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Thelocactus rinconensis ssp. hintonii Luethy, Kakt. and. Sukk. 48: 39 (1997).
Holotype: Road from Cienega del Toro to Santa Rosa on a gypsum hill, Municipio Galeana, Nuevo León, Mexico, 1610 m, 3 October 1995, Hinton et al. 25762 (Herbarium G.B. Hinton).
Description
Stem single, depressed or globose, up to 20 cm wide. Ribs 24, distinct. Tubercles conical. Areoles without glands. Central spines 3-4, 50 mm long, ochre to greyish, slightly curved, acicular. Radial spines 0-6, 15 mm long, ochre to greyish, slightly curved, acicular. Flowers 45 mm wide, yellow to pinkish.
Distribution
Mexico, Nuevo León, known only from a small area west of Rayones, occurring in matorral xerofilo on limestone hills.
Comments
This is the last subspecies of the rinconensis complex to have been described. It comes from the area of Rayones and has a spination similar to that of ssp. freudenbergeri and yellowish flowers.
Thelocactus rinconensis ssp. hintonii
Santa Rosa, Nuevo León
Photo: G. Jantschgi
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Thelocactus rinconensis ssp. hintonii
Santa Rosa, Nuevo León
Photo: G. Jantschgi
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Thelocactus rinconensis ssp. hintonii
Santa Rosa, Nuevo León
Photo: G. Hinton
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Thelocactus rinconensis ssp. hintonii
Santa Rosa, Nuevo León
Photo: G. Hinton
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