Cardamine hirsuta
- Several photographs of Hairy Bittercress and its identifying features.
- http://www.plant-identification.co.uk/skye/cruciferae/cardamine-hirsuta.htm

Cardamine flexuosa
- Several photographs of Wavy Bittercress and the plant’s identifying features.
- http://www.plant-identification.co.uk/skye/cruciferae/cardamine-flexuosa.htm

Cardamine pratensis
- Several photographs and a description of the Cuckoo Flower.
- http://www.plant-identification.co.uk/skye/cruciferae/cardamine-pratensis.htm

Cardamine pensylvanica
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- http://plants.usda.gov/java/profile?symbol=CAPE3

Cardamine bulbosa
- Bulbous Bittercress.
- http://plants.usda.gov/java/profile?symbol=CABU3

Cardamine douglassii
- Limestone Bittercress.
- http://plants.usda.gov/java/profile?symbol=CADO

Cardamine cordifolia var. lyallii (Heartleaf Bittercress)
- Image and brief facts.
- http://www.cwnp.org/photopgs/cdoc/cacordifolia.html