Does strychnine come from plants other than the strychnine tree?

Question

A question was asked about where strychnine came from. The answer given was nightshade. In doing my research on the internet, I see the Strychnine Tree, or Nux Vomica, is the source. However, when researching the origin of the name strychnine, it appears to be along the latin lines of strychnon, from a nightshade-related origin. So I'm thinking the name strychnine was borrowed from latin and applied to that tree. No nightshade family plant actually produces strychnine, from what I can tell. The Strychnine Tree does NOT belong to the nightshade family. Any chemists, doctors, botanists out there? PLEASE, no guesses, just facts. I looked on wikipedia, dictionary.com, and yahoo search to come up with what I wrote above. Thank you !!

Answer 1

At least the Silver Morning glory (Argyreia nervosa)contains strychnine. It is of family Convolvulacea.

Poison nut (Strychnos nux-vomica) is most common source. It belongs to family Loganiaceae (sorry for using scientific names - I am not native english speaker and my knowledge of common names of organisms is poor) and is not related to above mentioned morning glory. other Strychnos species also contain strychnine.

Strychnos is greece and means deadly. Nightshades were once referred with that name (roman time)  - they are quite poisonous even if they do not contain strychnine but atropin. This tell-tale name was later given to totally different family.