Crataegus crus-galli
Biancospino sperone di gallo

Si tratta di un arbusto o di un albero alto fino a 6 metri. Possiede rami con spine di 3 - 8 cm.  I fiori sono bianchi di odore sgradevole. I frutti arrotondati, di colore rosso cupo, di solito contengono 2 noccioli e spesso persistono sulla pianta fino a primavera. Habitat: boschetti aperti con suolo secco e roccioso.

Crataegus crus-galli
Cockspur hawthorn

Crataegus crus-galli is a species of hawthorn known by the common names cockspur hawthorn and cockspur thorn. It is native to eastern North America from Ontario to Texas to Florida, and it is widely used in horticulture. This is a small tree growing up to about 10 meters tall and 8 meters wide, rounded in form when young and spreading and flattening as it matures. The leaves are 5 to 6 centimeters long, glossy dark green in color and turning gold to red in the fall. The flowers are white and have a scent generally considered unpleasant. The fruits are small pomes that vary in colour, usually a shade of red. Most wild varieties of the tree are heavily armed in sharp thorns several centimeters long.