So, I went to Arizona recently, and because the Sonora desert is extremely similar to the Mojave (featured in New Vegas), I felt I had to take pictures of the consumable plant life that was featured in New Vegas. So without further ado...
"Prickly Pear Cactus Fruit"
"Honey Mesquite Pods"
"Nevada Agave Fruit"
"Barrel Cactus Fruit"
"Banana Yucca Fruit"
Here's a real life Banana Yucca plant with fruit on it - someone else took this picture, none of the plants I saw in Arizona had actual fruit on them at the time.
Anyhow that was lots of fun - who says video games can't make people interested in the real world? Without New Vegas, I probably would have had much less interest in going to the desert.