Rorippa curvipes |
Rorippa sinuata |
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bluntleaf yellowcress, common yellowcress |
spreading yellowcress, western yellowcress |
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Habit | Plants perennial, pubescent with hemispheric or clavate vesicular trichomes; with rhizomes or creeping roots. | |
Stems | decumbent or prostrate, 1–4.2(5) dm. |
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Basal leaves | not rosulate; pinnatifid. |
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Cauline leaves | oblong, oblanceolate, or lanceolate; (1.5)2.5–6.5(9) × 0.5–1.8(2.5) cm, bases uppermost auriculate; margins pinnatifid or sinuate, sessile. |
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Inflorescences | fruiting pedicels divaricate to horizontal, sigmoid or recurved, 4–12(15) mm. |
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Flowers | sepals ascending, caducous, oblong, 2.2–3.7(4.5) mm; petals oblanceolate to spatulate; (2.7)3.2–5.3(6) × 1.5–2.5 mm; ovules (30)50–82(98) per ovary; styles 1–2.5(3.5) mm. |
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Fruits | siliques, oblong to lanceolate or linear, curved; (4)4.7–11.5(16) × (1)1.5–2.5 mm; valves glabrous or with vesicular trichomes; septa complete. |
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Seeds | biseriate, angular cordiform, 0.7–1 × 0.5–0.6 mm, yellow-brown. |
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2n | =16. |
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Rorippa curvipes |
Rorippa sinuata |
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Distribution | ||
Discussion | Shores of ponds and lakes, streambanks, fields, ditches. Flowering May–Jul. 900–2000 m. BR, Owy. CA, ID, NV, WA; southern Canada, throughout US except eastern seaboard. Native. |
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Source | Flora of Oregon, volume 2, page 507 Ihsan Al-Shehbaz |
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Sibling taxa | ||
Synonyms | Rorippa curvipes var. curvipes, Rorippa curvipes var. truncata | |
Web links |
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