Acanthocalycium

The minuta variety is distinguished by its long, robust spines and magnificent yellow flowers, though occasional orange or red blooms may occur.

Elegant white flowers tinged with violet. Beautiful!

Superb plant with a greyish body and very strong, long spines in brown-red to black tones. Bears a bright yellow flower that contrasts vividly against the dark, spiny form.

Small grey-green, glaucous body, new spines dark, later greyish, flower yellow.

Olive green body, straight rather thin ribs, litght pinkish flowers - nice variety!