Erysimum suffrutescens |
Erysimum teretifolium |
|
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island wallflower, suffrutescent wallflower |
Santa Cruz wallflower |
|
Habit | Perennials or subshrubs. | Biennials or perennials; (short-lived, caudex often woody). |
Stems | ascending, proximal branches terminating in sterile rosettes, (woody at base), 1.5–8.1 dm. |
erect, unbranched, (1.4–)2.5–8(–10) dm. |
Basal leaves | blade linear to linear-oblanceolate, 3.7–15 cm × 1.5–6(–7) mm, base attenuate, margins usually entire, rarely sparsely denticulate, apex acute. |
blade filiform to narrowly linear, 5–17 cm × 0.4–3 mm, (somewhat revolute, appearing terete), base attenuate, margins denticulate, apex subacuminate. |
Cauline leaves | (distal) sessile; blade similar to basal. |
sessile; blade margins entire or remotely denticulate. |
Racemes | considerably elongated in fruit. |
considerably elongated in fruit. |
Flowers | sepals oblong to linear-oblong, 6–11 mm, lateral pair saccate basally; petals yellow, obovate to suborbicular, (11–)14–20(–22) × (3–)4–11.5 mm, claw 8–13 mm, apex rounded; median filaments 7–11 mm; anthers linear, 2.5–4 mm. |
sepals oblong to linear-oblong, 7–11 mm, lateral pair saccate basally; petals orange-yellow to yellow, broadly obovate to suborbicular, 15–20(–25) × 5–10 mm, claw 6–13 mm, apex rounded; median filaments 7–14 mm; anthers linear, 2.3–3.5 mm. |
Fruiting pedicels | ascending, slender, narrower than fruit, (3–)5–10 mm. |
divaricate to ascending, slender, narrower than fruit, 5–14 mm. |
Fruits | ascending to spreading, narrowly linear, straight or only slightly curved inward, not torulose, (2–)3–8.4(–11) cm × 1.5–2.4(–3.5) mm, 4-angled to only slightly latiseptate, not striped; valves with prominent midvein, pubescent outside, trichomes 2–4-rayed, glabrous inside; ovules 48–82 per ovary; style cylindrical, stout, 0.5–4 mm, sparsely pubescent; stigma slightly 2-lobed, lobes as long as wide. |
widely spreading to ascending, narrowly linear, curved or slightly twisted, somewhat torulose, (4–)7–12(–15) cm × 1.2–2.2(–2.5) mm, slightly latiseptate, not striped; valves with prominent midvein, pubescent outside, trichomes 2 and 3 (or 4)-rayed, glabrous inside; ovules 40–72 per ovary; style cylindrical, slender, 0.5–2(–2.5) mm, sparsely pubescent; stigma subentire to slightly 2-lobed, lobes as long as wide. |
Seeds | oblong, 1.5–2.5(–3) × (0.7–)1–1.2(–1.4) mm; not winged or winged apically. |
ovoid, 1.5–2.3(–2.7) × 0.9–1.5 mm; wing appendage-like, distal. |
Trichomes | of leaves 2-rayed, sometimes mixed with 3- or 4-rayed ones. |
of leaves 2-rayed, mixed with 3-rayed ones. |
2n | = 36. |
= 36. |
Erysimum suffrutescens |
Erysimum teretifolium |
|
Phenology | Flowering Dec–Aug. | Flowering Feb–May. |
Habitat | Stabilized coastal sand dunes, coastal scrub vegetation | Sandy areas bordering sage scrub or chaparral, sand deposits derived from sandstone |
Elevation | 0-150 m (0-500 ft) | 100-400 m (300-1300 ft) |
Distribution |
CA
|
CA |
Discussion | Erysimum suffrutescens is restricted to the coastal regions of Los Angeles County northward into San Luis Obispo, Santa Barbara, and Ventura counties. Both G. B. Rossbach (1958, 1958b) and R. C. Rollins (1993) treated it as a distinct species, but R. A. Price (1993) transferred it (invalidly) to a subspecies of E. insulare. The latter species has angustiseptate (versus 4-angled to slightly latiseptate) fruits, and the two are sufficiently distinct to be recognized as independent species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Erysimum teretifolium is a highly endangered species known only from Santa Cruz County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 544. | FNA vol. 7, p. 545. |
Parent taxa | Brassicaceae > tribe Erysimeae > Erysimum | Brassicaceae > tribe Erysimeae > Erysimum |
Sibling taxa | ||
Synonyms | Cheiranthus suffrutescens, E. concinnum subsp. suffrutescens, E. suffrutescens var. grandifolium | E. filifolium |
Name authority | (Abrams) Rossbach: Aliso 4: 121. (1958) | Eastwood: Leafl. W. Bot. 2: 144. (1938) |
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