It’s true that both can be confusing especially with names already somewhat the same. Here’s a link that’s well done to help identify the difference between hawthorn and blackthorn.
Would be happy to hear a feedback, if this is helpful to you.
The Blackthorn fruit tree produces surprising fruits, sloes, that are always best when they've burst just after the first frost spells. Blackthorn basic facts Name – Prunus spinosa Family – Rosaceae Type – shrub Height – 3 to 16 feet (1 to 5 m) Growth rate –…
Devil’s walking stick is an interesting shrub both for its summer blooming and for its large pointy leaves. Devil's walking stick facts Name – Aralia spinosa Family – Araliaceae Type – shrub Height – 16 to 25 feet (3 to 8 meters) Exposure – full sun Soil – ordinary Foliage – deciduous Flowering –…