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Oreocereus celsianus

Oreocereus celsianus, Photo: Michael Lahanas

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Ordo: Caryophyllales

Familia: Cactaceae
Subfamilia: Cactoideae
Tribus: Cereeae
Subtribus: Trichocereinae
Genus: Oreocereus
Species: Oreocereus celsianus
Name

Oreocereus celsianus (Salm-Dyck) Riccob., 1909.
Synonyms

Homotypic
Pilocereus celsianus Lem. ex Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 185-186. 1850 syn. sec. Kiesling & al. 2014
Cereus celsianus (Lem. ex Salm-Dyck) Orcutt in W. Amer. Sci. 13: 63. 1902 syn. sec. Kiesling & al. 2014
Cleistocactus celsianus (Lem. ex Salm-Dyck) F.A.C.Weber in Roland-Gosselin, Cleistocactus: 16. 1904 syn. sec. Kiesling & al. 2014
Cereus celsianus (Lem. ex Salm-Dyck) A.Berger in Rep. (Annual) Missouri Bot. Gard. 16: 64. 1905 syn. sec. Kew WCVP (2019)
Borzicactus celsianus (Lem. ex Salm-Dyck) Kimnach in Cact. Succ. J. (Los Angeles) 32: 59. 1960 syn. sec. Kiesling & al. 2014
Echinopsis celsiana (Lem. ex Salm-Dyck) Anceschi & Magli in Cactusinhabitat S. Amer. 2011/2013: 38. 2013 syn. sec. Kiesling & al. 2014
Heterotypic
Pilocereus williamsii Scheidw. ex C.F.Först., Handb. Cacteenk.: 354. 1846 syn. sec. Korotkova 2021
Pilocereus foveolatus Labour. ex Lem. in Rev. Hort. (Paris) sér. 4, 4: 428. 1862 syn. sec. Kew WCVP (2019)
Pilocereus celsianus var. foveolatus (Labour. ex Lem.) Schelle, Handb. Kakteenkult.: 101. 1907 syn. sec. Kew WCVP (2019)
Pilocereus williamsii Lem. in Rev. Hort. 1862: 428. 1862 syn. sec. Kew WCVP (2019)
Pilocereus celsianus var. williamsii (Lem.) K.Schum., Gesamtbeschr. Kakt.: 180. 1897 syn. sec. Kew WCVP (2019)
Pilocereus kanzleri J.N.Haage ex Rümpler, Handb. Cacteenk., ed. 2: 671. 1885 syn. sec. Kew WCVP (2019)
Pilocereus bruennowii J.N.Haage ex Rümpler, Handb. Cacteenk., ed. 2, 2(16): 651, f. 86. 1886 syn. sec. Kiesling & al. 2014
Oreocereus bruennowii (J.N.Haage ex Rümpler) Backeb., Kaktus-ABC: 187. 1936 ["1935"] syn. sec. Kiesling & al. 2014
Oreocereus celsianus var. bruennowii (J.N.Haage ex Rümpler) Borg, Cacti, ed. 2: 154. 1951 syn. sec. Kiesling & al. 2014
Pilocereus brunnowii F.Haage ex Nichols., Ill. Dict. Gard. 3: 127. 1886 syn. sec. Korotkova 2021
Cereus bruennowii (J.N.Haage ex Rümpler) Mottet, Dict. Prat. Hort. 1: 581. 1892–1893 syn. sec. Kew WCVP (2019)
Pilocereus celsianus var. bruennowii (J.N.Haage ex Rümpler) K.Schum., Gesamtbeschr. Kakt.: 180. 1897 syn. sec. Kew WCVP (2019)
Pilocereus brunnovianus Moerder in Rev. Hort. 67: 451. 1895 syn. sec. Kew WCVP (2019)
Pilocereus brunnowianus Moerder in Rev. Hort. (Paris) 67: 451. 1895 syn. sec. Kew WCVP (2019)
Pilocereus celsianus f. auratus K.Schum., Gesamtbeschr. Kakt.: 180. 1897 syn. sec. Kew WCVP (2019)
Pilocereus celsianus var. gracilior K.Schum., Gesamtbeschr. Kakt.: 180. 1897 syn. sec. Kew WCVP (2019)
Oreocereus fossulatus var. gracilior (K.Schum.) Backeb., Cactaceae 2: 1032. 1959 syn. sec. Kew WCVP (2019)
Pilocereus celsianus var. lanuginosior Salm-Dyck ex K.Schum., Gesamtbeschr. Kakt.: 180. 1897 syn. sec. Kew WCVP (2019)
Oreocereus celsianus var. lanuginosior Salm-Dyck ex Riccob. in Boll. Reale Orto Bot. Palermo 8: 260. 1909 syn. sec. Kew WCVP (2019)
Oreocereus fossulatus var. lanuginosior (Salm-Dyck ex K.Schum.) W.T.Marshall in Marshall & Bock, Cactaceae: 105. 1941 syn. sec. Kew WCVP (2019)
Cereus fossulatus Backeb. in Kakteen-Freund 2(1): 4. 1933 syn. sec. Kew WCVP (2019)
Oreocereus maximus Backeb. in Desert Pl. Life 21: 8. 1949 syn. sec. Kiesling & al. 2014
Oreocereus neocelsianus Backeb. in Desert Pl. Life 21: 6. 1949 syn. sec. Kiesling & al. 2014
Oreocereus fossulatus var. rubrispinus F.Ritter, Kakteen Südamerika 2: 697. 1980 syn. sec. Kew WCVP (2019)
Oreocereus neocelsianus var. ruficeps Y.Itô, Cact. Class. Ill: 179. 1981 syn. sec. Kiesling & al. 2014
Oreocereus neocelsianus var. villosissimus Y.Itô, Cactaceae: 178. 1981, nom. inval., syn. sec. Kew WCVP (2019)

