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Western Wetland Flora

Field Office Guide to Plant Species

Spreading Yellow-cress
Rorippa sinuata (Nutt.) A. Hitchc.

JPG -- Species Photo JPG -- Distribution Map

Family: Mustard (Cruciferae)
Flowering: April-September
Field Marks: Unlike other species of Rorippa, this one has yellow petals 1/4-1/3 inch long, creeping rootstocks, and slender, more or less straight, pods.
Habitat: Moist areas.
Habit: Perennial herb with creeping rootstocks.
Stems: Upright, branched, up to 1 foot tall, smooth.
Leaves: Alternate, deeply pinnately divided into 11-19 lobes, the lobes linear to oblong, smooth.
Flowers: Several in terminal racemes; each flower with a stalk 1/4-1/2 inch long.
Sepals: 4, green, free from each other, up to 1/6 inch long.
Petals: 4, yellow, free from each other, 1/6-1/4 inch long.
Stamens: 6.
Pistils: Ovary superior.
Fruits: Pods linear, more or less straight, 1/3-1/2 inch long, smooth, with small brown seeds.

Previous Species -- Curve-pod Yellow-cress (Rorippa curvisiliqua )
Return to Species List -- Group 6
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Page Last Modified: Saturday, 02-Feb-2013 06:26:42 EST
Menlo Park, CA [caww54]