Austrian fieldcress USDA PLANTS Symbol: ROAU
U.S. Nativity: Exotic
Habit: Forbs/Herbs
Rorippa austriaca (Crantz) Bess.

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Taxonomic Rank: Magnoliopsida: Capparales: Brassicaceae
Synonym(s): Austrian yellowcress
Native Range: temp. Asia & Europe (GRIN);

Appearance
Rorippa austriaca is a perennial herbaceous plant that can grow up to 3.3 ft. (1 m) tall.
Foliage
Leaves are sessile, clasping, bluish green, 1.2-3.9 in. (3-10 cm) long, oblong to oblanceolate, glabrous, and entire to dentate.
Flowers
Flowers are yellow in color and grow in clusters at the ends of the stems. Sepals are 0.08-0.1 in. (2-2.5 mm) across, and petals are 0.12-0.2 in. (3-5 mm) across.
Fruit
Fruits are ovate, 0.09-0.12 in. (2.4-3 mm) wide, and ascending. Seeds are 0.03-0.04 in. (0.7-0.9 mm) long, rough, and reddish brown in color.
Ecological Threat
R. austriaca prefers disturbed areas including roadsides and mudflats. It is native to Europe.

Selected Images from Invasive.orgView All Images at Invasive.org


Plant(s);
Elizabeth Bella, USDA Forest Service, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Elizabeth Bella, USDA Forest Service, Bugwood.org
Additional Resolutions & Image Usage

Plant(s);
Elizabeth Bella, USDA Forest Service, Bugwood.org
Additional Resolutions & Image Usage

Plant(s);
Elizabeth Bella, USDA Forest Service, Bugwood.org
Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.


Invasive Listing Sources:
Pacific Northwest Exotic Pest Plant Council, 1998