Thelocactus rinconensis is a small perennial gray-green cactus, growing 6 - 8 centimeters high and is between 12 - 20 centimeters in diameter. It has 20-25 ribs with marked with angular tubercles. The areolas are 2 to 2.5 centimeters apart, circular or elliptical and covered with white wooly hairs. Areoles have 3 to 4 central spines are 6 - 8 centimeters long It features up to six dark brown to black main spines and thin, radial spines that are 1.3-1.5 cm long. Flowers, about 4 cm long and 2.5-7.5 cm wide, are funnel-shaped and yellow or whitish, growing from new growth at the top of the plant. Fruits are spherical to oblong with scales, 7-9 mm in diameter, greenish or yellowish. Seeds are 1.7-2 mm long[3]
Pink flower cultivar
White flower plant
Distribution
The plant is found in the Chihuahuan Desert of Coahuila and Nuevo Leon, Mexico growing at elevations of 1200-1900 meters growing in xerophytic shrubland on calcareous soils.[4]
↑ "Thelocactus rinconensis". LLIFLE. 2013-08-04. Retrieved 2024-05-09.This article incorporates textfrom this source, which is available under the CC BY-SA 3.0 license.
↑ Dietrich, Albert; Otto, Friedrich (1855). "Allgemeine Gartenzeitung". Biodiversity Heritage Library. Retrieved 2024-05-09.This article incorporates textfrom this source, which is available under the CC BY-SA 3.0 license.
↑ Britton, Nathaniel Lord; Eaton, Mary E.; Rose, J. N.; Wood, Helen Adelaide (1919). The Cactaceae: descriptions and illustrations of plants of the cactus family. Washington: Carnegie Institution of Washington. doi:10.5962/bhl.title.46288.
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