© Robert Siegel
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Cactus

Order: Caryophyllales
Family: Cactaceae

Species on page

+ Hedgehog cactus (Echinopsis)
+ California barrel cactus (Ferocactus cylindraceus)
+ Beavertail cactus (Opuntia basilaris)
+ Golden barrel cactus (Echinocactus grusonii)
+ Mexican giant cactus (Pachycereus pringlei )
+ Lava cactus (Brachycereus nesioticus)
+ Silver torch or wooly torch (Cleistocactus strausii) - separate page
+ Cholla (Cylindropuntia)
+ Tree cholla (Cylindropuntia imbricata)
+ Prickly pear (Opuntia)
+ Nightblooming Cereus (Peniocereus greggii)

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Hedgehog cactus (Echinopsis)

Cactus flower

arizona garden

Hedgehog cactus (Echinopsis)
Family: Cactaceae
Arizona Cactus Garden, Stanford
With Nature Through Photography class class
August 18, 2019
Canon 7Dmark2
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California barrel cactus (Ferocactus cylindraceus)

A barrel of fun

Anza Borrego
California barrel cactus (Ferocactus cylindraceus)
Family: Cactaceae (cactuses)
Anza Borrego
March 29, 2019
Canon 7Dmark2

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A barrel of fun

Desert Biogeography of Joshua Tree National Park

California barrel cactus (Ferocactus cylindraceus)
Family: Cactaceae (cactuses)
Lost Palm Oasis hike
Desert Biogeography of Joshua Tree National Park
September 14, 2022
Canon R5

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Beavertail cactus (Opuntia basilaris)

Anza Borrego
Beavertail cactus (Opuntia basilaris)
Family: Cactaceae (cactuses)
Anza Borrego
March 29, 2019
Canon 7Dmark2

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Beaver tail

Desert Biogeography of Joshua Tree National Park

Beavertail cactus (Opuntia basilaris)
Family: Cactaceae (cactuses)
Key's Ranch
Desert Biogeography of Joshua Tree National Park
September 11, 2022
Canon R5

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Silver torch or wooly torch (Cleistocactus strausii)

Cactus flower

arizona garden

Silver torch or wooly torch (Cleistocactus strausii)
Arizona Cactus Garden, Stanford
With Photographing Nature class
January 19, 2019
Canon 7Dmark2
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Cholla (Cylindropuntia)

Tree cholla (Cylindropuntia imbricata)

Tree cholla (Cylindropuntia imbricata)
Family: Cactaceae (cactus)
Arizona Cactus Garden
June 7, 2021
Canon 7Dmark2

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Cholla

arizona garden

Cholla (Cylindropuntia)
Arizona Cactus Garden, Stanford
With Photographing Nature class
January 19, 2019
Canon 7Dmark2
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Golden barrel cactus (Echinocactus grusonii)

Barrel of fun

cactus

Golden barrel cactus (Echinocactus grusonii)
Family: Cactaceae (cactus family)
Arizona Cactus Garden
April 7, 2014
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Flowered barrel

cactus

Golden barrel cactus (Echinocactus grusonii)
Family: Cactaceae (cactus family)
Arizona Cactus Garden
April 7, 2014
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"Mother-in-law's cushion"

cactus

Golden barrel cactus (Echinocactus grusonii)
Family: Cactaceae (cactus family)
Arizona Cactus Garden
January 2, 2012
Canon Rebel T1i
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cactus

Golden barrel cactus (Echinocactus grusonii)
Family: Cactaceae (cactus)
Arizona Cactus Garden
April 7, 2014
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arizona garden

Golden barrel cactus (Echinocactus grusonii)
Family: Cactaceae (cactus)
Arizona Cactus Garden
August 9, 2021
Canon R5

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arizona garden

Golden barrel cactus (Echinocactus grusonii)
Family: Cactaceae (cactus)
Arizona Cactus Garden
With Photographing Nature class
January 8, 2022
Canon R5

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Prickly pear (Opuntia)

Prickly

santa cruz

Mission prickly-pear (Opuntia ficus-indica)
Family: Cactaceae (cactus)
Chaminade, Santa Cruz
October 17, 2019

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Pear

santa cruz

Mission prickly-pear (Opuntia ficus-indica)
Family: Cactaceae
Chaminade, Santa Cruz
October 17, 2019

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cactus

Prickly pear (Opuntia)
Family: Cactaceae
Arizona Cactus Garden, Stanford
With Nature Through Photography class
August 21, 2016
Canon Rebel T5i
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cactus

Prickly pear (Opuntia)
Family: Cactaceae
Arizona Cactus Garden, Stanford
With Nature Through Photography class
August 21, 2016
Canon Rebel T5i
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Nightblooming Cereus (Peniocereus greggii)

Night blooming cactus

cactus
Nightblooming Cereus (Peniocereus greggii)
Family: Cactaceae
Night drive
Araras Lodge
The Pantanal
April 1, 2011
Canon rebel T1i

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Closer

cactus
Nightblooming Cereus (Peniocereus greggii)
Family: Cactaceae
Night drive
Araras Lodge
The Pantanal
April 1, 2011
Canon rebel T1i

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cactus
Nightblooming Cereus (Peniocereus greggii)
Family: Cactaceae
Night drive
Araras Lodge
The Pantanal
April 1, 2011
Canon rebel T1i

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Its bark is as bad as its bite

galapagos
Santa Cruz
Galápagos 2010
July, 2010

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Two tone

galapagos

Las Grietas, Santa Cruz
Galápagos 2010
July, 2010
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Mexican giant cactus (Pachycereus pringlei)

Here today

baja 2024

Mexican giant cactus (Pachycereus pringlei)
Family: Cactaceae (cacti)
Bahia de los Angeles
Baja, Mexico 2024
August 24, 2024
Canon R5
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Cardón tomorrow

baja 2024

Mexican giant cactus (Pachycereus pringlei)
Family: Cactaceae (cacti)
Cactus walk
Bahia de los Angeles
Baja, Mexico 2024
August 24, 2024
Pixel 8 Pro
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Great blue heron on cardone

baja 2024


Mexican giant cactus (Pachycereus pringlei)
Family: Cactaceae (cacti)
Bahia de los Angeles
Baja, Mexico 2024
August 22, 2024
Canon R5
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Lava cactus (Brachycereus nesioticus)

Lava cactus

galapagos

Lava cactus (Brachycereus nesioticus)
Galápagos 2010
July, 2010
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Barrels

cactus

Arizona Cactus Garden
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Prickly pear

cactus

Arizona Cactus Garden
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A sharper look

cactus

Arizona Cactus Garden
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Going about their beesness

arizona garden

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Radiant

arizona garden

Arizona Cactus Garden
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Cactus bud

arizona 
garden

Arizona Cactus Garden
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Cactus flowers

arizona 
garden

Arizona Cactus Garden
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Last modified: June 7, 2023
Created: August 11, 2010
Contact: siegelr@stanford.edu
All pictures are protected by copyright. Do not use without permission.