us ▁is ▁most ▁frequently ▁observed . ▁J unc us ▁dich ot om us ▁can ▁occur ▁in ▁dry ▁sites ▁but ▁it ▁th riv es ▁best ▁in ▁so ils ▁that ▁are ▁d amp , ▁such ▁as ▁a ▁road side ▁d itch es ▁where ▁run off ▁is ▁frequent . ▁ ▁Hab itat / distribution ▁ ▁J unc us ▁dich ot om us ▁is ▁native ▁and ▁distributed ▁widely ▁in ▁the ▁Amer icas ▁in ▁temper ate ▁zones ▁but ▁has ▁been ▁reported ▁as ▁introduced ▁in ▁other ▁temper ate ▁climate ▁zones . ▁ ▁J unc us ▁dich ot om us ▁is ▁a ▁more ▁special ized ▁species ▁least ▁tempor arily ▁wet ▁habit ats : ▁river b anks , ▁p ond ▁marg ins , ▁de press ions ▁in ▁he ath s , ▁sometimes ▁also ▁near ▁rice ▁fields . ▁Flow ering ▁and ▁fruit ing ▁occurs ▁in ▁late ▁spring — sum mer ▁in ▁d itch es , ▁sh ores , ▁clear ings , ▁and ▁other ▁typically ▁open ▁areas , ▁usually ▁in ▁sand y , ▁well - dra ined ▁( but ▁frequently ▁wet ) ▁soil . ▁J unc us ▁dich ot om us ▁usually ▁grows ▁in ▁sand y ▁so ils . ▁Any ▁habitat ▁that ▁hold ▁sufficient ▁ground water ▁with ▁stable ▁temper ate ▁temper atures , ▁then ▁this ▁location ▁has ▁the ▁cap ability ▁to ▁hold ▁a ▁population ▁of ▁J . ▁dich ot om us . ▁ ▁Tax onomy ▁▁ ▁. ▁ ▁J unc us ▁dich ot om us ▁is ▁considered ▁per enn ial ▁her bs ▁to ▁ 1 0 ▁d m . ▁Rh iz om es