Ohio State University
Osu General Plant Biology: Herbaceous Roots and Stems
A concise, advanced level, review of structure and growth in these plant organs. Illustrations are clear and well labeled. This is an excellent tool for labs or exams.
Other
Cartage.org: Mature Root Cross Section
This thorough lesson provides a wealth of root related information ranging from the anatomy of a root to the different types of roots that exist. Many photos and drawings provide clarity to the text.
Ohio State University
Ohio State University: Woody Plants
This advanced level essay is a concise review of the structure of woody stems and roots. Good illustrations help make the text understandable.
Palomar Community College District
Palomar College: Stem & Root Anatomy
This is an advanced review from Palomar College of the types of cells that make up conducting tissue in stems and roots. The photos and diagrams are excellent!