Dutch famine of 1944–45
Tulip bulbs look similar to onions, but should not generally be considered food. The toxicity of bulbs is not well-understood, nor is there an agreed-upon method of safely preparing them for human consumption. There have been reports of illness when eaten, depending on quantity. During the Dutch famine of 1944–45, tulip bulbs were eaten out of desperation, and Dutch doctors provided recipes.
