Robotots usually move, but a robot plant moves like a plant. It may turn slowly towards the sun, or it may be still. However it breathes, in captures energy, and it produces. It is alive.
Smart solutions from the plant kingdom - researchgate
The concept was first scientifically published in 2010 (although models of comparable systems controlled by neural networks date back to 2003) and has so far remained largely theoretical.
A plantoid is a hypothetical robot or synthetic organism designed to look, act and grow like a plant.
An example of a plantoid in active research was demonstrated by Dr Mazzolai of the Italian Institute of Technology, in Pontedera plans during a conference at the Natural History Museum in London on July 29th 2013.
When looking at a garden, meadow or forest, that half of almost every plant in it is underground.