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Ferocactus pottsii (Salm-Dyck) Backeb.

Echinocactus pottsii Salm-Dyck

Biznaga

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
GenusFerocactusFrom the Latin ferus, “fierce,” and cactus, referring to its heavy spines
Speciespottsii

About plant names...

Whatever this cactus is called (see below), it is a Mexican native.

Identification: Plants are up to 3' (1 m) tall and 20" (50 cm) in diameter, with 20 ribs. Each areole (the base of a spine cluster) contains a central spine up to 3" (7.5 cm) long, and 3-8 radial spines. Larger spines are darker, tinged with red-brown, and smaller spines are grayish white or yellow. Flowers are shaped like small bowls (most in this genus are funnel-shaped), and are yellow, sometimes with orange-red centers.

References:

Anderson, Edward F., The Cactus Family, Timber Press, 2001, p. 334

Online References:

Ferocactus pottsii at the Arizona Sonora Desert Museum Sonoran Desert Digital Library

Ferocactus pottsi on Desert-tropicals.com

Ferocactus pottsii at the Tucson Cactus and Succulent Society

Ferocactus pottsii at the Arizona-Sonora Desert Museum Center for Sonoran Desert Studies

Ferocactus pottsi var. alamosensis on Cactus Art: the World of Cacti & Succulents

Ferocactus pottsii description by Thomas H. Kent, last updated 25 May 2020.

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Ferocactus pottsii (biznaga)

5/24/2009 · Arizona Sonora Desert Museum, Tucson, AZ
≈ 17 × 17" (43 × 43 cm)