Rorippa curvipes var. truncata (Jepson) Rollins
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Family: Brassicaceae
Genus: Rorippa
Species Synonyms: Rorippa obtusa var. integra (Rydb.) Victorin
Radicula sinuata var. truncata Jepson
Rorippa curvipes var. integra (Rydb.) R. Stuckey
Rorippa truncata (Jepson) R. Stuckey
Common Names: bluntleaf yellowcress
wild yellowcress
curved yellowcress
Canada: southwestern British Columbia - southern Alberta - southern Saskatchewan
Saskatchewan: southern Saskatchewan; Hoosier - Kindersley - Pangman
Ecoregion: Mixed Grassland, Moist Mixed Grassland
Saskatchewan: non-alkaline, drying mudflats and edges of sloughs in sandy or clay soil
Associated Species: Alopecurus aequalis, Beckmannia syzigachne, Gnaphalium palustre, Limosella aquatica, Polygonum sp., Rumex sp., Spergularia salina, Veronica peregrina
Provincial Status According
to Harms (2003):
Nature Conservancy Status:
G5T5 S2S3
Saskatchewan Species at
Risk Status:
Why rare?
Height: 10 – 40 cm (long)
Roots: taproot
Stems: annual, several, tufted, decumbent to prostrate, branched, glabrous
Leaves: basal and cauline, basal leaves grading into cauline, alternate, short-petiolate, may be slightly auriculate, 3 – 10 cm long, 7 – 20 mm wide, deeply to shallowly pinnately lobed, lobes entire to dentate, terminal lobe larger than lateral lobes and ovate, apex obtuse, hyaline ridges on midrib
Inflorescence: raceme lateral, many-flowered, elongating in fruit; pedicels short
Flowers: calyx 0.9 – 1.5 mm long, slightly saccate; corolla 0.9 – 1.2 mm long, whitish; style linear, straight, abruptly attached to obtuse apex; stigma expanded, disk-like
Fruits: silique short, 3.5 – 5.5 mm long, 2 – 4 times longer than wide, 1.8 – 2.5 times longer than pedicels, cylindrical, constricted at center, glabrous, readily dehiscent; seeds 30 – 80 per silique, 0.5 mm long
1 Corolla longer than calyx
1 Corolla shorter than or equal to calyx
2 Middle and upper leaves serrate to nearly entire, not pinnatifed; pedicels usually 3 – 4 times longer than fruit; siliques globose to subglobose
R. austriaca
2 Middle and upper leaves pinnatifed, the divisions toothed; pedicels only slightly longer than fruit; siliques cylindrical
3 Stems erect; leaves and stem glabrous or sparingly pubescent, lacking trichomes; leaf divisions acute, toothed
R. sylvestris
3 Stems decumbent to prostrate; leaves and stems with trichomes; leaf divisions obtuse, entire to denticulate
R. sinuata
4 Stems sparingly to densely hirsute below
4 Stems glabrous throughout
5 Leaves thin, upper and lower pinnatifed; pods 3 – 4 mm long
R. palustris var. palustris
5 Leaves firm, upper leaves dentate to shallowly lobed; pods 2 – 9 mm
6 Stems sparsely hirsute below; siliques slenderly ellipsoid, 3 – 9 mm long
R. palustris var. fernaldiana
6 Stems densely hirsute below; siliques subglobose, 2 – 5.5 mm long
R. palustris var. hirsuta
7 Fruiting styles straight; silique 2 – 4 times longer than wide, glabrous, constricted at center
R. curvipes var. truncata
7 Fruiting styles tapering towards the apex; silique more than 4 times as long as wide, with minute papillae, not constricted at center
R. tenerrima