Mammillaria petterssonii is a species of cactus in the genus Mammillaria, native to northeast and southwest Mexico. It has gained the Royal Horticultural Society's Award of Garden Merit.
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![MAMMILLARIA PETTERSONII 1239 Francisco Pomares ELDA [ALICANTE] Flickr](https://live.staticflickr.com/8535/8618169447_f41e8551ca.jpg)
Mammillaria petterssonii is a species of cactus in the genus Mammillaria, native to northeast and southwest Mexico. It has gained the Royal Horticultural Society's Award of Garden Merit.