This is Trillium stenosepalum, the Rocky Mountain trillium, recently elevated to species status. Waiting for the name to become available in iNat. See https://doi.org/10.3120/0024-9637-70.3.158
Texas Barberry, scientifically known as Berberis swaseyi, is a species of flowering shrub native to the Edwards Plateau region of Texas, USA. Also referred to as "Texas Mahonia," this plant is characterized by its dense growth habit, spiny branches, and attractive foliage. Texas Barberry typically grows to a height of 3 to 6 feet, forming dense thickets in rocky or limestone soils. The shrub's leaves are leathery and dark green, with a glossy appearance, and turn shades of red, orange, or purple in the fall, adding seasonal interest to the landscape. In the spring, Texas Barberry produces clusters of small yellow flowers, which give way to blue-black berries in the summer months. These berries are attractive to birds and other wildlife, making Texas Barberry a valuable plant for wildlife habitat and conservation efforts. Despite its thorny nature, Texas Barberry is sometimes used in landscaping as a barrier or hedge plant, providing both ornamental value and ecological benefits in gardens and natural areas.