"Glossopteris" leaves are morphologically simple so there are few characters that can be used to differentiate species. Consequently, many past researchers have considered the Permian "Glossopteris" flora to be rather homogeneous with the same species distributed throughout the Southern Hemisphere. However, more recent studies of the more morphologically diverse fertile organs have shown that taxa had more restricted regional distributions and several intra-gondwanan floristic provinces are recognizable. Seeds, much too large to be wind-borne, could not have blown across thousands of miles of open sea, nor is it likely they have floated across vast oceans. Observations such as these led the Austrian geologist Eduard Suess to deduce that there had once been a land bridge between these areas. He named this large land mass Gondwanaland (named after the district in India where the plant "Glossopteris" was found). These same observations would also lend support to Alfred Wegener's Continental drift theory.