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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. There are about 30 species included in the genus. They are found in the southwestern United States and northwestern Mexico.
Ferocactus peninsulae reaches a height of about 70 centimetres (28 in), rarely 2.5 meters, with a diameter of 40 centimetres (16 in). This plant is oval to club-shaped and has 12 to 20 showy, deep ribs.
Originally described as Cactus latispinus in 1824 by English naturalist Adrian Hardy Haworth, it gained its current name in 1922 with the erection of the genus Ferocactus by American botanists Britton and Rose. [3] The species name is derived from the Latin latus "broad", and spinus "spine". Ferocactus recurvus is a former name for the species. [3]
Ferocactus uncinatus typically grows alone, with bluish-green, spherical to cylindrical shoots ranging from 18 to 27 cm (7.1 to 10.6 in) in height and 10 to 12 cm (3.9 to 4.7 in) in diameter. It has about 13 wavy ribs with pronounced tubercles, and sharp furrows between the ridges.
Ferocactus johnstonianus is a solitary, spherical to short cylindrical cactus that can grow over 1 meter tall and up to 35 cm (14 in) in diameter. It has 24 to 31 slightly humped ribs and 22 to 25 golden-yellow, awl-shaped spines that turn brown with age and reach up to 6 cm (2.4 in) long, without differentiating into central and radial spines.
Ferocactus tiburonensis is a solitary cactus, reaching up to 1 meter in height and 35 cm (14 in) in diameter. It has around 21 slightly tuberous ribs and grooved spines that are hard to distinguish between central and peripheral spines.
Ferocactus hamatacanthus develops elongated glands, usually 2 centimetres (0.79 in) to 4 centimetres (1.6 in), in the aeroles between the flower and the spines. At first, these glands are soft, but as they mature they become hard and spine-like.
Ferocactus cylindraceus is usually cylindrical or spherical, usually found in clusters with some older specimens forming columns grow up to 50 cm (20 in) in diameter and 3 metres (9.8 ft) in height. The stem has 18 to 27 distinct ribs and is covered in long, plentiful spines, which are straight and red when new and become curved and gray as ...
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