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Oreocereus (A. Berger) Riccobono (1909)

(Greek "oreios" = mountain; Latin "cereus" = waxy, candle)
mountain cereus

because of its occurrence in high elevation and the growth form

medium sized shrubs or low cluster, mostly strong hairy, without cephalium
flowers cylindrical, tubular, near the apex
fruits globular, yellow-green, opens at the base
seeds medium sized, dull black

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Distribution

South America - Peru, Bolivia, north Chile, north Argentina
steppe and mountains in 13,120 ft (4000 m) altitude and higher

Growth period

as many light as possible, full sun exposure
on daytime more than 59°F (15°C) and on nighttime colder at about 32°F (0°C)
slightly mist on evening for a constant moisture during the night
plenty ventilation is necessary, at stagnating heat and low air moisture the plants have only a poor growth
year-round are high temperatur differences between day and night required
because of the hairiness of the plants is a cultivation inside a greenhouse recommended
during the growth period plenty watering

Winter period

bright, dry and cold at ca. 41–46°F (5–8°C)

Soil-mixture

permeable to water with addition of crushed bricks and quartz gravel
with to many humus get the plants an unnatural growth
   
Oreocereus celsianus (Lemaire ex Salm-Dyck) Riccobono (1909)
 
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Habitat

Bolivia
Chuquisaca, Potosí, Tarija
Argentinia
Jujuy
puna vegetation in 9510–11,810 ft (2900–3600 m) altitude

Description

more than 9.9 ft (3 m) high, gray-green, mostly branching from the base, stems 3.1–7.8 in (8–20 cm) Ø
ribs 10–17, obtuse, around the areoles somewhat swollen, apex hairy
hairs to 2 in (5 cm) long, dense, straggly interwoven, at the apex rarely brownish
ca. 9 radial spines, to 0.8 in (2 cm) long
1–4 central spine, to 3.1 in (8 cm) long, stronger, different colored

flowers to 3.5 in (9 cm) long, dull pink
fruits globular

Synonyms

Pilocereus celsianus Lemaire ex Salm-Dyck (1850)
Cleistocactus celsianus
(Lemaire ex Salm-Dyck) F. A. C. Weber ex Roland-Gosselin (1904)
Cereus celsianus (Lemaire ex Salm-Dyck) A. Berger (1905)
Borzicactus celsianus (Lemaire ex Salm-Dyck) Kimnach (1960)

CITES

Appendix II
 
Description of "Kakteen von A bis Z" by Walter Haage with courtesy by Kakteen-Haage made available.

 

 

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