Samandaridine is an extremely toxic alkaloid produced by the skin glands of various salamanders.

Gelsemine is a toxic alkaloid found in the plant Gelsemium sempervirens.

Their roots resemble potatoes and they produce extremely toxic alkaloids, whose structure has not yet been worked out, in large quantities.

It contains highly poisonous alkaloids toxic to all classes of domesticated grazing animals.

Many members of this genus contain toxic and medicinal alkaloids.

The plant contains toxic alkaloids including lupinine and the teratogenic anagyrine.

This is attributed to an unnamed toxic alkaloid.

The plant contains bitter and toxic alkaloids such as hordenine.

In the winter months, the plant degrades and metabolizes most of its toxic alkaloids.

These pods rattle when mature and they contain toxic alkaloids.