Ash (tree)

[JPablo]

Oxford bilingual gives me "fresno"
Cambridge gives "cedro"
These are two different trees... at least in my village.

Random House gives,
ash 1. any of various trees of the genus Fraxinus, of the olive family, esp. F. excelsior, of Europe and Asia, or F. americana (white ash), of North America, having opposite, pinnate leaves and purplish flowers in small clusters.

So, I'd think "fresno" (Fraxinus excelsior) is the correct translation, given that "cedro" (Cedrus libani) does not fit the taxonomy...

However, being an ignorant on the matter, I submit my question, hoping someone can shed some additional (fully qualified) light...