▁of ▁Europe ▁and ▁Asia ▁is ▁a ▁ster ile ▁trip lo id ▁species , ▁that ▁only ▁spread s ▁a sex ually . ▁D ip lo id ▁plants ▁in ▁northern ▁Asia ▁may ▁be ▁represent atives ▁of ▁A . ▁amer ican us . ▁Also ▁as ▁a ▁dip lo id ▁it ▁does ▁not ▁produce ▁b - as ar one . ▁ ▁Us es ▁ ▁This ▁plant ▁was ▁used ▁extens ively ▁by ▁Native ▁Americans ▁and ▁early ▁European ▁sett lers . ▁ ▁Chem istry ▁ ▁In ▁ 1 9 6 8 ▁the ▁Food ▁and ▁D rug ▁Administration ▁b anned ▁A cor us ▁cal am us ▁from ▁being ▁used ▁as ▁a ▁food ▁add itive ▁and ▁as ▁a ▁medic inal ▁as ▁a ▁result ▁of ▁lab ▁studies ▁that ▁involved ▁supp lement ing ▁the ▁di ets ▁of ▁lab ▁animals ▁over ▁a ▁prolong ed ▁period ▁of ▁time ▁with ▁ ▁massive ▁dos es ▁of ▁isolated ▁chemical s ▁( β - as ar one ) ▁from ▁the ▁Indian ▁Jam mu ▁stra in ▁of ▁A cor us ▁cal am us . ▁The ▁plant ▁was ▁l abeled ▁pro car cin ogen ic . ▁W icht l ▁says ▁" It ▁is ▁not ▁clear ▁whether ▁the ▁observed ▁car cin ogen ic ▁effects ▁in ▁r ats ▁are ▁relevant ▁to ▁the ▁human ▁organ ism ." ▁However , ▁most ▁sources ▁advise ▁ca ution ▁in ▁ing est ing ▁stra ins ▁other ▁than ▁the ▁dip lo id ▁stra in . ▁ ▁Like ▁the ▁dip lo id ▁stra ins ▁of ▁A cor us ▁cal am us ▁in ▁parts ▁of ▁the ▁H imal ay as , ▁Mong