|Natural range in North America|
The common name Dutchman's breeches derives from their white flowers that look like white breeches.
Height is 15–40 cm. The root is a cluster of small pink to white teardrop-shaped bulblets (more precisely, miniature tubers). Leaves are 10–36 cm long and 4–18 cm broad, with a petiole up to 15 cm long; they are trifoliate, with finely divided leaflets.
Flowers are usually white, rarely pink, 1–2 cm long, and are borne in early spring on flower stalks 12–25 cm long. The pistil of a pollinated flower develops into a long pod, narrowed to a point on both ends, 9–13 millimetres (0.4–0.5 in) long.
The pod splits in half when the seeds are ripe. The seeds are kidney-shaped, with a faint netlike pattern. Each one has a fleshy organ called an elaiosome that attracts ants. Dutchman's breeches is one of many plants whose seeds are spread by ants, a process called myrmecochory. The ants take the seeds to their nest, where they eat the elaiosomes, and put the seeds in their nest debris, where they are protected until they germinate. They also get the added bonus of growing in a medium made richer by the ant nest debris.
The leaves and flower stems die back in late spring after the seed has ripened, and the bulblets remain dormant through the summer. In the fall, starch in the bulblets is converted to sugar, and the beginnings of the next spring's leaves and flowers develop below ground.
The western populations have sometimes been separated as Dicentra occidentalis on the basis of often somewhat coarser growth, but do not differ from many eastern plants in the Appalachians.
Native Americans and early white practitioners considered this plant useful for syphilis, skin conditions and as a blood purifier. Dutchman's breeches contains several alkaloids that may have effects on the brain and heart.
However, D. cucullaria may be toxic and causes contact dermatitis in some people.
Dicentra cucullaria is dependent on bumblebees (especially Bombus bimaculatus, a common eastern North American species) for cross-pollination. In fact, the flower structure and mechanism by which it is pollinated indicate that it is adapted for bumblebees, which can separate the outer and inner petals of the flower. They will then use their front legs to expose the stigma, stamen, and anthers. Shortly afterwards, they will sweep pollen in a forward stroke by utilizing their middle legs, before leaving the flower to return to the colony with the pollen. In this way, D. cucullaria is pollinated as the bees move from plant to plant, and the bumblebee meets its dietary needs.
- Macior, Lazarus Walter (1970-01-01). "The Pollination Ecology of Dicentra cucullaria". American Journal of Botany. 57 (1): 6–11. doi:10.2307/2440374.
- "Pollen-Foraging Behavior of Bombus in Relation to Pollination of Nototribic Flowers on JSTOR" (PDF). www.jstor.org. Retrieved 2015-11-05.
- Tebbitt, Mark C.; Lidén, Magnus; Zetterlund, Henrik (2008-01-01). Bleeding Hearts, Corydalis, and Their Relatives. Timber Press. ISBN 9780881928822.
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