▁an ▁in ex ha ust ible ▁fl ore ▁of ▁new ▁forms ". ▁Writing ▁in ▁ 1 8 4 4 ▁the ▁prominent ▁American ▁landscape ▁gard ener ▁Andrew ▁Jackson ▁Down ing ▁comments : ▁" stra ight ▁can als , ▁round ▁or ▁ob long ▁pieces ▁of ▁water , ▁and ▁all ▁the ▁regular ▁forms ▁of ▁the ▁geometric ▁mode ▁... ▁would ▁evidently ▁be ▁in ▁violent ▁opposition ▁to ▁the ▁whole ▁character ▁and ▁expression ▁of ▁natural ▁landscape ". ▁ ▁In ▁his ▁extensive ▁travel s ▁in ▁South ▁America , ▁Alexander ▁von ▁H umb old t ▁became ▁the ▁first ▁to ▁concept ual ize ▁a ▁natural ▁landscape ▁separate ▁from ▁the ▁cultural ▁landscape , ▁though ▁he ▁does ▁not ▁actually ▁use ▁these ▁terms . ▁Andrew ▁Jackson ▁Down ing ▁was ▁aware ▁of , ▁and ▁sympath etic ▁to , ▁H umb old t ' s ▁ideas , ▁which ▁therefore ▁influenced ▁American ▁landscape ▁garden ing . ▁ ▁Sub sequently , ▁the ▁ge ograph er ▁Otto ▁Schl ü ter , ▁in ▁ 1 9 0 8 , ▁argued ▁that ▁by ▁defining ▁ge ography ▁as ▁a ▁Land schaft sk unde ▁( lands cape ▁science ) ▁would ▁give ▁ge ography ▁a ▁logical ▁subject ▁matter ▁shared ▁by ▁no ▁other ▁discipline . ▁He ▁defined ▁two ▁forms ▁of ▁landscape : ▁the ▁Ur land schaft ▁( original ▁landscape ) ▁or ▁landscape ▁that ▁existed ▁before ▁major ▁human ▁induced ▁changes ▁and ▁the ▁Kultur land schaft ▁( c ult ural ▁landscape ) ▁a ▁landscape ▁created ▁by ▁human ▁culture . ▁Schl ü ter ▁argued ▁that ▁the ▁major ▁task ▁of ▁ge ography ▁was ▁to ▁trace ▁the ▁changes ▁in ▁these ▁two