Mountain violets (Viola purpurea) are common on dry slopes and in forest openings throughout Tahoe at mid elevation . The shown plants were found at relatively high elevation along the Tahoe Rim Trail (TRT) between Relay Peak and the Slab Cliffs, in the Carson Range northeast of Lake Tahoe in northwest Nevada.
The small plants bear green, round-to-oval leaves that are deeply veined. Leaf veins and stems give the plant appearance a purplish tint. Also, the yellow flowers display brown-to-purple veins—mostly on their lower petal (top picture). The two upper petals show brown-purple splotches on their backside, seen in the picture below and in the picture above, in which the curled petals of the left flower reveal the darker underside coloration. The Latin word for purple is purpura, explaining the scientific species name.
Keywords: wildflowers, violet family (Violaceae), Carson Range, Reno-Tahoe.
References and more to explore
 Laird R. Blackwell: Tahoe Wildflowers • A Month-by-Month Guide to Wildflowers in the Tahoe Basin and Surrounding Areas. A Falcon Guide, Morris Book Publishing, LLC, 2007; page 54.
 Russ Cary: Yosemite National Park • Mountain Violet (Viola purpurea) [www.yosemitehikes.com/wildflowers/mountain-violet/mountain-violet.htm].