Finely Done Antique Flower Specimen Watercolor: Violets

This is one of several finely executed watercolors of floral specimens I am listing by a May Elizabeth Green, and I must say when I first saw this one I thought for a moment that it was an actual pressed violet from an herbarium. Really delicately done, as it was meant to be, documenting two different varieties of violets and their leaves.

8" x 5 1/8" and in excellent condition. Late 19th century I believe.