On some introduced plants of Australia and Tasmania.

A good deal of attention has been devoted to the introduced plants of Australia and Tasmania, and various lists of those introductions have been given in different colonial publications.<br>Dr. Hooker has added a rather extensive catalogue in his introduction to the Flora of Tasmania, and since then the subject has been dealt with by Baron von Mueller, Dr. Woolls, and Mr. F. M. Bailey. But while these essays have given complete lists, and thus serve as records for distinguishing hereafter what is indigenous to the country, and what is not, none have especially dealt with the peculiar and abundant spread of some plants in certain localities, and not in others.<br>This is what I propose to consider in the paper which I offer to the Society.