Ferocactus latispinus – Broad-spined Cactus
Ferocactus latispinus (Haw.) Britton & Rose is one of the best-known representatives of the genus Ferocactus - barrel cacti from Mexico and the southwestern United States. The genus name comes from the Latin ferus, meaning “wild, fierce”, referring to the plants’ formidable armament. The species was described as early as 1824 by the English botanist Adrian Hardy Haworth as Cactus latispinus; in 1922, Britton and Rose transferred it to the newly established genus Ferocactus, where it remains today as an accepted name in the Plants of the World Online database. Numerous synonyms are found in the literature, including Echinocactus latispinus, Bisnaga latispina and Echinocactus cornigerus.
Known to collectors for almost two centuries under the English names devil's tongue barrel, crow's claw and candy cactus, and in Mexico as biznaga ganchuda (“hooked biznaga”), this plant owes its popularity to a combination of traits rarely found together: moderate size, spectacular flattened spines, the ability to flower at a young age and ease of cultivation. The Polish name Kaktus Szerokokolcowy is a faithful translation of the specific epithet (latus - broad, spina - spine).
Botanical description and growth habit
The stem is solitary, spherical or shortly cylindrical, becoming distinctly flattened and depressed at the apex in older specimens, and covered with woolly hairs in the growing zone. The epidermis ranges from light green to grey-green. Young plants have 8–15 sharp ribs, increasing with age to around 21, occasionally 23. Large, elliptical areoles are arranged along the ribs at intervals of 2–3 cm and are initially covered with pale wool.
The armament is the species’ distinguishing feature. There are 6–15 radial spines; they are thin, straight or slightly curved, 2–2.5 cm long, and white, yellowish, pink or reddish, with distinct transverse bands. There are usually four central spines, which are longer and more intensely coloured, measuring 4–5 cm. The lowest is strongly flattened - according to different sources, it is 4–9 mm wide - and curves downward like a hook, resembling a protruding tongue or claw. Newly emerged spines are bright red or amber and turn grey with age. In nature, the entire plant usually measures 30–40 cm in diameter and reaches a similar height; however, sources report that specimens within the species, especially in subsp. spiralis, can grow up to one metre tall.
Three subspecies are distinguished, differing mainly in the number of radial spines: subsp. latispinus (9–15 radial spines, widespread across the Mexican Plateau), subsp. spiralis (5–7, southern Puebla and Oaxaca, with spirally twisted ribs and larger dimensions), and subsp. greenwoodii (4–5). The flavispinus form, with yellow spines, is also found in cultivation.
Growth rate and development
Ferocactus latispinus grows slowly, although compared with its giant relatives, such as Ferocactus wislizeni and F. pilosus, it reaches a mature appearance relatively early. In its first years, a seedling resembles a green ball with small but already flattened spines; the typical “ferocactus” form with tall ribs develops once it reaches 5–8 cm in diameter. Under good conditions, the plant increases in diameter by several millimetres per year, so a 15-centimetre specimen is usually 6–10 years old, while full-sized plants are several to several dozen years old.
Like other barrel cacti, the species stores water in the fleshy stem tissue, while its shallow, widely spreading root system allows it to quickly absorb water from brief rainfall. An interesting hypothesis cited for the genus as a whole is that the hooked spines help with dispersal: during sudden floods, uprooted plants may catch on the substrate in places where water and sediment accumulate. The plants are long-lived – specimens several decades old are known in collections.
Flowering and propagation
The species’ greatest horticultural asset is its early flowering. While most ferocacti do not flower until they have reached a considerable size, Ferocactus latispinus produces buds when it is only about 15 cm in diameter. The flowers develop from woolly areoles at the top of the stem, are funnel-shaped, and measure about 3.5–4 cm in length and width. Their colour varies from light pink and purple through violet and bluish-violet to cream and yellowish, often with a darker stripe along the centre of the petal. The outer tepals are scaly and darker.
The flowering period is distinctive – late autumn and early winter, corresponding to the end of the rainy season in central Mexico. In European cultivation, this means that buds appear from September to November, and their development depends on the amount of light and warmth during this period; plants moved early to a cool, dark wintering place often abort their buds. The flowers open on sunny days and are pollinated by bees. The species is largely self-incompatible, so two unrelated plants are needed to obtain fruit. The fruits are oval, yellowish to reddish, covered with scales, up to 2.5 cm long, and contain numerous small, dark seeds. Because the plant almost never produces offsets, it is propagated almost exclusively from seed in practice.
