Referenz SPRUCE, Richard. NOTES OF A BOTANIST ON THE AMAZON & ANDES: BEING RECORDS OF TRAVEL ON THE AMAZON AND ITS TRIBUTARIES, THE TROMBETAS, RIO NEGRO, UAUPÉS, CASIQUIARI, PACIMONI, HUALLAGA, AND PASTASA; AS ALSO TO THE CATARACTS OF THE ORINOCO, ALONG THE EASTERN SIDE OF THE ANDES OF PERU AND ECUADOR, AND THE SHORES OF THE PACIFIC, DURING THE YEARS 1849-1864. Londres, Inglaterra; Nova York, Estados Unidos; Cambridge, Inglaterra: Macmillan Publishers, 1908.