About Soehrensia strigosa (Salm-Dyck) Schlumpb.
Soehrensia strigosa is a shrubby cactus that branches from its base and forms dense clumps up to 1 meter across. Its cylindrical shoots are either erect or ascending, reaching 5 to 6 centimeters in diameter and up to 60 centimeters in length. This species has 15 to 18 very low, blunt ribs. Large, circular areoles sit on these ribs; they are initially white and spaced up to 0.8 centimeters apart. Numerous fine, needle-like thorns emerge from the areoles, with colors ranging from whitish to yellowish to reddish-brown, and occasionally they have darker tips. There are approximately four central spines, which grow up to 7 centimeters long, while nine to 16 slightly shorter radial spines are also present. The species produces funnel-shaped white flowers that open at dusk and remain open through most of the following day. These flowers can reach up to 20 centimeters long and 15 centimeters in diameter. The resulting fruits are spherical, fleshy, yellow to orange, and measure 4 to 6.5 centimeters in length. Soehrensia strigosa is widespread in lower-altitude montane vegetation in the Argentine provinces of Salta, Tucumán, Catamarca, La Rioja, San Juan, and Mendoza, growing between 700 and 2000 meters above sea level.
