Mammillaria sinforosensis var. cobrensis f. rubriflora

Mammillaria sinforosensis var. cobrensis f. rubriflora

Mammillaria sinforosensis var. cobrensis f. rubriflora 2nd July 2011
Photographed at Chester Zoo.

I'm afaid I laughed when I saw it. No matter, it does
have a jolly impressive name.