This is Berberis fendleri, also known as Colorado barberry. Growing up to 8 feet tall Berberis fendleri likes to live in full sun to partial shade. The fruits from Colorado barberry can be eaten raw or cooked. From late Winter to the middle of Spring Berberis fendleri has yellow blossoms. Also, a yellow dye can be obtained from the roots of the Colorado barberry plant. USDA Hardiness Zones 5 to 9.