Sisymbrium polyceratium |
Sisymbrium orientale |
|
---|---|---|
shortfruit hedgemustard |
eastern rocket, eastern tumble-mustard, Indian hedge-mustard |
|
Habit | Annuals; (densely leafy throughout); often glabrous. | Annuals; glabrous or pubescent. |
Stems | (simple or few to several from base), erect or ascending to subprostrate, branched distally, 1–5(–7) dm, glabrous. |
erect, branched distally, (1–)2–7(–8.5) dm, sparsely to densely (soft) pubescent at least basally, usually glabrous distally. |
Basal leaves | (soon withered); initially rosulate; petiole (1–)2–5(–6.5) cm; blade oblanceolate to lanceolate (in outline), 2–7(–10) cm × 10–30(–45) mm, margins sinuate- or runcinate-pinnatifid to coarsely dentate; lobes 3–6 on each side, often triangular, slightly smaller than terminal lobe, margins dentate or subentire. |
rosulate; petiole (1–)2–5(–9) cm; blade broadly oblanceolate to oblong-oblanceolate (in outline), 3–8(–10) cm × (10–)20–40(–60) mm, margins runcinate-pinnatipartite; lobes 2–5 on each side, oblong or lanceolate, much smaller than terminal lobe, margins subentire or dentate, (terminal lobe lanceolate, deltate, or often hastate). |
Cauline leaves | (sometimes bracts, several), similar to basal, (shortly petiolate); blade margins dentate or subentire, (surfaces glabrous or sparsely puberulent at and near margin). (Inflorescences 2–4(–6)-fasciculate, or flowers solitary and axillary, bracteate throughout.) Fruiting pedicels ascending to erect, stout, narrower than fruit base, 0.5–1(–2) mm. |
similar to basal; (distalmost) blade with 1 or 2 lobes on each side, much smaller than terminal lobe, (terminal lobe narrowly lanceolate, linear, or hastate). |
Flowers | sepals erect, oblong, 1–1.5 × 0.3–0.5 mm; petals spatulate, 1.5–2 × 0.4–0.6 mm, claw 0.6–1 mm; filaments (erect, yellowish), 1.2–1.7mm; anthers ovate, 0.3–0.5 mm. |
sepals ascending, oblong, 3.5–5.5 × 1–2 mm; petals spatulate, (6–)7–9(–10) × 2.5–4 mm, claw 3–5.5 mm; filaments (4–)5–8 mm; anthers oblong, 1–1.8 mm. |
Fruiting pedicels | ascending to subdivaricate, stout, nearly as wide as fruit, 3–6 mm. |
|
Fruits | (erect to ascending), subulate-linear, recurved, straight, slightly torulose, stout (widest at base), 1–2(–2.3) cm × 0.9–1.7 mm; valves usually glabrous, rarely puberulent; ovules 20–44(–54) per ovary; style 0.5–1 mm; stigma slightly 2-lobed. |
narrowly linear, straight, smooth, stout, (5–)6–10(–13) cm × 1–1.5 mm; valves glabrous or pubescent; ovules (60–)80–100(–140) per ovary; style (subclavate), 1–3(–4) mm; stigma prominently 2-lobed. |
Seeds | 0.7–1 × 0.4–0.5 mm. |
1–1.5 × 0.7–0.9 mm. |
2n | = 28. |
= 14. |
Sisymbrium polyceratium |
Sisymbrium orientale |
|
Phenology | Flowering Mar–Jun. | Flowering Mar-early Jun. |
Habitat | Waste grounds, disturbed sites, roadsides | Waste grounds, roadsides, disturbed sites |
Elevation | 0-200 m (0-700 ft) | 0-1300 m (0-4300 ft) |
Distribution |
PA; TX; Europe; w Asia; c Asia; nw Africa [Introduced in North America] |
AZ; CA; MA; NV; OR; TX; WA; BC; Europe; sw Asia; n Africa [Introduced in North America; introduced also in Central America, South America, Australia]
|
Source | FNA vol. 7, p. 669. | FNA vol. 7, p. 670. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Chamaeplium polyceratium | |
Name authority | Linnaeus: Sp. Pl. 2: 658. (1753) | Linnaeus: Cent. Pl. II, 24. (1756) |
Web links |
|