Sisymbrium erysimoides


Fl. Atlant. 2: 84. 1798.

Treatment appears in FNA Volume 7. Treatment on page 669. Mentioned on page 668, 670.

Annuals; glabrous or pubescent. Stems erect, unbranched or branched distally, (1–)2–6(–8) dm, glabrous or sparsely pilose at least basally, usually glabrous distally. Basal leaves (soon withered); not rosulate; petiole (0.5–)1–4(–6) cm; blade broadly ovate to obovate or broadly oblanceolate, 2–8(–10) cm × 10–30(–50) mm, margins lyrate-pinnatipartite; lobes 2–4 on each side, oblong or lanceolate, smaller than terminal lobe, margins subentire or dentate, (terminal lobe ovate, margins dentate). Cauline leaves similar to basal, (distalmost with shorter petiole); blade smaller, margins dentate, lobes 1–3 on each side. Fruiting pedicels divaricate, stout, nearly as wide as fruit, 1–2(–3) mm, (pilose adaxially). Flowers: sepals ascending, oblong, 1.5–2(–2.5) × 0.8–1.5 mm; petals pale spatulate, 1.4–2(–2.5) × 0.2–0.5 mm, claw ca. 0.5 mm; filaments 1.7–2.5(–3) mm; anthers ovate, 0.1–0.2 mm. Fruits narrowly linear, straight, obscurely torulose, stout, (1.7–)2–4.5(–5.2) cm × 0.9–1.2 mm; valves glabrous; ovules 30–46(–54) per ovary; style (slender) 0.5–1(–2) mm; stigma prominently 2-lobed. Seeds 0.9–1.3 × 0.4–0.6 mm. 2n = 14.

Phenology: Flowering Jan–Oct.
Habitat: Waste grounds, abandoned fields, disturbed sites
Elevation: 300-1900 m


V7 1147-distribution-map.gif

Introduced; Calif., Europe, introduced also in South America (Argentina), Australia.


Sisymbrium erysimoides apparently is naturalized in the flora area in Riverside County.

Selected References


Lower Taxa

... more about "Sisymbrium erysimoides"
Ihsan A. Al-Shehbaz +
Desfontaines +
Calif. +, Europe +, introduced also in South America (Argentina) +  and Australia. +
300-1900 m +
Waste grounds, abandoned fields, disturbed sites +
Flowering Jan–Oct. +
Fl. Atlant. +
Weedy +  and Introduced +
Chamaeplium +, Norta +, Pachypodium +, Schoenocrambe +  and Velarum +
Sisymbrium erysimoides +
Sisymbrium +
species +