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Pachycereus marginatus

Cereus marginatus

Lemaireocereus marginatus

Marginatocereus marginatus

Stenocereus marginatus

Cereus gemmatus

Mexican Fence Post Cactus, Organ Pipe Cactus, Mexican Fencepost

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassCaryophyllidaeCacti, many other succulents, carnivorous plants, and leadworts
OrderCaryophyllalesIncludes cacti, carnations, amaranths, ice plants, and many carnivorous plants
FamilyCactaceaeSucculent (water-storing) plants, often spiny
GenusPachycereus
Speciesmarginatus

About plant names...

Mexican fence post cactus is native to Mexico.

Identification: These cacti reach 5-10' (1.5-3 m) in height, and up to a maximum of 20' (6.1 m). They grow in clusters, branched at the base, but unbranched above. The straight columns are 3-4" (7.6-10 cm) around, with 5-7 ribs. Pink or greenish-white flowers 1¼-1½" (3.2-4.2 cm) around grow along the edges of the ribs, becoming dark red fruits ¼" (8.4 mm) in diameter.

Edibility: The small red fruits are edible, and very sweet.

Online References:

Pachycereus marginatus at George and Audrey DeLange's Arizona wildflower site

Pachycereus marginatus on CactiGuide.com

Pachycereus marginatus on Desert-tropicals.com

Pachycereus marginatus on Cactus Art: the World of Cacti & Succulents

Pachycereus marginatus on the Madrean Archipelago Biodiversity Assessment

Pachycereus marginatus description by Thomas H. Kent, last updated 16 Aug 2013.

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Pachycereus marginatus (Mexican Fence Post Cactus, Organ Pipe Cactus, Mexican Fencepost)

5/25/2009 · Boyce Thompson Arboretum, Superior, AZ
≈ 29 × 43" (73 × 110 cm)

Pachycereus marginatus (Mexican Fence Post Cactus, Organ Pipe Cactus, Mexican Fencepost)

2/24/1998 · Antigua ID is uncertain

Range: Zones 9b-11:

About this map...