V European origin Prunus domestica sp. A green, grape-sized plum with very juicy, sugar sweet yellow flesh. B Hildreth E-V Imperial Gage X Unknown Early Sept. Developed by Dr. Hildreth at Cheyenne Wyoming Expt. Station in the early 1900's.
Fruit is small, but of excellent quality.
Notable annual and prolific bearer. B Mt. Royal V Prunus domestica sp. Early Sept. Blue prune-type plum. Good for fresh eating, with firm, sweet, yellow-green flesh. Mt. Royal open pollinated Early Sept.