Vere Foster's simple lessons in water-color, flowers : eight facsimiles of original water-color drawings and numerous outline drawings of flowers, after various artists, with full instructions for drawing and painting (1884)
Foster, Vere, 1819-1900 · London : Blackie & Son · leaf 56
ht Emerald Green. The brighter greens, such as are seen on the veins of the large leaf and on parts of the stalks, are composed of a mixture of Gamboge and Prussian Blue. The bluish-grey tints are given by a mix- ture of French Blue and Naples Yellow in varying proportions. If these colors seem… … (Japanese) Ornamental Treatment of the Primrose.— (From South Kensington Drawing-Book.)
Watercolor painting
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.