Famous quotes containing the words tree and/or species:
“Each has his own tree of ancestors, but at the top of all sits Probably Arboreal.”
—Robert Louis Stevenson (1850–1894)
“Genius detects through the fly, through the caterpillar, through the grub, through the egg, the constant individual; through countless individuals the fixed species; through many species the genus; through all genera the steadfast type; through all the kingdoms of organized life the eternal unity. Nature is a mutable cloud which is always and never the same.”
—Ralph Waldo Emerson (1803–1882)