Obregonia Frič (1925)

named after Alvaro Obregon, then President of Mexico
similar to Ariocarpus, flat, to 4.7 in (12 cm) Ø, gray green
tubercles similar to thick sharp-edged scales, the margins are downward bended, the lower side is keel-shaped
only 2–4 spines at the tip of the tubercle, later absent
flowers medium sized, wide opened, appears on the wooly center, white or light pink
fruits bald, white, opens at the base, seeds black

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Mexico - Tamaulipas
warm arid areas

Growth period

half shady and warm location
sensitive to too much moisture, keep the root neck dry
watering only if the soil is complete dryed

Winter period

bright and complete dry at about 50°F (10°C)


gravelly and pure minerally with addition of pumice, expanded slate, lava and quartz gravel
Obregonia denegrii Frič (1925)
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Tamaulipas - valley of Jaumave, San Vincente nerby of Ciudad Victoria
on limestone in the Chihuahuan Desert Vegetation


named after the then mexican Minister Deneger
broad globular to 4.7 in (12 cm) Ø, gray green to dark green
tubercles to 0.6 in (1.5 cm) long, at the base to 1 in (2.5 cm) Ø, thick, triangular,
upper side flat and lower side keel-shaped
areoles at the tip of the tubercle

2–4 spines, soft, later absent
flowers 1 in (2.5 cm) Ø, white, occasionally somewhat light pink
fruits bacciform, white

Flowering time

June–July in cultivation
5–6 years from seed


Ariocarpus denegrii (Frič) W. T. Marschall (1946)
Strombocactus denegrii
(Frič) G. D. Rowley (1974)
CITES Appendix II since 01.July 1975; Appendix I since 06.June 1981
Description of "Kakteen von A bis Z" by Walter Haage with courtesy by Kakteen-Haage made available.
Pictures 1 to 5 out of the collection of Donna and Robert Ellis; Tucson, Arizona