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Carnegiea Britton & Rose (1908)

named after Andrew Carnegie (1835-1919)
Scottish-born US-American industrialist,
philanthropist and founder of the Carnegie Institution of Washington

giant columar cacti, over 12 m (39 ft) tall, 30–65 cm (11–25 in) Ø, few branches
appear only in a few meters (foot) height, sometimes as crest
ribes 12–24; areolae brown; center spines up to 7 cm (2.8 in)
longand stronger, spines at the floral region shorter and stronger
flowers numerous, abaout 12 cm (4.7 in) long, white

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Distribution

USA - south Arizona, southeast California, west of Colorado River
Mexico - Sonora, Sonora Desert
warm steppes, in 180 to 1350 m (590–4429 ft) altitude

Growth period

sunny, preferably outdoor, very warm location
this species is sensitive to moisture, thus pour little

Winter period

cool, dry and sunny at 5–12°C (41–53°F)

Soil-mixture

minerally, well-drained, with drainage layer at the bottom of the pot
   
Carnegiea gigantea (G. Engelmann) Britton & Rose (1908)
 
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Habitat

USA
south Arizona, southeast California, west of Colorado River
Mexico
Sonora, Sonora Desert
warm steppes, in 180 to 1350 m (590–4429 ft) altitude

Description

gicantic Carnegiea
over 12 m (39 ft) tall, 30–65 cm (11–25 in) Ø, with branches
ribs 12–24, blunt
areoles brown; 12 and more radial spines, 1–2 cm (0.4–0.8 in) long, radially arranged
3–6 center spines, up to 7 cm (2.8 in) long, stronger, spines in floral region is shorter and finer

flower 12 cm (4.7 in) long, white
fruit red inside and outside

Comment

Common name: Saguaro; national flower of Arizona
the biggest population of this species, is in the
Saguaro National Park in Arizona, USA

Synonyms

Cereus giganteus G. Engelmann (1848)
Pilocereus
giganteus (G. Engelmann) T. Ruempler (1885)
CITES Appendix II
 
Description of "Kakteen von A bis Z" by Walter Haage with courtesy by Kakteen-Haage made available.

 

 

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