Rorippa calycina

(Engelmann ex Hayden) Rydberg
Mem. New York Bot. Gard. 1: 175. 1900.
Basionym: Nasturtium calycinum Engelmann ex Hayden in G. K. Warren, Prelim. Rep. Expl. Nebraska Dakota, 156. 1859
Synonyms: Nasturtium sinuatum var. calycinum (Engelmann ex Hayden) S. Watson Nasturtium sinuatum var. pubescens S. Watson Radicula calycina (Nuttall) Hitchcock Rorippa sinuata var. pubescens (S. Watson) Howell
Treatment appears in FNA Volume 7. Treatment on page 498. Mentioned on page 495.

Perennials; (terrestrial or of wet habitat, not submerged); densely hirsute throughout, (trichomes pointed, expanded basally). Stems (simple or few from base), erect to prostrate, branched distally, 1–4 dm. Basal leaves not rosulate; blade margins sinuate. Cauline leaves sessile; blade oblong to oblanceolate (lateral lobes oblong to ovate), 2.5–5.5(–7) cm × 5–13 mm, base auriculate to amplexicaul, margins sinuate. Racemes elongated. Fruiting pedicels ascending to suberect, (somewhat appressed to rachis), straight or curved, 2–5(–6) mm (glabrous or sparsely hirsute). Flowers: sepals (persistent after anthesis), ascending, oblong-ovate, 2–3.3 × 0.7–1.3 mm; petals yellow, oblanceolate, (2.2–)2.5–3.7 × 0.7–1.4 mm; median filaments 1.8–2.2 mm; anthers oblong, 0.5–0.6 mm. Fruits silicles, straight, globose or broadly oblong, 2–4 × 1.5–2.5 mm; valves short-strigose; ovules 30–44 per ovary; style 1–2.5 mm. Seeds biseriate, yellowish, ovoid, 0.6–0.7 mm (0.4–0.6 mm diam.), colliculate. 2n = 16.

Phenology: Flowering May–Aug.
Habitat: Stream edges, sandy riverbanks, reservoir, pond, and lake margins
Elevation: 1000-2000 m


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N.W.T., Mont., N.Dak., Wyo.


G. A. Mulligan and A. E. Porsild (1966) reported Rorippa calycina from Northwest Territories and suggested that it may have been introduced to Canada from the main species range in the United States about 4000 km south.

Selected References


Lower Taxa


... more about "Rorippa calycina"
Ihsan A. Al-Shehbaz +
(Engelmann ex Hayden) Rydberg +
Nasturtium calycinum +
N.W.T. +, Mont. +, N.Dak. +  and Wyo. +
1000-2000 m +
Stream edges, sandy riverbanks, reservoir, pond, and lake margins +
Flowering May–Aug. +
Mem. New York Bot. Gard. +
Nasturtium sinuatum var. calycinum +, Nasturtium sinuatum var. pubescens +, Radicula calycina +  and Rorippa sinuata var. pubescens +
Rorippa calycina +
species +