Parodia tenuicylindrica
Parodia tenuicylindrica is a species of cactus from the genus "Parodia". The small green cacti have yellow and red-brown spines, white wool and yellow flowers. They produce yellow-green fruit, and black seeds. "P. tenuicylindrica" can be found growing individually in Rio Grande do Sul, Brazil. Taxonomy. The species was originally described as "Notocactus minimus" by Frič & Kruizinger in 1940, based on a description by Bruining. It was later described as "Notocactus tenuicylindricus" by Friedrich Ritter. Despite objections from hobbyists (among whom "Notocactus" species were popular) "Notocactus" (and others) were synonymised under "Parodia". In 1997, based on  Ritter's earlier description, D. R. Hunt classified the species as "Parodia tenuicylindrica". Description. "P. tenuicylindrica" are cylindrical cacti which are green to blue-green. In height, they are and are from in width. The plants have 13-21 notched and tuberculate ribs. On top of the tubercles, there are areoles with white wool. The species has straight and stout spines; the radial spines, of which there are between ten and fifteen, are pale yellow, and between in length, while the 2-4 red-brown central spines are between long. The species produces lemon yellow flowers (which are up to  long) and greenish-yellow fruits. The seeds are black oblongs with tubercles. Distribution. "P. tenuicylindrica" can be found growing solitarily in Rio Grande do Sul, Brazil. It is currently classified as Endangered (EN) on the IUCN Red List, with major threats reported to be fires, cattle grazing due to trampling, agriculture, and forestry.