Lucien Marcus Underwood,
The progress of our knowledge ofthe Flora of North America
(1907)
“ In fact, it was not the policy of Asa Gray to develop botanists; he was an ambitious man and he thought to hold the higher flora of North America in his own keeping; if any people attempted to do independent work, they were immediately criticized so roundly that only the bravest ever dared show his hand in print again. But there came a revolt. Asa Gray was, to use his own expression, ‘a closet botanist.’ After his early days in New York he rarely went afield even in the vicinity of his own home. He knew his plants only as they were found in the hortus siccus. ”
