Erysimum cheiri |
Erysimum hieraciifolium |
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Aegean wallflower, common wallflower, European wallflower, wallflower |
European wallflower, wormseed mustard |
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Habit | Biennials or subshrubs. | Biennials. |
Stems | erect, unbranched or branched distally, (woody at base when subshrubs), 1.5–8 dm. |
erect, often branched distally, (slightly ribbed), (1–)3–9(–11) dm. |
Basal leaves | (rosulate when biennial, often withered by fruiting), similar to cauline. |
(withered by fruiting; petiole 1–4 cm); blade elliptic-oblong or oblanceolate, (1–)2–6(–8) cm × (0.3–)5–10 mm, base cuneate, margins entire or obscurely denticulate, apex acute. |
Cauline leaves | petiolate; blade (obovate to oblanceolate, 4–22 cm × 3–12 mm, base cuneate to attenuate), margins entire to repand. |
sessile or subsessile; blade (linear or elliptic-linear), margins entire or obscurely denticulate. |
Racemes | considerably elongated in fruit. |
considerably elongated in fruit. |
Flowers | sepals oblong, 6–10 mm, lateral pair not or slightly saccate basally; petals orange, yellow, brown, red, purple, violet, or white, broadly obovate to suborbicular, 20–35x 5–10 mm, claw 7–12 mm, apex rounded; median filaments 7–9 mm; anthers linear, 2.5–3.5 mm. |
sepals oblong, 4–7 mm, lateral pair not saccate basally; petals yellow, obovate, (6–)7–9(–10) × 2–3 mm, claw 5–8 mm, apex rounded; median filaments 4–6 mm; anthers oblong, 1.5–2 mm. |
Fruiting pedicels | divaricate-ascending to ascending, slender, narrower than fruit, 7–13 mm. |
suberect or ascending, slender, narrower than fruit, (3–)4–8(–10) mm. |
Fruits | ascending, narrowly linear, straight, not torulose, 3–10 cm × 2–7 mm, latiseptate to terete, not striped; valves with prominent midvein, pubescent outside, trichomes 2-rayed, glabrous inside; ovules 32–44 per ovary; style cylindrical or subconical, slender, 0.5–4 mm, pubescent; stigma strongly 2-lobed, lobes much longer than wide. |
erect, (often appressed to rachis), linear, straight, somewhat torulose, (1–)1.5–2.5(–4) cm × 1–1.3 mm, 4-angled, not striped; valves with prominent midvein, pubescent outside, trichomes 3- or 4-rayed, fewer 2-rayed ones, usually glabrous inside, rarely sparsely pubescent; ovules 40–60 per ovary; style cylindrical, slender, 0.5–2 mm; stigma capitate, entire. |
Seeds | ovate, 2–4 × 1.5–3 mm; wing continuous or distal. |
oblong, 1–1.5 × 0.4–0.6 mm; not winged. |
Tri | -chomes of leaves 2-rayed, rarely mixed with fewer 3-rayed ones apically. |
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Trichomes | of leaves mostly 3- or 4-rayed, 2-rayed ones usually on stem and pedicel. |
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2n | = 12. |
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Erysimum cheiri |
Erysimum hieraciifolium |
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Phenology | Flowering Apr–Jul. | Flowering Jun–Sep. |
Habitat | Disturbed sites, lawns, abandoned gardens | Moist areas, disturbed sites, grasslands, roadsides, waste ground |
Elevation | 0-1500 m (0-4900 ft) | 50-300 m (200-1000 ft) |
Distribution |
CA; BC; QC; YT; Europe [Introduced in North America]
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MA; VT; WI; MB; NB; NS; ON; QC; SK; Eurasia [Introduced in North America] |
Discussion | Erysimum cheiri is a widely cultivated ornamental of European origin. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 7, p. 539. | FNA vol. 7, p. 540. |
Parent taxa | Brassicaceae > tribe Erysimeae > Erysimum | Brassicaceae > tribe Erysimeae > Erysimum |
Sibling taxa | ||
Synonyms | Cheiranthus cheiri | |
Name authority | (Linnaeus) Crantz: Cl. Crucif. Emend., 116. (1769) | Linnaeus: Cent. Pl. I, 18. (1755) |
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