Impatiens aurella Rydb.

Impatiens aurella Rydb. Bull. Torrey Club 28 : 34. 1901
Annual; stem slender, light-green, 5-6 dm. high, branched; petioles 1-3 cm. long; leaf-blades ovate or oval, thin, bright-green, a little paler beneath, 2-8 cm. long, 1-4 cm. wide, acute at both ends, coarsely dentate with obliquely triangular, finely mucronate teeth; inflorescence 3-5 cm. long, 2-4-flowered ; bracts minute, subulate, 2 mm. long ; lateral sepals ovate, abruptly acuminate, 4-5 mm. long ; posterior sepal orange, unspotted, conic, 10-15 mm. long, 6-7 mm. wide, gradually tapering into the abruptly recurved and Scurved cylindric spur, which is about 8 mm. long ; petals orange, unspotted ; anterior petal triangular-obovate, emarginate, 5 mm. long, 8 mm. wide ; the other petals resembling those of the preceding species but scarcely more than half as long; pod clavate, acute, 15 mm. long, 4 mm. thick.
Type locality : Priest River, Idaho.
Distribution : Wet places, in Montana, Idaho, eastern Washington, and British Columbia.