Echinopsis tarijensis

Scientific Name: Echinopsis tarijensis (Vaupel) Friedrich & G.D.Rowley
Synonym: Cereus tarijensis, Echinopsis narvaecensis, Helianthocereus narvaecensis, Helianthocereus tarijensis, Trichocereus narvaecensis, Trichocereus tarijensis
Family: Cactaceae

Origin: Argentina, Bolivia

Growth Habits: Columnar cactus, solitary at first, then branching from the side, dark green stems, up to 18 feet tall (5 m), 8 to 14 inches in diameter (20-35 cm); about 15 ribs; large, close set areoles with gray felt; 3 to 4 centrals, up to 3 inches long (7.5 cm); many radials, 20 or more, up to 1.6 inches long (4 cm)

Blooming Habits:
Reddish purple diurnal flowers, near the stem tips, in summer, 4 to 4.8 inches long (10-12 cm). The fruit is ovoid, 1.4 to 2 inches long (3.5-5 cm), 0.8 to 1.2 inches in diameter (2-3 cm)