Melocactus azureus v. ferreophilus Cactus The flowers are just a

The flowers are just a few millimeters wide but it flowers regularly during the warmer months unlike a lot of the showier Stapeliads that bloom once a year or so

Produces big yellow flowers with a purple stigma

Tacitus bellus  AKA Graptopetalum bellum

Produces big yellow flowers in summer

the clump itself stays pretty small

Melocactus azureus v. ferreophilus Cactus The flowers are just aMelocactus azureus var. ferreophilus This is a nice cephallium forming species with green to blue green skin. It looks and grows like normal cactus several years but once it gets big enough the main plant stops growing but produces a large hairy inflorescence that continues to grow for the rest of the life of the plant. Eventually the inflorescence can be taller than the plant itself. This is more tropical than most succulents so it doesn't like cold