▁garden ing ▁exper ts ▁as ▁" s illy ". ▁ ▁Et ym ology ▁Cort ader ia ▁is ▁derived ▁from ▁the ▁Spanish - Ar gent ine ▁name ▁‘ c ort ad era ’ , ▁meaning ▁‘ c utter ’ , ▁in ▁reference ▁to ▁the ▁sharp ▁leaf ▁marg ins . ▁ ▁S ello ana ▁is ▁named ▁for ▁Friedrich ▁S ellow ▁( 1 7 8 9 - 1 8 3 1 ), ▁a ▁German ▁botan ist ▁and ▁natural ist ▁from ▁P ots dam ▁who ▁worked ▁as ▁a ▁plant ▁collect or ▁in ▁Brazil . ▁He ▁studied ▁the ▁fl ora ▁of ▁South ▁America , ▁especially ▁that ▁of ▁Brazil . ▁The ▁specific ▁ep ith et ▁s ello ana ▁was ▁given ▁by ▁Josef ▁August ▁and ▁Julius ▁Hermann ▁Sch ult es ▁in ▁ 1 8 2 7 . ▁ ▁Neg ative ▁Imp act ▁P amp as ▁grass ▁is ▁fast - g row ing ▁and ▁can ▁form ▁large ▁masses ▁along ▁the ▁roads , ▁cl iffs , ▁river b anks , ▁and ▁open ▁areas ▁that ▁have ▁been ▁dist urbed ▁by ▁human ▁activities ▁or ▁natural ▁dist urban ces . ▁P amp as ▁grass ▁can ▁dis place ▁native ▁plants ▁and ▁create ▁their ▁habit ats , ▁which ▁de ple te ▁b iod iversity ▁. ▁The ▁bla de - like ▁leaves ▁may ▁cause ▁physical ▁harm ▁to ▁the ▁birds ▁who ▁feed ▁off ▁of ▁it . ▁The ▁plant ▁also ▁compet es ▁with ▁other ▁native ▁plants ▁by ▁mon opol izing ▁resources ▁like ▁sh ade , ▁sun light , ▁and ▁ground ▁nut ri ents . ▁Because ▁of ▁the ▁large ▁surface ▁area