Soehrensia formosa
Soehrensia formosa, is a species of Soehrensia, formerly included in the genus Echinopsis, found in South America. In north-western Argentina, Bolivia and northern Chile.
First published in Cactac.: Handb. Kakteenk. 3: 1678 in 1959.
Description
Soehrensia formosa grows solitary at first, later occasionally branching out from the base and then forming groups. The spherical to cylindrical, light green to blue-green shoots reach heights of growth of up to with a diameter of, making it the only cactus in South America with the "barrel cactus" habit. There are 27 to 50 rounded ribs that are clearly notched and tuberous. The dark areoles located on them are up to apart. Needle-like, yellowish to reddish-brown thorns emerge from them. The two to nine central spines are long. The nine to 15 radial spines are spread out, straight or slightly curved and have a length of up to.The broad, funnel-shaped, red to orange-red to yellow flowers appear near the top of the shoot and are open during the day. They are long and have the same diameter. The broad, spherical, green fruit are up to long and in diameter.