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Echinopsis spachiana grows as a columnar-formed cactus, reaching 2m high, with a diameter of 5 to 6cm. 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 large white tubular flowers appear in November to January and open at night.
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