Thelocactus hexaedrophorus

Origin: San Luis Potosi, Tamaulipas, Nuevo Leon and Zacatecas - Mexico
Form: Solitary, very variable.
Flower: White to pinkish.
Min. temp.: -7°C, keep dry in winter.

Mammillaria karwinskiana ssp. karwinskiana

Origin: Mexico - Oaxaca, Morelos, Michoacan, Puebla, Michoacan.
Form: Clumping, dichotomously dividing; heads to 10cm high and broad.
Flower: Yellow with purplish mid-veins; 1.5cm across; june-july.
Min. temp.: -4°C, if kept dry.

Parodia mammullosa ssp. submammullosa

Easy to grow Parodia with beautifull yellow flower with a red stigma. This one is from the Netherlands cactus mix.

Gymnocalycium baldianum - red

Youngsters

Gymnocalycium baldianum - pink

Gymnocalycium baldianum - white flower

Astrophytum capricorne