Erysimum occidentale |
Erysimum franciscanum |
|
---|---|---|
pale wallflower, western wallflower |
Franciscan wallflower, San Francisco wallflower |
|
Habit | Biennials. | Perennials or subshrubs. |
Stems | erect, often branched distally, 0.5–3(–6.5) dm. |
erect, often branched distally, (woody at base), 0.6–5(–6) dm. |
Basal leaves | (often withered by fruiting); blade linear-oblanceolate, 2–11(–15) cm × (1.5–)2–6 mm, margins usually entire, rarely denticulate. |
(often withered in suffrutescent plants); blade oblanceolate to oblanceolate-linear, 2.5–17 cm × (2–)3–16(–20) mm, base attenuate, margins sinuate-dentate or dentate, apex acute. |
Cauline leaves | (distal) sessile; blade margins entire. |
(distal) petiolate; blade margins usually dentate, rarely 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 to linear-oblong, 8–12(–15) mm, lateral pair saccate basally; petals yellow to cream, obovate to suborbicular, 14–29 × 5–12(–15) mm, claw 9–17 mm, apex rounded; median filaments 9–15 mm; anthers linear, 2.5–4 mm. |
Fruiting pedicels | divaricate-ascending, slender, narrower than fruit, 4–11(–15) mm. |
divaricate to ascending, stout, narrower than fruit, 5–17(–22) 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, rarely spreading, narrowly linear, straight or curved upward, not or, rarely, slightly torulose, (3.8–)4–11(–14) cm × 2–4 mm, latiseptate, not striped; valves with somewhat prominent midvein, pubescent outside, trichomes (2 or) 3 (or 4)-rayed, glabrous inside; ovules 32–64 per ovary; style cylindrical, slender, 0.5–3.5 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). |
oblong, 2–3.5(–4) × 1.2–2.2(–2.5) mm; wing distal, present on 1 or both margins. |
Trichomes | of leaves 2- or 3-rayed. |
of leaves 2-rayed mixed with 3(–5)-rayed ones. |
2n | = 36. |
= 36. |
Erysimum occidentale |
Erysimum franciscanum |
|
Phenology | Flowering Apr–Jun. | Flowering Jan–Apr. |
Habitat | Sand deposits | Serpentine outcrops, coastal scrub or sand dunes, granitic hillsides |
Elevation | 50-700 m (200-2300 ft) | 0-500 m (0-1600 ft) |
Distribution |
OR; WA
|
CA
|
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 franciscanum is known from Marin, San Francisco, San Mateo, and Santa Cruz counties. Historical records indicate that it grew previously in Sonoma County. (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 | ||
Synonyms | Cheiranthus occidentalis, Cheirinia occidentalis | E. franciscanum var. crassifolium |
Name authority | (S. Watson) B. L. Robinson: in A. Gray et al., Syn. Fl. N. Amer. 1(1,1): 144. (1895) | Rossbach: Aliso 4: 118. (1958) |
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