crataegus crus-galli

from WordNet (r) 3.0 (2006)

Crataegus crus-galli
    n 1: eastern United States hawthorn with long straight thorns
         [syn: {cockspur thorn}, {cockspur hawthorn}, {Crataegus
         crus-galli}]

from The Collaborative International Dictionary of English v.0.48

Cockspur \Cock"spur\, n. (Bot.)
   A variety of {Crat[ae]gus}, or hawthorn ({Crat[ae]gus
   Crus-galli}), having long, straight thorns; -- called also
   {Cockspur thorn}.
   [1913 Webster]

grant@antiflux.org