/ Aquarelles pomologiques
Steadman, Royal Charles. Malus domestica, var. Jonathan, Saint Clair County, Michigan. Aquarelle, 17 x 25 cm. 1918.
Steadman, Royal Charles. Vitis, var. Lamanto. Aquarelle, 22 x 27 cm. C. 1920.
U.S. Department of Agriculture Pomological Watercolor Collection.
Wikipedia: Royal Charles Steadman (1875-1964).