I'm an expert in the field of fictional species from popular media, particularly those from the Marvel Universe. When discussing the character of Groot, it's important to note that he is a fictional character and not a real-life species.

Groot is a member of the extraterrestrial species known as the "Flora colossi." This species is characterized by their humanoid tree-like appearance and their ability to regenerate and manipulate their own bodies. Groot is particularly known for his limited but powerful vocabulary and his catchphrase, "I am Groot," which he uses to communicate with his fellow Guardians of the Galaxy.

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Groot was an extraterrestrial being that had the appearance of a tree, and his race was thought to be extinct. It was determined that that his species was called Floral Colossus, by the Kree. Groot initially traveled to Earth seeking humans as test subjects.read more >>