A history of the aggregates, or cluster-headed plants: comprehending the entire genera ... and all the species of each, known to-this day. Their descriptions, characters, virtues, and uses; their place of growth, time of flowering, stature, duration, colours, and other peculiarities, and a figure of every plant, drawn and engraved from nature. With observations on a natural method, so far as it regards the connection of classes; on the production and propagation of mulish or intermediate plants and on certain plants which are common to England and America