I read only the beginning of this book, and it was decades ago, but I always wondered about it and wanted to read it. As I recall, the protagonist finds himself stranded on a strange world. I don't remember how he got there, such as whether his spaceship crashed, or he just woke up there with amnesia, or whatever. But as he explored the world, the plants seemed to be a sort of mix between biological and technological. Regarding the technological nature of the plants, I really don't remember the details. If I remember correctly, it was as if the plants had been somehow designed to be useful in some way.
This sounds like Sentenced To Prism by Alan Dean Foster (1985).
Prism is a unique planet because its ecosystem contains both silicon-based and carbon-based life. Evan Orgell, a management troubleshooter sent to Prism to investigate the disappearance of a research group, finds himself fighting for his survival in this strange crystalline environment after his specialized environment suit succumbs to the local elements.