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pale wallflower

Habit Plants biennial.
Stems

0.5–3(6.5) dm.

Basal leaves

often withered by fruiting, linear-oblanceolate, 2–11(15) cm × (1.5)2–6 mm;

margins entire or very rarely denticulate.

Cauline leaves

margins upper entire, sessile.

Inflorescences

fruiting pedicels divaricate-ascending, 4–11(15) mm; narrower than fruits.

Flowers

sepals linear-oblong, 8–13 mm;

lateral pair saccate;

petals obovate to broadly so, 14–22(25) × 3–7.5 mm; bright or pale yellow;

claws 11–16 mm;

tips rounded;

median filaments 10–14 mm;

ovules 34–46 per ovary;

styles slender; (2)2.5–5 mm, sparsely pubescent;

stigmas entire.

Fruits

strongly latiseptate, not torulose, 3–12 cm × (2)2.4–3.7 mm;

valves with prominent midveins, pubescent outside with 2- and 3-rayed trichomes, glabrous inside.

Seeds

ovoid; (2)2.5–3.5 × 1.3–2.5 mm, 0.3–0.8 mm wide at distal end, winged.

Trichomes

2–3-rayed.

2n

=36.

Erysimum occidentale

Erysimum franciscanum

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

Sand deposits. Flowering Mar–Jul. 0–900 m. Col. ID, WA. Native.

The species is confined to sand deposits along or near the Columbia River and its tributaries.

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