"By a botanist I mean one who understands how to observe the genera of Nature. I judge unworthy of the name of botanist the meddlesome person who is indifferent to genera."

"Man is the measure of all things, and the animals exist for his sake."

"A world without names is a world without knowledge."

"The number of species is fixed and unchanging."

"The calyx is the marriage bed, the corolla the bed-curtains, the filaments the spermatic vessels, the anthers the testes, the pollen the semen, the pistil the vagina, the ovary the uterus, the ovules …"