 Ferdinand von Mueller had identified Bancroft's 1877 batch of pituri as the crushed leaves and twigs of the shrub, "Duboisia hopwoodii", and writers subsequently referred to "Duboisia hopwoodii" as the raw material of pituri.For instance, in his report on the 1891 Elder expedition into northwest South Australia and the Gibson, Great Sandy and Great Victoria deserts of Western Australia, Richard Helms noted, "Whilst these tribes have discovered the stimulating properties of "Nicotiana suaveolens" [a species of native tobacco], they do not seem to know the more powerful narcotic of 'pituri', "Duboisia hopwoodii", which also occurs in many places throughout the same regions.