Here are common spring time plants and other toxins to keep your pets away from. Lilies – Members of the Lilium spp. are considered to be highly toxic to cats. While the poisonous component has not yet been identified, it is clear that with even ingestion of very small amounts of the plant, severe kidney damage could result. Tulip/Narcissus bulbs – The bulb portions of Tulipa/Narcissus spp. contain toxins that can cause intense gastrointestinal irritation, drooling, loss of appetite, depression of the central nervous system, convulsions and cardiac abnormalities. Amaryllis – Common......