I photographed this plant years ago at the Dallas Botanical Garden. It was labeled... but the genus is no longer valid. It might have been absorbed into the genus Berberis... but I'm not sure.
Despite vicious thorns it was a very interesting, good-looking plant.
Name: Daisy I Reno, Nv (Zone 6b) Not all who wander are lost
Can you tell us what it was labeled then?
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost
President: Orchid Society of Northern Nevada
Looks like agarita to me. Highly desirable native plant with delicious berries. They're harvested by spreading a cloth under the bush and beating it with a stick. The fruit makes delicious jelly. But those leaf-points are sharp!