to michaux, and a much lesser extent saunier, is attributed the first introduction of trees and shrubs from eastern north america. to saunier in particular is attributed the introduction to cultivation of the chinquapin, "castanea pumila", and bean tree "catalpa bignonioides" although william jackson bean in his "trees and shrubs hardy in the british isles" refers to its introduction to cultivation, at least in the british isles, in 1729. in volume one of the same work bean notes that, at that time of his writing, some of the trees raised from the seed of michaux's collections in america could still be seen in the gardens of petit trianon and arboretum de balaine.