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Habit Perennials; (base sometimes woody); (glaucous), pubescent or glabrous.
Stems

erect to ascending, usually unbranched, rarely branched (few) proximally, 1.5–4.5 dm, (sparsely pubescent).

Basal leaves

(withered by flowering), similar to cauline.

Cauline leaves

petiole 1.5–3 cm;

blade (fleshy), lanceolate to ovate in outline, 4–7.5(–9.5) cm (smaller distally), margins (proximalmost) often 2-pinnatifid, or (distal) pinnatifid or pinnatisect, (surfaces sparsely pubescent, trichomes crisped).

Racemes

dense.

Flowers

sepals linear, 6.5–10 mm, glabrous;

petals yellow-orange, oblong or narrowly so, 5–12 × 0.8–2 mm, claw (nearly linear), 5–7 mm, distinctly wider at base, pubescent inside;

filaments 10–15 mm, glabrous;

anthers 3–4 mm;

gynophore 4–11 mm, sparsely to densely pubescent.

Fruiting pedicels

horizontal to divaricate-ascending, 5–10 mm, (sparsely pubescent).

Fruits

divaricate, tortuous, (torulose), terete, 2.5–4.6 cm × 1.5–2 mm;

ovules 24–34 per ovary;

style 0.02–0.4 mm.

Seeds

oblong, 2.2–2.6 × 0.9–1.2 mm.

2n

= 28.

Stanleya bipinnata

Phenology Flowering Jun–Jul.
Habitat Loose shale, clay hills, open plains, gumbo swales, dry draws
Elevation 1800-2400 m (5900-7900 ft)
Distribution
from FNA
CO; UT; WY
[BONAP county map]
Discussion

Stanleya bipinnata is known from Larimer County in Colorado, Uinta County in Utah, and Albany, Carbon, and Uinta counties in Wyoming. R. C. Rollins (1993) and R. W. Lichvar (1983) treated it as a variety of S. pinnata; the morphological differences between these taxa strongly support the recognition of two species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 7, p. 696.
Parent taxa Brassicaceae > tribe Thelypodieae > Stanleya
Sibling taxa
S. albescens, S. confertiflora, S. elata, S. pinnata, S. tomentosa, S. viridiflora
Synonyms S. pinnata var. bipinnata, S. pinnata var. gibberosa
Name authority Greene: Erythea 4: 173. (1896)
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