ge ▁cr ust al ▁blocks ▁broken ▁off ▁from ▁t ect onic ▁pl ates ▁are ▁called ▁ter ran es . ▁Those ▁ter ran es ▁which