Lincoln officials don't want to see any new Quaking Aspen trees planted along the city's streets, but nearly 50 other trees were added to the approved list for street-side use.
The city recently updated its approved list of trees for use in the public right of way between sidewalks and streets.
The city requires developers to plant trees in that strip of land to create tree-lined streets.
But Parks Director Lynn Johnson says the city wants a wide variety of trees to be planted, so Lincoln can better withstand an insect or disease infestation that attacks a particular tree.
In the 1970s, Dutch elm disease killed more than one-third of Lincoln's street trees.