Rorippa curvipes |
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blunt-leaf yellow-cress, common yellow-cress, truncate yellowcress |
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Habit | Annuals or, rarely, perennials; (short-lived, terrestrial or of wet habitat, not submerged); glabrous or hirsute, (trichomes cylindrical). |
Stems | (few to several from base), usually ascending, decumbent, or prostrate, rarely erect, branched distally, 1–4.2(–5) dm, (hirsute proximally). |
Basal leaves | not rosulate; blade margins pinnatifid. |
Cauline leaves | shortly petiolate or sessile; blade oblong or oblanceolate to obovate, (terminal lobe oblong), (2–)3.5–10(–12) cm × (5–)10–30(–37) mm, (lateral lobe smaller than terminal), base usually auriculate, rarely amplexicaul, margins: proximal pinnatifid or sinuate, distal dentate or entire, (surfaces sparsely pubescent). |
Racemes | elongated. |
Flowers | sepals erect, oblong, 0.8–1.8 × 0.5–1 mm; petals (erect), yellow, oblanceolate to spatulate, 0.5–1.8 × 0.2–1 mm; median filaments 0.9–1.3mm; anthers ovate, 0.3–0.5 mm. |
Fruiting pedicels | divaricate-ascending to horizontal, straight or recurved, (1.2–)1.7–5(–8) mm. |
Fruits | silicles or siliques, curved, ovoid to pyriform, 2–8(–8.8) × (0.5–)1–2.5 mm; valves glabrous; ovules (20–)30–80 per ovary; style 0.3–1 mm. |
Seeds | biseriate, brown, cordiform, 0.5–0.7 mm, colliculate. |
2n | = 16. |
Rorippa curvipes |
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Phenology | Flowering May–Sep. |
Habitat | Muddy shores of lakes and ponds, stream beds and banks, edges of cultivated fields, wet roadside, meadows, seepage areas, ditches, creeks, gravel bars |
Elevation | 100-3500 m (300-11500 ft) |
Distribution |
AR; AZ; CA; CO; ID; IL; KS; MI; MN; MO; MT; ND; NE; NM; NV; OR; SD; TX; UT; WA; WY; AB; BC; SK; Mexico (Coahuila)
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Source | FNA vol. 7, p. 499. |
Parent taxa | Brassicaceae > tribe Cardamineae > Rorippa |
Sibling taxa | |
Synonyms | Cardamine palustris var. jonesii, Radicula curvipes, Radicula integra, Radicula sinuata var. integra, Radicula sinuata var. truncata, Radicula underwoodii, R. curvipes var. integra, R. curvipes var. truncata, R. integra, R. obtusa var. integra, R. truncata, R. underwoodii |
Name authority | Greene: Pittonia 3: 97. (1896) |
Web links |
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