Palomar Community College District
Palomar College: Diversity of Flowering Plants
The pictures in this essay from Palomar College are wonderful. The huge variety of flowering plants including some of the more unusual groups, is discussed at an advanced level.
Ohio State University
General Plant Biology: Plant Evolution
This is a solid review of basic principles of population genetics with an emphasis on plants. Use this to complement your units on evolution and plant biology. Take the quiz to check your understanding.