Abstract Five species of Pedicularis were examined for evidence of alkaloid transfer from host plants. Pedicularis groenlandica and P. bracteosa were found to take up the pyrrolizidine alkaloid senecionine from the host Senecio triangularis. Pedicularis crenulata contained anagyrine from its host Thermopsis montana and P. grayi contained N-methylcytisine from its Thermopsis divaricarpa host. Pedicularis racemosa contained quinolizidines from a Lupinus argenteus hybrid. In addition, P. bracteosa was found to contain pinidinol, taken up from the host Picea engelmannii.