Tulips and Hyacinths
Tulips are one of the most recognizable plants in the world. In Holland, they line just about every street. Here in the US, they are planted and seen in the Spring. There is even a song about them "Tiptoe through the Tulips". For cats especially, Tulips can be lethal. Their bulbs are the most potent portion of the plant, but even the leaves and stem can pose a serious risk. If there is any question about possible ingestion of a Tulip, immediate veterinary care (especially for cats) is needed.