I live in the desert in California. Have a ton of weeds in our yard and saw this bush with some berries growing on it. Can anyone tell me what it is?
Looks like it might be a member of the Nightshade family.
Yes, I agree, it looks like a Solanum - maybe Lycianthes rantonnei. They are not all poisonous - we eat potatoes and tomatoes but I have found Lycianthes rantonnei on a poisonous plant database.
It's always best to assume things from Solanaceae are toxic--although we can eat some parts of some of them, they all have at least some poisonous parts and quite a lot of them don't have any parts that we can eat. So definitely a genus where it's best to play "better safe than sorry"
If it's something that popped up on its own, it is likely one of the Solanum species that occurs in San Bernadino county: http://www.calflora.org/cgi-bin/specieslist.cgi?where-prettyreglist=San%20Bernardino&where-namesoup=solanum&where-caltranslifeform2=any&where-native=any&rel-rarity=invalue&where-rarity=any&rel-calipc=gte&rel-upper_elev_ft=gt&where-upper_elev_ft=&rel-lower_elev_ft=lt&where-lower_elev_ft=&where-category=any&where-pretty_plantcomm=any&orderby=taxon Of the species that occur in San Bernadino county, my money would be on Solanum nigrum (which apparently is now known as S. ptycanthum) http://davesgarden.com/guides/pf/go/54503/