Papers on Botany, Vol. 25 (Classic Reprint)

Excerpt from Papers on Botany, Vol. 25

People who think of the matter at all often think of the ferns as being a more conspicuous feature in the flora of the tropics than in that of temperate regions, but whether this is really true or not depends Это и многое другое вы найдете в книге Papers on Botany, Vol. 25 (Classic Reprint)