![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)
Category: Cacti
Cacti are essentially plants of the Western Hemisphere where they can be found from Canada to southern South America. They are exquisitely adapted to heat and drought. Learn more about them at Opuntia Web.
![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
![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
![Mammillaria heyderi gummifera, Zacatecas, MX](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2017/05/Mammillaria-heyderi-ssp.-gummifera-zacatecas-amantedar.jpg?resize=980%2C972&ssl=1)
Mammillaria heyderi
![Denmoza rhodocantha spines](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2014/12/denmoza-rhodacantha-spines.jpg?resize=980%2C683&ssl=1)
Denmoza rhodacantha
![Pelargonium](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2021/11/pelargonium.jpg?resize=612%2C920&ssl=1)
The Fynbos of South Africa
![Western Screech Owl](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2021/11/western-screech-owl-saguaro.jpg?resize=980%2C975&ssl=1)
Some Animals Use Cacti
![Neobuxbaumia tetetzo](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2017/05/neobuxbaumia-tetetzo-amantedar4.jpg?resize=980%2C900&ssl=1)
Neobuxbaumia tetetzo and its Nurse Plant
![Aloe capitata](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2023/12/aloe-capitata-amante-darmanin6.jpg?resize=980%2C900&ssl=1)
Aloe capitata
![Mammillaria pectinifera, Lourdes](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2017/05/mammillaria-pectinifera-lourdes.jpg?resize=980%2C980&ssl=1)
Serotiny in Mammillaria pectinifera
![Southern_long-nosed_bat](https://i0.wp.com/opuntiads.com/oblog/wp-content/uploads/2023/12/Southern_long-nosed_bat.jpg?resize=285%2C332&ssl=1)