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FNA | Family List | FNA Vol. 7 | Brassicaceae | Stanleya

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.

1 Cauline leaf blades: margins (at least proximal ones) lyrate-pinnatifid to runcinate.   5a Stanleya pinnata var. pinnata
+ Cauline leaf blades: margins usually entire, rarely proximalmost dentate   (2)
2 (1) Cauline leaf blades ovate to lanceolate; petals 11-16 mm, claws 6-9 mm; ovules 26-34 per ovary; gynophores pubescent basally; Colorado, Kansas, Nevada, Utah, Wyoming.   5b Stanleya pinnata var. integrifolia
+ Cauline leaf blades linear-lanceolate; petals 8-9(-10) mm, claws 4-5 mm; ovules 10-20 per ovary; gynophores glabrous or nearly so; Texas.   5c Stanleya pinnata var. texana

Lower Taxa


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