The USDA Pomological Watercolor Collection is one of the most unique collections in the National Agricultural Library (NAL). As a historic botanical resource, it documents new fruit and nut varieties and specimens introduced by USDA plant explorers from the late 19th and early 20th centuries. The collection spans the years 1886 to 1942, with the majority of the paintings created between 1894 and 1916. The plant specimens represented by these artworks originated in 29 countries and 51 states and territories in the US; there are 7,497 watercolour paintings, 87 line drawings and 79 wax models created by approximately 21 artists.
source: https://naldc.nal.usda.gov/usda_pomological_watercolor
