Appearance
"Trichocereus spachianus" grows as a cactus with a columnar habit, reaching 2 m high, with a diameter of 5–6 cm. Vertical branches arise from the base of the plant. Each column has 10–15 rounded ribs. The large areoles are around 1 cm apart, and have wavy yellow hairs. The straight spines are red-yellow initially, fading to white as they age. The central spine is around 1–2 cm long, and is surrounded by 8 to 10 smaller radial spines that are 0.4–1 cm in length. The white flowers are 15 cm across and 18–20 cm long, part of which is an 8 cm long tube. In their native habitat, the flowers appear in June–July and open at night.
Distribution
"Trichocereus spachianus" is native to western Argentina. It is a declared weed in South Africa.References:
Some text fragments are auto parsed from Wikipedia.