Flora of the Venezuelan Guayana is a multivolume flora describing the vascular plants of the Guayana Region of Venezuela, encompassing the three states south of the Orinoco: Amazonas, Bolívar, and Delta Amacuro. Initiated by Julian Alfred Steyermark in the early 1980s, it was completed after his death under the guidance of , , and . The nine volumes were published between 1995 and 2005 by Timber Press and Missouri Botanical Garden Press. The project brought together more than 200 botanists from around the world and was "the first effort to produce a comprehensive inventory and identification guide for the plants of such an extensive region of northern South America".