Cleistocactus micropetalus f Ritter 1980

Plants shrubby, branching basally and somewhat spreading, 1.5-3 m (4.9-9.8 ft) high. Stems gray-green, 6-8 cm (2.4-3.1 in) in diameter. Ribs 16-18, wavy. Areoles close set. Spines

Cleistocactus luribayensis

Cleistocactus pachycl adus 159

golden yellow, straight. Central spine one, sometimes more, stout, needle-like, 20-40 mm (0.8-1.6 in) long. Radial spines 5-6,5-15 mm (0.2-0.6 in) long. Flowers often produced in large numbers near the stem tips, open at night, radially symmetrical, green, to 2.2 cm (0.9 in) long. Fruits globose,yellow to reddish yellow, 1.5-2 cm (0.6-0.8 in) in diameter. Distribution: Concepción, Beni, Bolivia.

Cleistocactus morawetzianus Backeberg 1936 Cleistocactus morawetzianus var. pycnacanthus Rauh & Backeberg

1956, C. pycnacanthus (Rauh & Backeberg) Backeberg 1966 Cleistocactus apurimacensis H. Johnson ex Backeberg 1966 Cleistocactus luminosus H. Johnson ex Backeberg 1966 Cleistocactus villaazulensls F. Ritter 1981

Plants shrubby to nearly treelike, much branched, to 2 m (6.6 ft) high. Stems gray-green, to 5 cm (2 in) in diameter. Ribs 1214 with transverse notches. Areoles to 10 mm (0.4 in) apart. Spines golden yellow, becoming grayish white with dark tips, thickened basally. Central spines usually 3, awl shaped, to 50 mm (2 in) long. Radial spines to 14, to 15 mm (0.6 in) long. Flowers straight or slightly curved above the pericarpels, white or tinged pale greenish or pinkish, to 5.5 cm (2.2 in) long and 0.9 cm (0.4 in) in diameter; perianth parts spreading; styles long-exserted. Distribution: central Peru.

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