Notes of a botanist on the Amazon and Andes. Being records of travel on the Amazon and its tributaries, the Trombetas, Río Negro, Uaupés, Casiquiari, Pacimoni, Huallaga, and Pastasa; as also to the Cataracts of the Orinoco, along the eastern side of the Andes of Perú and Ecuador, and the shores of the Pacific, during the years1849-1864