Spring toxin 4: Crocuses
Some crocuses bloom in the spring, while others bloom in the fall (Colchicum autumnale). The spring plants, which are more common and are part of the Iridaceae family, can cause general gastrointestinal upset, including vomiting and diarrhea. These should not be mistaken for autumn crocus plants, part of the Liliaceae family, which contain colchicine.
The autumn crocus, also known as Meadow Saffron, is highly toxic and can cause severe vomiting, gastrointestinal bleeding, liver and kidney damage, and respiratory failure. These signs can begin immediately after ingestion or may be delayed for a number of days. Regardless of when the signs begin, the pet should be brought for medical treatment immediately after ingestion, and the client should bring the plant, as well.