with ___ smooth sharp thorns that are:
<2 cm (<¾ in), spaced=regular or
>2 cm (>¾ in), spaced=irregular :

Thorns >2 cm (>¾ in), spaced=irregular

thorns=some branched;  no winter buds
honey locust Gleditsia triacanthos

thorns=none branched;  buds show in winter
hawthorns genus Crataegus