[ECOLOG-L] Occurrence records (long, lat) of tree species

I am a high school student doing research on the distribution of trees of North America. I am looking for occurrence records (points with longitude and latitude) of as many tree species as possible. I have already downloaded such records from GBIF. What are other sources to get occurrence

[ECOLOG-L] Distribution data for trees of North America

Hello, I am a high school student doing research on the distribution of trees of North America. I need occurrence records of as many tree species as possible. I have already downloaded data from GBIF. What are other sources top get occurrence records from? Thanks!