Part of the confusion is...do you want information about plants that are toxic to ingest or toxic in all ways (sap, oils, etc). For chams who don't tend to chew on foliage you list of plants to avoid will be pretty short. A few species do eat some vegetation (notably veileds) so the toxic plant list will be a bit longer. What species are you planning to keep? Check for toxic plant listings on these sites:

Adcham.com
chameleonnews.com