Description: English: Botanical illustration of both sides of a leaf from Annona crassivenia. Date: 17 June 1914. Source: Safford, William E. (1914). "Classification of the Genus Annona with Descriptions of New and Imperfectly Known Species". Contributions from the United States National Herbarium. 18: 1–68. Author: William Safford is the author of the article in which the illustration appears, the illustration is unsigned.
