5. Stanleya pinnata (Pursh) Britton, Trans. New York Acad. Sci. 8: 62. 1889.
Cleome pinnata Pursh, Fl. Amer. Sept. 2: 739. 1813
Perennials, subshrubs, or shrubs; (sometimes suffrutes-cent); (glaucous or not), mostly glabrous. Stems erect, unbranched or branched (few) proximally and distally, (1.2-) 3-12(-15.3) dm. Basal leaves (withered by flowering); similar to cauline. Cauline leaves: petiole 0.7-6.2 cm; blade (fleshy), oblanceolate to broadly lanceolate or ovate in outline, or (distally) lobed or linear to narrowly lanceolate, 3-15 cm (smaller distally), margins lyrate-pinnatifid or runcinate, or (distal) pinnately lobed or entire. Racemes somewhat dense. Fruiting pedicels horizontal to divaricate, 3-11 mm. Flowers: sepals oblong-linear, 8-16 mm; petals yellow, oblanceolate to oblong, 8-20 × 2-3 mm, claw 4-10 mm, wider at base, densely pubescent inside; filaments 11-28 mm, pilose at base; anthers 3-5 mm; gynophore 7-28 mm. Fruits usually spreading to divaricate, rarely ascending, often strongly curved downward, not tortuous, (smooth), terete, 3-9 cm × 1.5-3 mm; ovules 10-38 per ovary; style 0.2-0.6 mm. Seeds (sometimes black), oblong, 2.5-4.5 × 1.2-2 mm.
Varieties 3 (3 in the flora): w, c United States.
SELECTED REFERENCE Lichvar, R. W. 1983. Evaluation of varieties in Stanleya pinnata (Cruciferae). Great Basin Naturalist 43: 684-686.
