The Collaborative International Dictionary
Crataegus cordata
Hawthorn \Haw"thorn`\ (h[add]"th[^o]rn`), n. [AS. haga[thorn]orn, h[ae]g[thorn]orn. See Haw a hedge, and Thorn.] (Bot.) A thorny shrub or tree (the Crat[ae]gus oxyacantha), having deeply lobed, shining leaves, small, roselike, fragrant flowers, and a fruit called haw. It is much used in Europe for hedges, and for standards in gardens. The American hawthorn is Crat[ae]gus cordata, which has the leaves but little lobed.
Gives not the hawthorn bush a sweeter shade
To shepherds?
--Shak.