The plant is poisonous.
Application
The plant has a strengthening effect on the heart and circulation. No longer used as the effect is extremely difficult to control. The bark has been used as an emetic. Crushed plant parts have been used externally for rheumatism and cramps.
Being studied for effectiveness against certain types of cancer.
Ingredients
Coronilin, hyrcanoside, daphnoretin, scopoletin, and umbelliferone.

Coronilla varia L.
Photo of page in Joachim Burser's herbarium.