Narcissus is a yellow and white harbingers of spring. They are toxic is the bulbs are eaten in big quantities. Some people confuse them for onions. Daffodil bulb diners tend to experience nausea, vomiting, cramps, and diarrhea. A doctor may recommend intavenous hydration and/or drugs to stave off nausea and vomiting if symptoms are serve or the patient is a child.