I sometimes refer to roots or leaves for my own personal notes, but in a general forum that might not be a good idea because even the root/leaf dichotomy is an assumption.
For general reference, I like to call the two sections "large plants" and "small plants" (with reference to the size of the drawings, not the plants themselves).
For general reference, I like to call the two sections "large plants" and "small plants" (with reference to the size of the drawings, not the plants themselves).