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There is about 100 taxa of Echinocereus. The different species have a large range of colors from green to yellow, pink, orange, and red.
As is often the case in cactus genera, the bigger species will take full sun while the smaller species like some shade.
They form clumps of deeply divided, spiny leaves, which are gray-green above and fuzzy-white beneath. They produce round, compact heads of tiny pale blue or grayish-white flowers, resembling thistles, atop gray-white stems in late summer. Globe Thistles can live in any well-drained soil as long as it isn't too rich. They will survive in poor, dry soil. They should be in a position with full sun. These plants can be increased by seeds or division in the fall, or by root cuttings in the winter. Varietes: E. Ritro, E. Bannaticus, E. Gmelinii and E. Sphaerocephalus.
Echinopsis candicans is a clump-forming cactus that resembles the 'Torch Cactus' but not as tall and does not stand as straight. The large white areoles produce brownish yellow spines, the central spines being up to 10 cm (3.9 in) long, the radial spines only up to 4 cm (1.6 in).
The fragrant white flowers open at night.
The 128 species range from large and treelike types to small globose cacti.
It is a columnar, branching cactus that can grow over 7.6 metres (25 ft) tall. Profuse, white flowers gather along the stems on warm summer nights, and are present for most of the following day.
USDA minimum zone: 8