Northern Prairie Wildlife Research Center
Yellow Corydalis (Corydalis flavula)
- Family: Poppy (Papaveraceae)
- Flowering: April-May.
- Field Marks: Corydalis flavula is the only species in the genus that has a tiny spur at the base of the corolla that points inward.
- Habitat: Low woods, along streams.
- Habit: Annual herb with fibrous roots.
- Stems: Spreading to more or less erect, much branched, smooth, slender, up to 10 inches long.
- Leaves: Alternate, much divided and almost "fern-like," gray-green, smooth, the lowermost on long stalks, the uppermost with short or no stalks.
- Flowers: Several in racemes, each flower yellow, 1/3-1/4 inch long.
- Sepals: 2, green, small, falling off early.
- Petals: 4, yellow, one of them protruding at the base into a very short, incurved spur, the inner petals with a toothed ridge down their back.
- Stamens: 6, in 2 sets of 3.
- Pistils: Ovary superior.
- Fruits: Capsules elongated, smooth, up to 1 1/2 inches long, constricted between the seeds.
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