Фотография: http://atomic-plant.de
Фотография: Sylvain Burgaud
Источники:
http://atomic-plant.de/bilder/Conos/C%20lithops%20Kangnas.html
https://www.flickr.com/photos/14732695@N06/44013876944/
https://www.flickr.com/photos/14732695@N06/43901233344/
Продажа семян: