Other
Hamilton College: Plant Kingdom Spore Producers
A solid overview of the few plants that reproduce by spore production. Includes examples and an explanation of the early evolution of these plants.
University of Hawai'i
University of Hawaii: Bryophyte Reproductive Cycle
An explanation of the plants that reproduce by the production of spores. Includes extensive graphics.
BiologyWise
Biology Wise: Asexual Reproduction in Plants
Explains the different ways that asexual reproduction can take place in plants.