1
A member of the Crataegus genus, hawthorn has a long history of medicinal use.
2
This potential hazard led us to investigate the suitability to leaf-curling aphids of alternative Crataegus species.
3
Ten Crataegus species characterized by their very low susceptibility to fire blight were examined from two angles.
4
They are allied to cratægus.
5
The possible causes of these negative results with respect to the geographical origin of the particular Crataegus species involved in this work are discussed.
6
In North America the numerous thorny species of Crataegus are equally vigorous, as are the false acacia (Robinia) and the honey-locust (Gleditschia).