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repand wallflower, spreading wallflower

Habit Plants annual.
Stems

(0.4)1.5–4.5(7) dm.

Basal leaves

often withered by fruiting; middle cauline leaves linear, narrowly oblanceolate, elliptic, or oblong; (1)2–8(11) cm × (2)5–12(17) mm;

margins sinuate, dentate, or repand, petiolate.

Cauline leaves

upper entire or denticulate, sessile.

Inflorescences

fruiting pedicels divaricate; stout, 2–4(6) mm; width ? fruit.

Flowers

sepals oblong, 4–6 mm;

lateral pair not saccate;

petals oblanceolate to spatulate, 6–8 × 1.5–2 mm, yellow;

claws 3–6 mm;

petal tips rounded;

median filaments 4–6 mm;

ovules (40)50–80(90) per ovary;

styles stout, 1–4 mm, sparsely pubescent;

stigmas slightly 2-lobed.

Fruits

4-angled; somewhat torulose; (2)3–8(10) cm × 1.5–2 mm;

valves with distinct midveins, pubescent outside with 2(3)-rayed trichomes, glabrous or rarely sparsely pubescent inside.

Seeds

oblong, 1.1–1.5 × 0.6–0.7 mm; wingless or rarely distally winged.

Trichomes

2(3)-rayed.

2n

=16.

Erysimum repandum

Erysimum pallasii

Distribution
[WildflowerSearch map]
[BONAP county map]
[BONAP county map]
Discussion

Roadsides, disturbed areas, pastures, fields, barren hillsides. Flowering Apr–Jun. 0–2600 m. BR, BW, Casc, Col, ECas, Lava, Owy, Sisk, WV. CA, ID, NV, WA; scattered throughout southern Canada and US; Africa, Asia, Europe. Exotic.

Source Flora of Oregon, volume 2, page 486
Ihsan Al-Shehbaz
Sibling taxa
E. arenicola, E. capitatum, E. cheiranthoides, E. concinnum, E. inconspicuum, E. occidentale, E. perenne
E. arenicola, E. capitatum, E. cheiranthoides, E. concinnum, E. inconspicuum, E. occidentale, E. perenne, E. repandum
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