![Sclerocactus johnsonii, Nancy Hussey](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2015/01/sclerocactus-johnsonii-nh6.jpg?resize=980%2C980&ssl=1)
![Sclerocactus johnsonii, Nancy Hussey](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2015/01/sclerocactus-johnsonii-nh6.jpg?resize=980%2C980&ssl=1)
![Coryphantha octacantha, in habitat](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2015/02/Coryphantha-octacantha2ad-e1428011517480.jpg?resize=980%2C535&ssl=1)
Coryphantha octacantha
![Corynopuntia clavata, Jerry Friedman](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2017/04/Grusonia_clavata.jpg-JerryFriedman.jpg?resize=980%2C800&ssl=1)
Corynopuntia (Grusonia) clavata
![Plate by Mary Emily Eaton](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2020/11/volume-3-xix.jpg?resize=980%2C980&ssl=1)
The Cactaceae, Britton and Rose
![Mammillaria albata, Amante Darmanin](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2015/01/mammillaria-albata-ad7.jpg?resize=980%2C900&ssl=1)
Mammillaria geminispina/albata
![Opuntia, Patrick Denker](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2015/03/opuntia-patrick-denker1.png?resize=980%2C567&ssl=1)
Cliffs and Canyons
![Tephrocactus molinensis](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2015/02/tephrocactus-molinensis-DSC07738.jpg?resize=980%2C833&ssl=1)
Tephrocactus
![Sansevieria sp., Gregoruiz](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2017/04/sansevieria-sp-gregoruiz-e1491571988486.jpg?resize=980%2C729&ssl=1)
Sansevieria: a Plant for Shade and Drought
![Opuntia sulphurea, Sebastian Santecchia](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2014/12/opuntia-sulphurea-spinibarbis-Sebastian-Santecchiadb.jpg?resize=980%2C488&ssl=1)
Opuntia sulphurea and Sebastian Santecchia
![Delosperma 'oberg', Bahamut Chao](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2015/01/delosperma-oberg-bahamut-chao.jpg?resize=640%2C425&ssl=1)
Delosperma Has Obvious Seeds
![Aloe hereroensis](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2023/12/Aloe-hereroensis.jpeg?resize=980%2C980&ssl=1)
Aloes, A Pictorial
![Opuntia atrispina](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2022/11/opuntia-atrispina-rock-springs-tx-ben-udall3.jpg?resize=720%2C960&ssl=1)