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Anchor text: Ariocarpus - living rocks of Mexico

Wikipedia: Ariocarpus

Anchor text: A Study of the Proposed Genus ''Roseocactus''

Wikipedia: Alwin Berger

Anchor text: Living Rocks of New Mexico

Wikipedia: John Merle Coulter

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Wikipedia: Ariocarpus fissuratus

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Wikipedia: Ariocarpus fissuratus

Anchor text: Ariocarpus retusus

Wikipedia: Ariocarpus retusus