All Floras      Advanced Search
FNA Vol. 7 Page 494, 495, 496, 498, 501, 502 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 7 | Brassicaceae | Rorippa

14. Rorippa palustris (Linnaeus) Besser, Enum. Pl. 27. 1821. (as Roripa).

Sisymbrium amphibium Linnaeus var. palustre Linnaeus, Sp. Pl. 2: 657. 1753; Brachiolobos palustris (Linnaeus) Clairville; Cardamine palustris (Linnaeus) Kuntze; Caroli-Gmelina palustris (Linnaeus) P. Gaertner, B. Meyer & Scherbius; Myagrum palustre (Linnaeus) Lamarck; Nasturtium palustre (Linnaeus) de Candolle; Radicula palustris (Linnaeus) Moench

Annuals or, rarely, perennials; (short-lived, terrestrial or of wet habitat, not submerged); usually glabrous, rarely hirsute, (trichomes cylindrical). Stems (often simple from base), erect, branched distally, (0.5-)1-10 (-14) dm, (sometimes hirsute proximally). Basal leaves rosulate; blade [(4-)6-20(-30) cm × 10-50(-80) mm] margins lyrate-pinnatisect, (abaxial surface sometimes hirsute). Cauline leaves petiolate or subsessile; blade lyrate-pinnatisect, (lateral lobes oblong or ovate when present), (1.5-)2.5-10(-18) cm × (5-)8-25(-30) mm, (lateral lobes smaller than terminal), base auriculate or amplexicaul, margins subentire or irregularly dentate, sinuate, serrate, or crenate, (abaxial surface sometimes hirsute). Racemes often considerably elongated. Fruiting pedicels divaricate or slightly to strongly reflexed, straight or curved, (2.5-)3-10(-14) mm. Flowers: sepals erect, oblong, 1.5-2.4(-2.6) × 0.5-1 mm; petals yellow or pale yellow, spatulate, (1.5-)1.8-2.5(-3) × 0.5-1.5(-2) mm; median filaments 1-2.5 mm; anthers ovate, 0.3-0.5 mm. Fruits usually silicles, rarely siliques, often slightly curved, oblong, ellipsoid, or oblong-ovoid, (2.5-)4-10 × (1.5-)1.7-3(-3.5) mm; ovules 20-90 per ovary; style 0.2-1(-1.2) mm. Seeds biseriate, brown to yellowish brown, ovoid or subglobose, 0.5-0.7(-0.9) mm (0.4- 0.6(-0.7) mm diam.), colliculate.

Subspecies 2 (2 in the flora): North America, Europe, Asia; introduced in n Mexico, South America, Australia.

1 Stems and abaxial leaf blade surfaces usually glabrous, rarely sparsely pubescent proximally.   14a Rorippa palustris subsp. palustris
+ Stems and abaxial leaf blades surfaces often densely hirsute.   14b Rorippa palustris subsp. hispida

Lower Taxa


Related Objects  
  • Distribution Map
  • Map

    Flora of China  
  • Image/JPEG (Photo: Al-Shehbaz)
  • Image/JPEG
  • Illustration
  • Illustration
    Photos by The Biodiversity of the Hengduan Mountains Project  
  • Image File (David Boufford)
  • Image/JPEG

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |