Erysimum occidentale |
Erysimum franciscanum |
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pale wallflower |
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Habit | Plants biennial. | |
Stems | 0.5–3(6.5) dm. |
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Basal leaves | often withered by fruiting, linear-oblanceolate, 2–11(15) cm × (1.5)2–6 mm; margins entire or very rarely denticulate. |
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Cauline leaves | margins upper entire, sessile. |
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Inflorescences | fruiting pedicels divaricate-ascending, 4–11(15) mm; narrower than fruits. |
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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. |
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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. |
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Seeds | ovoid; (2)2.5–3.5 × 1.3–2.5 mm, 0.3–0.8 mm wide at distal end, winged. |
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Trichomes | 2–3-rayed. |
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2n | =36. |
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Erysimum occidentale |
Erysimum franciscanum |
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Distribution | ||
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. |
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Source | Flora of Oregon, volume 2, page 486 Ihsan Al-Shehbaz |
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Sibling taxa | ||
Web links |