On the Missouri Botanical Garden FB page, of which Peter Raven is still the head, I recently posted:
At the budding open, free, 'edit this page' World University & School, - like Wikipedia with MIT Open Course Ware - WUaS recently added a 'Plant Evolution' subject - worlduniversity.wikia.com/wiki/Plant_Evolution
- and Peter Raven's, et al. "Biology of Plants" text book - both the printed 6th ed., and the online 7th ed. Thanks for these resources :) Invitation to Teach,
Add and Learn at the WIKI University and School. Check out the FREE Harvard Ph.D. in Education.
I took a course at Reed using this text decades ago :)
(http://scott-macleod.blogspot.com/2010/04/extinct-mosses-and-liverworts-world.html - April 5, 2010)