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The article presents a study about the vegetation of Tristan Da Cunha located on the Central Atlantic Ridge. This paper focuses on the collections of plants from the islands studied by botanists with interest in phytogeographical problems. Topographical description of the area makes a suitable location for the study of present vegetation where past investigations tended to omit significant parts and areas because of difficulty to reach the nearly perfect volcanic cone of the region. Vegetation types were recognized in the four main topographical units.

The article discusses the phytogeography of the state of Tasmania. Tasmania is a small island about 27,000 square miles in the South East of the Australian continent. The northern coast is about 184 miles from that of Victoria and an elevation of only 180 feet would suffice for broad bridges on which one could pass dryfoot from Tasmania to the Australian mainland. The north and north- east portion of the island is less protected from the prevailing west winds of the Antarctic region by the West Coast mountains and the Central Plateau resulting in a lesser rainfall. The highest altitude in Tasmania is limited to 5000 restricted to a few masses of rock, vestiges of a former uniformly level area. There are no glaciers or permanent snow, therefore alpine conditions do not prevail.