Ohio State University
Ohio State Univ.: Cell Expansion and Differentiation
This essay is complemented by useful illustrations of how plant cells enlarge after mitosis and become specialized for different functions. A good supplement to plant growth studies.
Ohio State University
Ohio State University: Anthophyta, Evolution & Diversity
An online summary of the evolution of flowering plants at an advanced level. The text is supported by good illustrations and is followed by a quiz. This is a good review for exams.
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!
Other
Cartage: Plant Structure and Growth
A comprehensive resource for information about plant structure to plant reproduction characteristics. Site covers broad topics on how plants function.