Living plants are a valuable addition to vivaria for many reasons. In fact, they are so beneficial that they really should be considered a standard component of most vivaria for most kinds of herps. There are reasons why seasoned keepers of many of the more rare, pricey and difficult herps tend to know about, and use, a lot of living plants, and why. The beauty and naturalistic look plants bring to a vivarium are important considerations but by no means the only ones.
Here is a great article to read more on Live Plants in your Terrarium