Tuesday, June 12, 2007
Turning now from the animal to the vegetable kingdom it appears thatthe greater part of the flora of the Miocene age in Europe--foundchiefly in the fossil beds of Switzerland--exist at the present day inAmerica, some of them in Africa. But the noteworthy fact about Americais that while the greater proportion are to be found in the EasternStates, very many are wanting on the Pacific coast. This seems to showthat it was from the Atlantic side that they entered the continent.Professor Asa Gray says that out of 66 genera and 155 species found inthe forest east of the Rocky Mountains, only 31 genera and 78 speciesare found west of these heights.
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