cockspur thorn
noun
1- a North American hawthorn which is widely planted for its rich orange autumn foliage火棘叶鸡距山楂。
1.1
- Crataegus crus-galli, family Rosaceae.拉丁名Crataegus crus-galli,蔷薇科。
1.2
- any of a number of trees bearing long spiny thorns长有长棘的树。