olia , ▁and ▁C ▁Si ber ia , ▁the ▁A cor us ▁amer ican us ▁dip lo id ▁stra in ▁does ▁not ▁contain ▁the ▁pro car cin ogen ic ▁ β - as ar one . ▁Research ▁has ▁consist ently ▁demonstrated ▁ ▁that ▁" β - as ar one ▁was ▁not ▁detect able ▁in ▁the ▁North ▁American ▁sp ont aneous ▁dip lo id ▁A cor us ▁[ Cal am us ▁var . ▁American us ] ". ▁ ▁It ▁is ▁believed ▁by ▁some ▁that ▁cal am us ▁is ▁a ▁hall uc in ogen . ▁This ▁urban ▁legend ▁is ▁based ▁on ▁two ▁pages ▁of ▁a ▁book ▁written ▁by ▁Hof fer ▁and ▁O sm und ▁entitled ▁The ▁Hall uc in og ens . ▁ ▁The ▁information ▁on ▁these ▁two ▁pages ▁came ▁from ▁an ec dot al ▁reports ▁from ▁two ▁individuals ▁( a ▁husband ▁and ▁wife ) ▁who ▁reported ▁that ▁they ▁had ▁ing ested ▁cal am us ▁on ▁a ▁few ▁occasions . ▁None ▁of ▁the ▁components ▁in ▁cal am us ▁are ▁converted ▁to ▁T MA ▁( trim eth ox y am ph et am ine ) ▁in ▁the ▁human ▁organ ism . ▁To ▁date ▁there ▁is ▁no ▁solid ▁evidence ▁of ▁any ▁hall uc in ogen ic ▁subst ances ▁in ▁A cor us ▁cal am us . ▁▁ ▁However , ▁for ▁Native ▁Americans , ▁specifically ▁the ▁Al berta ▁C ree , ▁" the ▁root ▁{ was } ▁che wed ▁for ▁the ▁hall uc in ogen ic ▁effects ," ▁so ▁perhaps ▁more ▁investigation ▁is ▁needed . ▁ ▁Cal am