| Echinopsis [2-WWW] | Echinopsis | Siewki. liczne Astrophytum. Ariocarpus. | The source often gives neither species nor clone. All Echinopsis should not be equated with E. oxygona. | [Biuletyn PTMK, Oddział we Wrocławiu 1989, file p. 5, 6, 7, 8] |
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| Echinopsis oxygona [2-WWW] | Echinopsis eyriesii | Rootstock for multiplying stems. | WCVP uses E. oxygona. There is no universal durability or minimum overwintering temperature. | [Modrakowski 2005, file p. 46] |
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| Echinopsis spachiana [2-WWW] | Trichocereus spachianus | A more vigorous rootstock for A. myriostigma and A. ornatum. | Obecnie Echinopsis spachiana. | [Wery 1989, file p. 8] |
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| Echinopsis lageniformis [2-WWW] | Trichocereus bridgesii | Columnar rootstock in Wery's account. | Obecnie Echinopsis lageniformis. | [Wery 1989, file p. 8] |
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| × Harrisinopsis jusbertii [2-WWW] | Eriocereus jusbertii | Astrophytum, Copiapoa and other scions. | WCVP labels × Harrisinopsis jusbertii as Artificial Hybrid. Retain the hybrid sign. | [Wery 1989, file p. 8] |
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| Cleistocactus samaipatanus [2-WWW] | Cleistocactus samaipatanus | Szczepienie ratunkowe brodawki M. carmeniae. | A documented single case, not general compatibility. | [Wolf 2009, file p. 1, 2] |
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| Pereskiopsis [2-WWW] | Pereskiopsis | Accelerating seedling growth and propagation. | The species is unspecified. Do not automatically assign P. diguetii. | [Kaktusy i Inne 2005a, file p. 57] |
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| Myrtillocactus geometrizans [2-WWW] | Myrtillocactus geometrizans | Rootstock for multiplying stems in warm cultivation. | No minimum has been established. Do not apply the scion's frost-hardiness list to this rootstock. | [Modrakowski 2005, file p. 46] |
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| Selenicereus [2-WWW] | Selenicereus | Rootstock for rapid multiplication. | The source gives the genus without a species. | [Modrakowski 2005, file p. 46] |
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| Leucostele atacamensis subsp. pasacana [2-WWW] | Trichocereus pasacana | A more durable rootstock for selected cool-growing scions. | The author mentions a brief −3°C but does not allow overwintering around 0°C for many months. Do not treat the figure as a guaranteed threshold. | [Modrakowski 2005, file p. 46] |
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| Leucostele terscheckii [2-WWW] | Trichocereus terscheckii | A more durable rootstock for selected cool-growing scions. | The author mentions a brief −3°C but does not allow overwintering around 0°C for many months. Do not treat the figure as a guaranteed threshold. | [Modrakowski 2005, file p. 46] |
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| Echinopsis schickendantzii [2-WWW] | Trichocereus schickendantzii | A more durable rootstock for selected cool-growing scions. | The author mentions a brief −3°C but does not allow overwintering around 0°C for many months. Do not treat the figure as a guaranteed threshold. | [Modrakowski 2005, file p. 46] |
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| Opuntia humifusa [2-WWW] | Opuntia humifusa | A potential rootstock for cacti that tolerate cold. | Compatibility between the scion, rootstock clone and conditions is necessary. Opinions on durability are not the result of a uniform test. | [Modrakowski 2005, file p. 46, 47] |
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| Opuntia camanchica [2-WWW] | Opuntia phaeacantha var. camanchica | A potential rootstock for cacti that tolerate cold. | Compatibility between the scion, rootstock clone and conditions is necessary. Opinions on durability are not the result of a uniform test. | [Modrakowski 2005, file p. 46, 47] |
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| Opuntia fragilis [2-WWW] | Opuntia fragilis | A potential rootstock for cacti that tolerate cold. | Compatibility between the scion, rootstock clone and conditions is necessary. Opinions on durability are not the result of a uniform test. | [Modrakowski 2005, file p. 46, 47] |
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| Echinocereus viridiflorus [2-WWW] | Echinocereus viridiflorus | A potential rootstock for cacti that tolerate cold. | Compatibility between the scion, rootstock clone and conditions is necessary. Opinions on durability are not the result of a uniform test. | [Modrakowski 2005, file p. 46, 47] |
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| Echinocereus reichenbachii subsp. baileyi [2-WWW] | Echinocereus baileyi | A potential rootstock for cacti that tolerate cold. | Compatibility between the scion, rootstock clone and conditions is necessary. Opinions on durability are not the result of a uniform test. | [Modrakowski 2005, file p. 46, 47] |
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| Echinocereus triglochidiatus [2-WWW] | Echinocereus triglochidiatus | A potential rootstock for cacti that tolerate cold. | Compatibility between the scion, rootstock clone and conditions is necessary. Opinions on durability are not the result of a uniform test. | [Modrakowski 2005, file p. 46, 47] |
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| Echinocereus enneacanthus [2-WWW] | Echinocereus enneacanthus | A potential rootstock for cacti that tolerate cold. | Compatibility between the scion, rootstock clone and conditions is necessary. Opinions on durability are not the result of a uniform test. | [Modrakowski 2005, file p. 46, 47] |
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