Environmental requirements and tolerance
In nature, the species inhabits upland, semi-desert landscapes of central Mexico at elevations of 600–2600 m above sea level. It occurs in dry oak forests, grassy plains, alluvial clays, among shrubs and on rocky outcrops – often sheltered by shrubs or trees that protect it from full sun and nighttime cold during its youth. The climate in these regions is characterised by moderate, sunny days, cool nights, a summer rainy season and a dry winter, when light frosts occasionally occur.
This results in the plant's tolerance: it withstands heat and drought exceptionally well, copes well with temperature fluctuations between day and night, and with dry roots can survive brief drops to around -4°C (some gardening sources even give -5°C). However, it does not tolerate persistent frost, prolonged moisture at low temperatures, or heavy, poorly drained soil. This corresponds to USDA hardiness zones 9–11; in cooler regions of Europe, the species is grown exclusively in containers.
Cultivation in temperate climates
Ferocactus latispinus is considered one of the easier ferocacti to grow when three conditions are met: maximum sunlight, a mineral-based substrate, and a dry, cool winter dormancy. The site should be as bright as possible - a south-facing windowsill, greenhouse, or open space outdoors in summer. Only in strong light do the spines develop their full width and colour, while the stem retains its spherical shape. The substrate should consist of pumice, lava rock, or perlite (about half the volume), coarse sand and gravel, and a small amount of humus; the pH should be slightly acidic to neutral. The pot - preferably made of clay - should be only slightly wider than the plant, with mandatory drainage.
From April to September, water abundantly, but only after the substrate has dried out completely; in hot weather, this may mean once a week, while in cooler periods, once every two to three weeks. Use cactus fertiliser at half strength every 4–6 weeks. From October, reduce watering, and from November to March, keep the plant completely dry in a bright, cool place at a temperature of 5–12°C. This dormancy strengthens the tissues, prevents stem elongation, and promotes bud formation. Wintering in a heated room that is too warm and dark is the most common cause of deformities. In spring, gradually acclimatise the plant to sunlight to avoid scorching the epidermis.
The main pests are mealybugs (including root mealybugs), spider mites, and scale insects; the primary disease remains root rot caused by overwatering. Repotting every 2–3 years in early spring is best done while wearing thick gloves or using folded newspaper, as the hooked spines can easily cause injury and are difficult to remove from the skin.
Use in ornamental horticulture
The species is one of the most widely cultivated ferocacti in the world and a permanent feature of amateur collections and botanical gardens. Its ornamental value does not depend on flowering - its geometric ribs and colourful, broad spines decorate the plant throughout the year. In temperate climates, it is most often grown as a solitary specimen in a pot, in greenhouses and conservatories, as well as in desert-style arrangements alongside agaves, echeverias, and other globular cacti. In Mediterranean and subtropical regions, it is sometimes planted in the ground in rock gardens, xerophytic gardens, and gravel plantings, where it forms impressive spheres with age.
Cultural significance, history and name etymology
Barrel cacti of the genus Ferocactus, known as biznagas in Mexico, have been part of local culture for centuries: their flesh was used to make the candied delicacy acitrón, while the dried fruits and flowers of some species were used in cooking. The name candy cactus is associated with Ferocactus latispinus, although harvesting plants from the wild is now regulated in Mexico to protect wild populations, and biznagas symbolize the heritage of the Mexican Plateau landscape rather than a raw material. The common name “devil’s tongue” refers to the protruding red lower spine, which resembles an extended tongue.
The species’ scientific history dates back to the beginnings of European interest in cacti: Haworth described it in 1824 based on plants imported to England, before the modern taxonomy of the family had taken shape. The genus Ferocactus, established in 1922 by Nathaniel Britton and Joseph Rose in the monograph “The Cactaceae”, now comprises about 30 species from the southwestern United States and Mexico; F. latispinus is one of the southernmost and most variable of them.
Who this species is for
This plant is suitable for both beginners and experienced collectors. Beginners are attracted by the species’ forgiving nature - it tolerates missed waterings, grows in an ordinary pot on a windowsill and does not need much space. Experienced growers value the variation in spine colour, the opportunity to compare subspecies and the satisfaction of bringing the plant to autumn flowering, which in European conditions requires balancing light, warmth and the timing of the start of dormancy. The only serious requirement is a truly sunny position.
Summary
Ferocactus latispinus combines everything expected of a barrel cactus: a compact, spherical form, impressive flattened and hooked spines in shades of red, early autumn flowering in colours ranging from pink to violet, and tolerance of drought and care mistakes. With full sun, a mineral substrate and dry, cool overwintering, it remains an ornament of the collection for decades. In the IUCN Red List, the species is classified as Least Concern, and its populations on the Mexican Plateau remain numerous, although they are locally threatened by illegal collection and habitat conversion.
