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pale wallflower, western wallflower

coast wallflower, curly wallflower, headland wallflower, Pacific wallflower

Habit Biennials. Biennials or perennials; (short-lived).
Stems

erect, often branched distally, 0.5–3(–6.5) dm.

erect, unbranched or branched distally, 0.4–5(–7) dm.

Basal leaves

(often withered by fruiting);

blade linear-oblanceolate, 2–11(–15) cm × (1.5–)2–6 mm, margins usually entire, rarely denticulate.

blade (slightly fleshy), spatulate to oblanceolate, 2–11 cm × 4–20 mm, base attenuate, margins sinuate-dentate to coarsely dentate, apex rounded to subacute.

Cauline leaves

(distal) sessile;

blade margins entire.

(distal) sessile;

blade margins entire or denticulate.

Racemes

(simple or branched), considerably elongated in fruit.

considerably elongated in fruit.

Flowers

sepals linear-oblong, 8–13 mm, lateral pair saccate basally;

petals bright or pale yellow, obovate to broadly so, 14–22(–25) × 3–7.5 mm, claw 11–16 mm, apex rounded;

median filaments 10–14 mm;

anthers linear, 3–4 mm.

sepals oblong, 8–19 mm, lateral pair saccate basally;

petals yellow to cream, suborbicular to broadly obovate, 15–32 × 6–16 mm, claw 8–12 mm, apex rounded;

median filaments 8–11 mm;

anthers linear, 3–4 mm.

Fruiting pedicels

divaricate-ascending, slender, narrower than fruit, 4–11(–15) mm.

ascending, stout, narrower than fruit, 2–4(–6) mm.

Fruits

ascending, narrowly linear, straight, not torulose, 3–12 cm × (2–)2.4–3.7 mm, strongly latiseptate, not striped;

valves with prominent midvein, pubescent outside, trichomes 2- and 3-rayed, glabrous inside;

ovules 34–46 per ovary;

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

stigma entire.

usually ascending to suberect, rarely divaricate-ascending, narrowly linear, straight or curved inwards, not torulose, (3–)5–13 cm × 2.2–5 mm, terete when immature, becoming strongly latiseptate, not striped;

valves with obscure midvein, pubescent outside, trichomes 2–5-rayed, glabrous inside;

ovules 42–68 per ovary;

style cylindrical or flattened, stout, 0.5–2.5 mm, sparsely pubescent;

stigma 2-lobed, lobes as long as wide.

Seeds

ovoid, (2–)2.5–3.5 × 1.3–2.5 mm;

wing continuous distally, (0.3–0.8 mm wide).

broadly ovate to suborbicular, (1.5–)2–4 × 1.5–3 mm;

wing continuous.

Trichomes

of leaves 2- or 3-rayed.

of leaves 2- or 3(–7)-rayed.

2n

= 36.

= 36.

Erysimum occidentale

Erysimum concinnum

Phenology Flowering Apr–Jun. Flowering Mar–Jun.
Habitat Sand deposits Coastal bluffs, dunes, prairies
Elevation 50-700 m (200-2300 ft) 0-400 m (0-1300 ft)
Distribution
from FNA
OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
Discussion

Erysimum occidentale is restricted to sand deposits along or near the Columbia River and its tributaries. It is distributed in Gilliam, Hood River, Morrow, Sherman, and Umatilla counties in Oregon, and in Franklin, Grant, Kittitas, Klickitat, Lincoln, Walla Walla, and Yakima counties in Washington.

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

Erysimum concinnum is a coastal species known from Curry County in Oregon, and from Del Norte, Humboldt, Marin, Mendocino, and Sonoma counties in California. Both G. B. Rossbach (1958) and R. C. Rollins (1993) treated it as a distinct species, but R. A. Price (1993) reduced it (invalidly) to a subspecies of E. menziesii.

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

Source FNA vol. 7, p. 543. FNA vol. 7, p. 540.
Parent taxa Brassicaceae > tribe Erysimeae > Erysimum Brassicaceae > tribe Erysimeae > Erysimum
Sibling taxa
E. ammophilum, E. arenicola, E. asperum, E. capitatum, E. cheiranthoides, E. cheiri, E. coarctatum, E. concinnum, E. franciscanum, E. hieraciifolium, E. inconspicuum, E. insulare, E. menziesii, E. pallasii, E. perenne, E. repandum, E. suffrutescens, E. teretifolium
E. ammophilum, E. arenicola, E. asperum, E. capitatum, E. cheiranthoides, E. cheiri, E. coarctatum, E. franciscanum, E. hieraciifolium, E. inconspicuum, E. insulare, E. menziesii, E. occidentale, E. pallasii, E. perenne, E. repandum, E. suffrutescens, E. teretifolium
Synonyms Cheiranthus occidentalis, Cheirinia occidentalis
Name authority (S. Watson) B. L. Robinson: in A. Gray et al., Syn. Fl. N. Amer. 1(1,1): 144. (1895) Eastwood: Zoë 5: 103. (1901)
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