time to bone up

i just spent an hour trying to identify this tree. it stands somewhere on the stanford university campus and my daughter sent the image to me. it looks like an ash, and maybe like a mountain ash, but those last two leaves on the end of each frond are opposite, and it has red berries which don’t seem to work for an ash tree like we know here in the twin cities, yet it’s clearly not a mountain ash. i have spent so many years getting to know the species east of the mississippi river. now i have a reason to visit the west coast for a few years, and learn about its flora. i guess that means it’s time to bone up on the western north american species of plants and trees. but yikes it feels like a lot of work.

(unidentified) lamp lit tree on stanford campus,palo alto, california