Tree genus question for tree in Las Vegas, Nevada?

Question

I took some pics, and it seems to me as some kind of fibrous willow, but not sure. What is it? I took some seed pods and cannot find them anywhere.

http://i36.tinypic.com/4qofuq.jpg

http://i36.tinypic.com/10x5vyg.jpg

http://i35.tinypic.com/23jn57a.jpg

Answer 1

My first guess is the Honey Locust Gleditsia triacanthos inermis looking at the rough bark and pods. The leaves are not in focus to allow an idea of their detail so I can't tell if they are compound or not.

http://www.hort.uconn.edu/plants/g/gletr...

http://www.oplin.org/tree/fact%20pages/h...

http://ag.arizona.edu/pima/gardening/ari...

Alternately it could be an Acacia, possibly the Shoestring (Acacia stenophylla) or, more likely, the Sweet Acacia (A. smallii). There is a willow leaved Acacia (A. salicina) that has simple leaves but not so long and narrow as the Shoestring  Acacia's.

http://www.aridzonetrees.com/AZT%20Inter...

http://www.cityofhenderson.com/parks/par...

http://ag.arizona.edu/pima/gardening/ari...

Both of these types of trees have the pods, leaves made up of paired leaflets  and are leguminous. Other related members of