Log In New Account Sitemap
  • Home
  • Specimen Search
    • Search Collections
    • Map Search
    • Exsiccati Search
  • Images
    • Browse
    • Search
  • Flora Projects
    • State Inventories
    • Indiana
    • Ohio
    • Wisconsin
    • Aquatic Invasive Plant Guide
  • Interactive Tools
    • Dynamic Checklist
    • Dynamic Key
  • Crowdsource
Rorippa subumbellata Rollins  
Go To Encyclopedia of Life...
Family: Brassicaceae
Lake Tahoe Yellowcress
Rorippa subumbellata image
  • FNA
  • Web Links
Ihsan A. Al-Shehbaz in Flora of North America (vol. 7)
Perennials; (terrestrial or of wet habitat, not submerged, with underground rhizomes); gla-brous or pilose, (trichomes crisped). Stems decumbent, much-branched distally, 0.5-2.5 (-3) dm, (glabrous or pilose proximally). Basal leaves not rosulate; blade margins subpinnatifid to sinuate. Cauline leaves sessile or shortly petiolate; blade broadly oblanceolate to oblong, (lateral lobes oblong to ovate), 1-3.2 cm × 3-12 mm, base not or minutely auriculate, margins subpinnatifid to sinuate, or (lateral lobes) usually entire, (surfaces pilose or adaxially glabrous). Racemes (subumbellate), not or slightly elongated. Fruiting pedicels erect to divaricate-ascending, straight, 3-7(-9) mm, (pilose). Flowers: sepals (persistent), erect, oblong or ovate, 2-3 × 1-1.5 mm; petals yellow, spatulate to oblanceolate, 2.5-3.5 × 1-1.7 mm; median filaments 2-2.5 mm; anthers narrowly oblong, 0.8-1.2 mm. Fruits silicles, straight, subglobose to broadly oblong, 3-6 × 2-3.5 mm; valves glabrous; ovules 30-44 per ovary; style 0.8-1.5 mm. Seeds biseriate, yellowish brown, angled, cordiform, 0.8-1.1 mm, strongly colliculate. Flowering Jun-Sep. Shores of lakes, beaches; of conservation concern; 1800-2000 m; Calif., Nev. Rorippa subumbellata appears to be restricted to Tallac and Truckee lakes and Lake Tahoe in eastern California (El Dorado and Placer counties) and western Nevada (Douglas County).

The record by Rollins of n = 5 for the species (see S. I. Warwick and I. A. Al-Shehbaz 2006) is highly unlikely; no such count is known in the entire tribe Cardamineae, to which Rorippa belongs.

Rorippa subumbellata is in the Center for Plant Conservation´s National Collection of Endangered Plants.

  • Encyclopedia of Life
  • W3Tropicos
  • USDA PLANTS Database
  • Flora of North America
  • International Plant Names Index
  • Google Search Engine
  • Google Images
  • BOLD Systems - Barcode of Life Data Systems
  • Global Biotic Interactions (GloBI)
  • NCBI - National Center for Biotechnology Information
Rorippa subumbellata
Open Interactive Map
Rorippa subumbellata image
Rorippa subumbellata image
Rorippa subumbellata image
Rorippa subumbellata image
Rorippa subumbellata image
Rorippa subumbellata image
Rorippa subumbellata image
Rorippa subumbellata image
Rorippa subumbellata image
Rorippa subumbellata image
Rorippa subumbellata image
Rorippa subumbellata image
Rorippa subumbellata image
Click to Display
14 Total Images