There seem to be two types of blackberry growing around here. The first to ripen has fewer clusters of larger berries. The other is the more familiar type with more plentiful fruit, with tighter clusters of berries.

The blackberries within the city also seem to be ripening earlier than the ones out in the countryside. The latter type are already ripe in the nearby park but are still mostly green further afield.

On the left, the more common later ripening fruit with smaller berries. On the right, the less common version with larger berries.