Flora, fauna, robot

Solution 1:

From singular automaton - a self-operating machine or mechanism, especially a robot, a logical term for "robot-kind" as distinct from flora/fauna is the plural automata.

Solution 2:

Forma is good, but it's a Latin word which means form in the sense of shape.

If you want a word which goes with flora (plants) and fauna (animals) to mean "what is made", then facta might be a possibility as that Latin word does actually mean "made".

Solution 3:

Actually, you don't have to fabricate your own word. There already is one.

Mecha.

Mecha (alternatively: mech, mechs) is a science fiction genre, that centres around robots or machines. These machines vary greatly in size, shape and appearance. Some are little more than cars with arms and legs, while others are giant humanoid constructs.

The Japanese word for mech is "mecha" which is derived from the Japanese abbreviation meka (メカ?) for the English word "mechanical". In Japanese, mecha encompasses all mechanical objects, including cars, guns, computers, and other devices.

found that in Wikipedia.

The word is already in use in movies, anime, etc. It is the flora/fauna for robots and mechanical items.

Solution 4:

Automaton is a word usually used in today's world for abstract machines such as those in Computer Science whereas it did mean intelligent machines in Ancient Greek scriptures. SpeedyGonzales proved a point with his link.

Mecha is generally used for Human-controlled robots such as in Mobile Suit Gundam and Zone of the Enders. The two examples, you will note, are both of Japanese origins which proves the idea originated from there.

Machina is a word that is usually used when we refer to machines in general and seems to be the most apt form for a genus of robots.

Moreover, robots aren't necessarily supposed to be anthropomorphic. That is why the term android came about, to specifically mean machines with human like characteristics. Thus machina would be a more suitable word than automata.