https://oregoncactus.blogspot.com/2015/07/x-gasteraloe-royal-highness.html
Oregon Cactus Blog: x Gasteraloe 'Royal Highness'
No one seems to know who created this cross, but it's a classic. It's an intergeneric cross between an Aloe and a Gasteria, probably Aloe ...
blog xoregoncactusgasteraloeroyal