Keep in mind the closer you get to the coasts the more flooding i'll add in. Because of the mutations and the humidity it's all basicallly going to resemble a jungle. 

P.s. i'd like to remove all previous statements on this subhect. All plants are toxic. Excluding what has been "created" by humankind. (Farms and etc.)

I think that would add more challenge and depth to the story.

They can have medicinal uses if treated properly with a solution i am totally making up right now and calling Purge.

Any qualms with this change? 
(Add purgue solution to gear if applicable)