Sulcorebutia pulchra

Sulcorebutias are known for their colorful flowers and S.pulchra is a good example of that. It is blooming while small plant, with flowers blood-red like the one pictured.
In culture Sulcorebutias are usually easy, but some species do tend to rot unexpectedly. Porous pure mineral substrate helps as usual.

Chamaelobivia 'Yellow bird'

Another Chamaelovia hybrid - yellow flowers this time. 'Yellow bird' is a bit shy bloomer, but flowers are nice and relatively large. 

Chamaelobivia hybrid 'Fire Chief'

This is old hybrid produces light-red flowers that are larger and lighter in color than with the species. Like all Chamaelobivias it is a free blooming and easy plant, suitable for beginner. Common cactus culture suits it well.

Mammillaria melaleuca

 Mammillaria melaleuca flowers are remarkably similar to M. sphaerica's. It has a very limited range, coming from Mexican state Tamailupas where much more widely distributed M.sphaerica grows as well. These two species are probably closely related. 

 Mammillaria melaleuca is relatively easy to grow plant, the largest one I have is about 10cm across and still singular. It's blooms usually form classical Mammillaria 'crown'.

Rebutia albopectinata

Here is another pic of this plant, one of my favorites. It is a R. heloisa relative with similar looking flowers, but a much larger plant. This clump I have produces flashes of hundred or so flowers couple times a season. 

Rebutia narvaecensis

Rebutia narvaecensis is a relatively recent discovery and a new favorite from that popular genus. The main attraction is of cause it's flowers of unusual light-pink color. 

As most Rebutias this is free-flowering genus that grows best with maximum light but does not like heat. For hot periods I move all Rebutias into shady area of my greenhouse.

Lobivia oligotricha

Lobivia oligotricha is a small plant with flattened stem and red to pink flowers. As most Libivias it is easy to grow and ready flowering plant.

The large variety of Lobivia forms is available nowadays for an interested collector, and the genus makes a good target for specialized collection. Generally easy plants with compact growth and bright flowers - old classic.