C. cerronis A.Nelson
Crataegus erythropoda is a hawthorn native to the southern Rocky Mountains in the U.S. The leaves are conspicuously shiny above and fruit ("haws") are dark purplish red. It is seldom cultivated, but at one time was listed in the nursery trade under the common name "Chocolate Haw". It is closely related to C. rivularis which has fruit that are fully black when ripe.
- Phipps, J.B., O’Kennon, R.J., Lance, R.W. (2003). Hawthorns and medlars. Royal Horticultural Society, Cambridge, U.K.
- Cockerell, T.D.A. (1907). The genus Crataegus in Colorado. University of Colorado Studies 5:41–45.
- Andrews, D.M. 1923. New and noteworthy plants. Rockmont Nursery, Boulder, CO.
- Phipps, J.B. (1999). The relationships of the American black-fruited hawthorns Crataegus erythropoda, C. rivularis, C. saligna and C. brachyacantha to C. ser. Douglasianae (Rosaceae). Sida Contributions to Botany. 18(3): 647–660.
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