The genus Thelocactus 

Thelocactus rinconensis ssp. nidulans
Sierra Paila, Coahuila
Photo: E. Nodari
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Thelocactus rinconensis ssp. nidulans
Sierra Paila, Coahuila
Photo: A. Mosco
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Thelocactus rinconensis ssp. nidulans
Sierra Paila, Coahuila
Photo: J. Jauernig
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Thelocactus rinconensis ssp. nidulans
Sierra Paila, Coahuila
Photo: J. Jauernig
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Thelocactus rinconensis ssp. nidulans
Sierra Paila, Coahuila
Photo: J. Jauernig
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Thelocactus rinconensis ssp. nidulans
Sierra Paila, Coahuila
Photo: J. Jauernig
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Thelocactus rinconensis ssp. nidulans
La Paloma, Coahuila
Photo: J. Jauernig
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Thelocactus rinconensis ssp. nidulans
La Paloma, Coahuila
Photo: J. Jauernig
enlarge

Thelocactus rinconensis ssp. nidulans
La Paloma, Coahuila
Photo: J. Jauernig
enlarge

Thelocactus rinconensis ssp. nidulans
La Paloma, Coahuila
Photo: J. Jauernig
enlarge

Thelocactus rinconensis ssp. nidulans
La Paloma, Coahuila
Photo: J. Jauernig
enlarge