Does anyone have experience with this plant and tortoises? I saw it growing in some tortoise pens and it tolerates my extreme climate very well. Its not really clear if its toxic or not, or even better, if its edible. If its not toxic this plant would be a great way for me to add vegetation to my enclosures. Same for anyone in AZ or other desert areas. The tortoise in the pens had been living with it for years and their hatchling babies seems healthy too.