Silver Buffalo Berry (see reference) - silver refers to the color of the leaves of the plant, photo taken at I90 rest area at Sundance, Wyoming.
higher resolution image - 524kb
August 26, 2007, 12:19 P.M. - Pentax K10D: ISO 100, 55mm focal length (82mm in 35mm format), 1/125 second exposure, F 8.0

from 
August 28th, 2007 at 9:14 pm
Those are beautiful. Wonder if people can eat them. The leaves are very different.
August 30th, 2007 at 7:54 am
Yes, they are edible. They can be ordered for planting online from Spring Valley Roses and probably some other websites as well.