Answer: The genus and species for this hawthorn is Crataegus crus-galli and the variety name is 'Crusader' or sometimes 'Cruzam.' I found references to the genus and species in quite a few books, but none mentioned this particular variety. However, here is a website from a wholesale nursery that contains information: http://220.127.116.11/RefRoom/Reference.asp?plant_id=144&plant_... Since it's characteristics will be similar to the species (C. crus-galli), you can use information from that tree for guidelines, also. It is commonly called cockspur hawthorn.
I hope this helps!
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