Denmoza is a genus of cactus found in Argentina, comprised of only 2 species. The name of the genus is an anagram of the western province of Mendoza. These species grow slowly and stay globulous during a long period before becoming shortly column-shaped, 0.5 to 1.5 cm high. The plant's diameter varies from 15 to 30 cm.
Trunk color varies from pale green to dark green, dotted with 15 to 30 ribs. Flowers are zygomorphous, of a maximum length of 7.5 cm, ruddish in color and have white hair on the tube. The flower open sufficiently widely so that the stigma and stamen are visible from outside. The fruit is spherical, of about 2.5 cm in diameter, and pale green. They are sometimes also reddish and split at maturity.
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