Distribution
Native distribution areas:

Continental: Southern America
Regional: Western South America
: S-Bolivia; Argentina (Jujuy); Peru

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
References
Primary references

Riccobono 1909. Boll. Reale Orto Bot. Palermo 8: 259.

Additional references

Anderson, E.F. 2001. The Cactus Family. (Timber Press) ISBN 0-88192-498-9.
Hunt, D., Taylor, N. & Charles, G. (ed.) 2006. The New Cactus Lexicon. Milborne Port. ISBN 0-9538134-4-4.

Links

International Plant Names Index. 2021. Oreocereus celsianus. Published online. Accessed: Nov 03 2021.
Tropicos.org 2021. Oreocereus celsianus. Missouri Botanical Garden. Published online. Accessed: 03 Nov 2021.
Govaerts, R. et al. 2021. Oreocereus celsianus in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2021 Nov 03. Reference page.
Korotkova, N. et al. 2021. Oreocereus celsianus in Cactaceae at Caryophyllales.org. A global synthesis of species diversity in the angiosperm order Caryophyllales. Published online. Accessed: 2021 Nov 03. Reference page.

Vernacular names
English: Old man of the Andes

Oreocereus celsianus, or the "old man of the mountain" is a member of the family Cactaceae native to the high lands of the Andes in South America, and is named for its fluffy white hair, which may protect it from intense sunlight and extreme temperatures.
C
Distribution

Oreocereus celsianus occurs naturally at high altitudes across Argentina, Bolivia and Peru.
Description

Growing to around 3 metres (10 ft) tall, O. celsianus is covered in a downy white hair, with greatest density at the tips of stems receding to near-bare at the base. The ribbed body has many long, brown spines and blooms in spring with long, tubular red flowers.
Ecology

Pollinated by hummingbirds in spring.
Cultivation

Thrives at 10–12 °C (50–54 °F), with a frost-tolerance of down to −12 °C (10 °F) and requiring protection from hot sunlight. Prefers full sun and light watering. Propagates from seed.
Oreorcereus celsianus in pot
References

"The Plant List: A Working List of All Plant Species".

Huntington Botanical Gardens
Desert Gardening

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