Bluebonnets are indigenous to the U.S. and grow mostly in Texas, but they can be grown in any region.
The plant grows pods of seeds after flowering. The seeds are small and multi-colored but the most common colors are blue or tan.
All plants in the Lupinus family, including bluebonnets, can be toxic to humans and animals. The seeds are the most toxic part of the plant. Some species are more toxic at different times of the year.
Sensitivity to the seeds' toxins can depend on a variety of factors, including age, weight and physical condition. Children are particularly vulnerable to poisoning because of their smaller body weight.
In addition to the plant's own toxicity, it can also absorb pesticides and chemicals in the water or soil.