When injured, bridal bouquet's stems, branches, and leaves exude a white milky latex, a strong skin irritant that can cause problems with the stomach if ingested. All parts of bridal bouquet contain mildly poisonous alkaloids, which is why the ingestion of this plant and direct contact with the skin should be avoided. Symptoms of contact with the sap are redness of the skin and rash, while symptoms of ingestion include stomach cramps and pain.