Posted by
skopjecollection (SE europe(balkans) - Zone 6b) on Dec 9, 2019 2:21 PM concerning plant:
A small globular cactus, with thin, wavy ribs unique to the genus. Usually has 3 central spines, which are significantly thicker than the radial ones, placed in the upper half of the areole. They are arranged in a swordlike pattern, with a large, upright, significantly longer middle spine between 2 shorter ones (akin to the blade and crossguard). This is not the case when young (central spines could have a uniform length, or the middle one could be shorter), but as it ages it becomes more apparent. The radials are often plain white and short and lack any special features.
Flowers have a white to pinkish tint, with a magenta to purple central stripe.
The plant is slow growing, prefers sun to partial shade, and likes mineral soil and a winter rest.
Posted by
Baja_Costero (Baja California - Zone 11b) on May 13, 2020 8:59 PM concerning plant:
Low, near-globose green to yellow-green cactus with dozens of wavy ribs and purplish flowers. Plants may reach 3-5 inches wide, with 25-60 ribs and a highly variable number/color of spines (1-4 centrals to 2.5 inches long; 2-10 radials to 1 inch long). Imbricate scales cover the calyx.
From Zacatecas in north-central Mexico, south into Puebla and Oaxaca. Anderson describes this species as "extremely variable", "creating a taxonomic nightmare". Immature plants may be difficult to identify, especially based on the spines.
The genus name of this plant has been fluid over the years. At times it has been called Echinofossulcactus, at others Echinocactus. Stenocactus includes about 10 species with narrow, finlike ribs and asymmetrical distribution of large and small spines above and below the areole, respectively.
