The Yellow-Flowered Iris (Iris chrysoplylla) stands less than eight inches tall and grows in forest openings and grassy meadows in Northern California and Western Oregon. The flowers are cream to pale yellow, with deeper yellow or lavender veins. The Evergreen Violet (Viola sempervirens) is a low-growing, evergreen perennial. Stems creep across ground producing mats of leathery, heart-shaped leaves with yellow flowers. It grows in moist forests throughout western North America.