Free Tephrocactus book
Free Tephrocactus book
If you haven't checked the Cactuspro digital library recently it's time you did. There's been a much slower release of new titles and most of these are ancient things that are out of copyright but there are some good ones amongst them. A few authors have agreed to allow newer books (still within copyright) to be placed there, including Michael Kießling's book on the smaller Opuntia - Tephrocactus und andere Feigenkakteen - which has appeared within the last few days.