Definitions
1.NounCrataegus monogyna, a hawthorn species native to Europe, northwest Africa and western Asia.
2.NounBursaria spinosa, a small Australian shrub.
3.NounVachellia constricta, formerly Acacia constricta, whitethorn acacia, a shrub in the family Fabaceae.
4.NounSenegalia polyacantha, of India
5.NounCeanothus leucodermis, chaparral whitethorn, a shrub in the family Rhamnaceae.