Фотография: http://atomic-plant.de
Фотография: Sylvain Burgaud
Фотография: Matunai illustrated succulents
Источники:
http://atomic-plant.de/bilder/Conos/C%20pell%20Goegap.html
https://www.flickr.com/photos/14732695@N06/29788636297/
https://www.flickr.com/photos/14732695@N06/30854821948/
https://www.flickr.com/photos/14732695@N06/21173653073/
https://matunaisucculents.storeinfo.jp/posts/2766424?categoryIds=441995
Продажа семян: