OregonFlora: Rorippa curvipes vs. Rorippa calycina

	Rorippa curvipes	Rorippa columbiae (synonym of Rorippa calycina)
	bluntleaf yellowcress, common yellowcress	Columbia yellowcress
Habit		Plants perennial, pilose; with creeping roots and adventitious stems.
Stems		1–3.2(4.1) dm.
Basal leaves		absent.
Cauline leaves		oblanceolate to oblong, 2.4–5.2 × 0.5–1.2 cm, bases often auriculate; margins sinuate to pinnatifid; short-petiolate or sessile.
Inflorescences		fruiting pedicels ascending, subappressed to rachis; (3)4–10(12) mm.
Flowers		sepals ascending, persistent, 2–3.5 mm, pilose; petals oblanceolate to spatulate, 2.7–4.2 × 0.7–1.7 mm; ovules 24–40 per ovary; septa complete; styles (0.7)1–3.2 mm, pilose.
Fruits		silicles, subglobose, oblong, or ellipsoid; straight; (1.5)2.5–5.5(7) × (1)1.7–2.8(3.5) mm, densely pilose; valves pilose.
Seeds		biseriate; ovoid-globose, 0.7–0.9 mm; yellowish brown.

	Rorippa curvipes	Rorippa columbiae
Distribution	[WildflowerSearch map] [BONAP county map]	[BONAP county map]
Discussion		Meadows, streambanks, ditches, lake and pond margins, wet fields, roadsides, gravel bars. Flowering Jun–Nov. 0–1700 m. BR, Casc, Col, ECas, Lava, Sisk, WV. CA, WA. Native.
Source		Flora of Oregon, volume 2, page 505 Ihsan Al-Shehbaz
Sibling taxa	R. austriaca, R. columbiae, R. curvisiliqua, R. indica, R. palustris, R. sinuata, R. sylvestris, R. tenerrima	R. austriaca, R. columbiae, R. curvipes, R. curvisiliqua, R. indica, R. palustris, R. sinuata, R. sylvestris, R. tenerrima
Synonyms	Rorippa curvipes var. curvipes, Rorippa curvipes var. truncata	Rorippa calycina, Rorippa calycina var. columbiae
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: OR Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Rorippa curvipes

Rorippa columbiae

(synonym of Rorippa calycina)

bluntleaf yellowcress, common yellowcress

Columbia yellowcress

Habit

Plants perennial, pilose; with creeping roots and adventitious stems.

Stems

1–3.2(4.1) dm.

Basal leaves

absent.

Cauline leaves

oblanceolate to oblong, 2.4–5.2 × 0.5–1.2 cm, bases often auriculate;

margins sinuate to pinnatifid; short-petiolate or sessile.

Inflorescences

fruiting pedicels ascending, subappressed to rachis; (3)4–10(12) mm.

Flowers

sepals ascending, persistent, 2–3.5 mm, pilose;

petals oblanceolate to spatulate, 2.7–4.2 × 0.7–1.7 mm;

ovules 24–40 per ovary;

septa complete;

styles (0.7)1–3.2 mm, pilose.

Fruits

silicles, subglobose, oblong, or ellipsoid; straight; (1.5)2.5–5.5(7) × (1)1.7–2.8(3.5) mm, densely pilose;

valves pilose.

Seeds

biseriate; ovoid-globose, 0.7–0.9 mm; yellowish brown.

Rorippa curvipes

Rorippa columbiae

Distribution

[WildflowerSearch map]

[BONAP county map]

Discussion

Meadows, streambanks, ditches, lake and pond margins, wet fields, roadsides, gravel bars. Flowering Jun–Nov. 0–1700 m. BR, Casc, Col, ECas, Lava, Sisk, WV. CA, WA. Native.

Source

Flora of Oregon, volume 2, page 505
Ihsan Al-Shehbaz

Sibling taxa