arugola rucolaI never heard arugola excepting that from our US students.
It looks like a mispelling originated from the article LA
So LA RUCOLA became L'ARUGOLA. But the real italian used name is rucola.
Same thing seems to happen to AMATRICIANA but the other way around.
PASTA ALL'AMATRICIANA is becoming PASTA ALLA MATRICIANA and that might become the new name.
When I go to the States I am amazed to see how many different names are given to italian names.
Here a little list
MARINARA is not used for tomato sauce (maybe some small area)
PEPPERONI (better PEPERONI) is not a spicy salami but BELL PEPPER
BRUSCETTA is BRUSCHETTA with a hard C.