J.B. Phipps has shown[1] that Crataegus fontanesiana are "somewhat narrow-leaved forms of C. calpodendron". The name was mis-applied for much of the 19th and 20th centuries to some forms of C. crus-galli.

References

  1. ^ Phipps, J.B. (1987). "What is Crataegus fontanesiana (Spach) Steud.? (Rosaceae)". Taxon. 36 (3): 641–4. doi:10.2307/1221862. JSTOR 1221862.