Northern Prairie Wildlife Research Center
Purple Cress (Cardamine douglassii)
- Family: Mustard (Brassicaceae)
- Flowering: March-April.
- Field Marks: Purple cress is the only
Cardamine that has large pink-purple flowers and merely
toothed, never deeply lobed leaves.
- Habitat: Low woods, marshes.
- Habit: Perennial herbs with short, thick tubers.
- Stems: Erect, usually unbranched, hairy or rarely
- Leaves: Of 2 kinds, the basal nearly orbicular, on
long leaf stalks, the leaves of the stem alternate, simple,
lanceolate, pointed at the tip, tapering, rounded, or even
clasping at the sessile base, usually toothed, smooth or slightly
hairy, up to 2 inches long.
- Flowers: Several in terminal racemes, pink-purple,
with slender leaf stalks.
- Sepals: 4, green, tinged with purple.
- Petals: 4, pink-purple, free from each other, 1/3-1
- Stamens: 6.
- Pistils: Ovary superior.
- Fruits: Pods linear, slender, up to 1 inch long, with
a sterile beak up to 1/5 inch long; seeds dark brown, about 1/12
Previous Species -- Spring Cress (Cardamine bulbosa)
Return to Species List -- Group 8
Lambsquarter (Chenopodium album)