Ferocactus

Ferocactus is a genus of large barrel-shaped cacti, mostly with large spines and small flowers. There are about 30 species included in the genus Ferocactus. They are found in south-western USA and north-western Mexico. The young specimen are columnar but as they grow older ribs form and they take on a barrel form. Most of the species are solitary but some, such as Ferocactus robustus and F. glaucescens form clumps. The flowers are pink, yellow, red or purple depending on the species, and the petals sometimes have a stripe of a darker colour. They are desert dwellers and can cope with some frost and intense heat. In cultivation they require full sun, and little water but good drainage. The propagation is usually from seeds.


Species
Ferocactus cylindraceus is a species of barrel cactus which is known by several common names, including California barrel cactus and miner's compass. This cactus is usually cylindrical or spherical, with some older specimens forming columns two meters in height. It is covered in long, plentiful spines, which are straight and red when new and become curved and gray as they age. It bears bright yellow flowers with red or yellow centers on the side that faces the sun. The fleshy, hollow fruits are yellow. This cactus is native to the Mojave and Sonoran Deserts. A picturesque organism, this already uncommon plant is threatened by collectors.

Ferocactus echidne is a barrel cactus in the genus Ferocactus. It is found in nature in Mexico. This cactus is known commonly as "Sonora Barrel," "Coville's Barrel Cactus," "Emory's Barrel Cactus," and "Traveler's Friend."

Ferocactus glaucescens is a barrel cactus in the genus Ferocactus.

Ferocactus viridescens is a rare species of barrel cactus known by several common names, including coast barrel cactus and San Diego barrel cactus. It is native to southern California and northern Baja California. Most of its native range is in San Diego County, California, where it is threatened by development, agriculture, and other alterations in its habitat. This cactus is spherical, oblate, or nearly cylindrical, is usually wider than tall, and less than 30 centimeters in height. The flesh is bright green and arranged into several ribs covered in arrays of long spines. The spines stick straight out and may curve a bit, and are red when new, dulling to gray or tan. The cactus blooms in yellow to greenish flowers with red or pink scales. The fruit is yellow or red.

Ferocactus wislizeni, the Fishhook Barrel Cactus, also called Arizona Barrel Cactus, Candy Barrel Cactus, and Southwestern Barrel Cactus, is a cylindrical barrel-shaped cactus. The Fishhook Barrel cactus typically grows to a diameter of roughly two feet and a height of three to six feet. However, specimens as wide as three feet and tall as ten feet have been recorded.

Ferocactus flavovirens

Ferocactus fordii

Ferocactus glaucescens

Ferocactus gracilis - Fire Barrel Cactus

Ferocactus hamatacanthus - Mexican Fruit Cactus, Texas Barrel Cactus, Turk's-Head Barrel Cactus

Ferocactus herrerae - Twisted Barrel Cactus

Ferocactus histrix - Electrode Cactus

Ferocactus horridus

Ferocactus johnstonianus - Johnston's Barrel Cactus

Ferocactus latispinus

Ferocactus macrodiscus

Ferocactus peninsulae

Ferocactus pilosus - Mexican Lime Cactus, Viznaga De Lima

Ferocactus pottsi

Ferocactus rectispinus - Long Spined Barrel Cactus

Ferocactus reppenhagenii

Ferocactus robustus

Ferocactus santa-maria - Santa-Maria Barrel Cactus

Ferocactus schwarzii - Schwarz's Barrel Cactus

Ferocactus stainesii

Ferocactus townsendianus - Townsend Barrel Cactus

Ferocactus alamosanus

Ferocactus chrysacanthus

Ferocactus diguetii

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