Crataegus fontanesiana
Encyclopedia
J.B. Phipps has shown 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
.
Crataegus calpodendron
Crataegus calpodendron is a species of hawthorn native to much of the eastern US and to Ontario, Canada. The common name late hawthorn refers to the flowering time, which is later than most North American hawthorns.-References and external links:...
". The name was mis-applied for much of the 19th and 20th centuries to some forms of C. crus-galli
Crataegus crus-galli
Crataegus crus-galli is a species of hawthorn known by the common names cockspur hawthorn and cockspur thorn. It is native to eastern North America from Ontario to Texas to Florida, and it is widely used in horticulture. This is a small tree growing up to about 10 meters tall and 8 meters wide,...
.