It's called chlorophyll, It's the unique substance that is found in all plant life. This is the pigment that gives plant their characteristic green colour.
What Is The Green Stuff In Plants Called?
Algae
Fishy feet
The green stuff as you call it is chloroform.
It's called chlorophyll. Weird spelling, huh? Chlorophyll is a pigment that makes plants green. Just like our pigments make our hair and eyes colors.