9a. Chylismia scapoidea subsp. scapoidea
[E F]
Chylismia scapoidea var. seorsa A. Nelson; Oenothera scapoidea Torrey & A. Gray var. seorsa (A. Nelson) Munz
Leaves: blade usually unlobed, rarely pinnately lobed with few, small lateral lobes, terminal lobe narrowly ovate to ovate or, sometimes, elliptic, 1–5.5 × 0.5–3 cm, margins subentire, oil cells on abaxial surface inconspicuous, usually pale yellowish brown, rarely darker. Flowers: petals 1.7–5 mm. Capsules (10–)15–30 mm. 2n = 14, 28.
Flowering Mar–May. Sandy or clay flats; 1200–2000(–2500) m; Ariz., Colo., Nev., N.Mex., Oreg., Utah, Wyo.
Subspecies scapoidea is known from western Wyoming, west to Lake County, Oregon, and Elko and White Pine counties, Nevada, south to Beaver County, Utah, northern Coconino, Navajo, and Apache counties, Arizona, Sandoval and San Juan counties, New Mexico, and western Colorado; also on the headwaters of the Arkansas River in eastern Colorado (Fremont and Pueblo counties). It is the only member of sect. Chylismia that occurs east of the Continental Divide.
