William Trelease

"As our race has advanced in civilization, owing its progress to a more and more rigid division of labor, with the attendant and ever increasing specialization by which each piece of the great machine does its work more perfectly, yet more and more completely loses its direct touch with all but a few of the other parts, most men have lost much of what was at first common to all; and this, perhaps, quite as true as of a knowledge of plants as of anything else."

"The development of any department of science is closely connected with its power of interesting men."