Hildewintera colademononis

Hildewintera colademononis, a photo by The Huntington Library on Flickr.

Crested cacti

Crested cacti, a photo by The Huntington Library on Flickr.

Award-Winning Echeveria

Award-Winning Echeveria, a photo by The Huntington Library on Flickr.

Haageocereus pseudomelanostele

Haageocereus pseudomelanostele, a photo by The Huntington Library on Flickr.

Hatiora epiphylloides bradei

Hatiora epiphylloides bradei, a photo by waarki on Flickr.

Aloe x haworthia 'Cosmo'

Aloe x haworthia 'Cosmo', a photo by Tralamander on Flickr.

Aloe x haworthia 'Cosmo'

Aloe x haworthia 'Cosmo', a photo by Tralamander on Flickr.

eager to bloom...

eager to bloom..., a photo by heinz41 on Flickr.

Cyphostemma uter

Cyphostemma uter, a photo by ktvamp on Flickr.

castilloniae

castilloniae, a photo by ktvamp on Flickr.

Cacti on lava rocks, next to mangroves... on Santa Cruz, Galapagos Islands, Ecuador

Cacti on lava rocks, next to mangroves... on Santa Cruz, Galapagos Islands, Ecuador, a photo by Dallas Krentzel on Flickr.

Sempervivum Pittonii

Sempervivum Pittonii, a photo by srboisvert on Flickr.

Aeonium Leucoblepharum

Aeonium Leucoblepharum, a photo by srboisvert on Flickr.

Gill Mills' Greenhouse - Dudleya gnoma

Gill Mills' Greenhouse - Dudleya gnoma, a photo by srboisvert on Flickr.

Anacampseros Alstonii

Birmingham Branch BCSS Open Greenhouse Day - Anacampseros, a photo by srboisvert on Flickr.