Gasterias

Gasterias are the succulent genus that people the most mistakes with, including me, until I learned to keep them in my bathroom, completely out of the sun. In nature, they only grow in the shade and are succulents because they are adapted to survive in areas of low or infrequent rainfall. Gasteria are Alooids, meaning part of the larger aloe family. Here are a few of my indoor plants, which are also flowering happily. My outdoor gasterias never want to flower, for some reason.

Gasteria batesiana which has pleasantly warty leaves

Gasteria Doreeniae, which has smooth leaves and white spots in patterns

And many a mix of these elements of spots and tubercules

Most Gasteria are found in the Eastern Cape area of South Africa and there aren't many species although plant breeders have done a good job of mixing it all up and creating many hybrids

This one is actually an intergeneric hybrid, a mixture of Gasteria and Haworthiopsis, which are closely related enough to be interbred

And the ever-popular variegated forms, such as this Gasteria minima

Many people try and keep succulents indoors and are sad because they don't thrive. Gasteria are the ideal species, they are slow-growing, need only bright light but no direct sun and you can keep them in a well-draining mix and water them infrequently, about once a week, and they will happily thrive on neglect.