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1. ancistrocactus (Phocagallery / ancistrocactus) Habitat: Mexico, Texas. Description: globular, sometimes upright cylindrical, cacti with big areoles each of them bearing a central hooked spine; they may develop a taproot. The diurnal flowers are borne ... 2. ariocarpus (Phocagallery / ariocarpus) Habitat: Texas, New Mexico, Northern Mexico. Description: they have a short stem with hard, large tubercles and a fleshy taproot. The white, pink or purple flowers arise from the centre. They are adapted ... 3. aylostera (Phocagallery / aylostera) Habitat: mountainous regions of South America, particularly in Bolivia and Argentina. Description: globular cacti with tubercles arranged in spirals; they tend to sucker. Young as well as adult plants ... 4. carnegiea (Phocagallery / carnegiea) Habitat: Arizona, southwestern California, State of Sonora (Mexico). Description: a genus of gigantic columnar cacti that may reach 15 metres (50 ft) in height. Very long-lived, they’re commonly ... 5. cephalocereus (Phocagallery / cephalocereus) Habitat: Central and South America, particularly Brazil. Description: a columnar ribbed cactus with spiny areoles bearing flowers near the top when the plant is mature, usually after several years. It ... 6. coryphantha (Phocagallery / coryphantha) Habitat: United States, Mexico. Description: globular or columnar cacti, usually densely spined with a tuberous taproot system. The tubercles, each bearing an areole, are arranged in spirals and vertically ... 7. discocactus (Phocagallery / discocactus) Habitat: Brazil, Paraguay, Bolivia. Description: a group of globular cacti with white, large, fragrant night-blooming flowers that wither the following day. Mature plants develop a cephalium which will ... 8. echinocereus (Phocagallery / echinocereus) Habitat: Mexico, western United States. Description: the plants grouped in this genus occupy very different habitats: from sea level to elevations of approximately 3000 metres (9800 ft). Some show an ... 9. echinopsis (Phocagallery / echinopsis) Habitat: Bolivia, Argentina, Uruguay, Paraguay. Description: globular, cylindrical when older, half-hardy cacti with spiny ribs. Some grow in semi-desert regions sheltered by tufts of grasses, others ... 10. epiphyllum (Phocagallery / epiphyllum) Habitat: mainly plants of garden origin. There are hundreds of hybrids obtained by crossing Epiphyllum with Selenicereus, Echinopsis and so on. Description: these plants, growing as epiphytes in the ... 11. epithelantha (Phocagallery / epithelantha) Habitat: from Texas to northern Mexico. Description: tiny, globular plants covered with short white spines. The diurnal flowers are borne at the centre of the apical crown during the summer. They were ... 12. eriosyce (Phocagallery / eriosyce) Habitat: deserts of Peru and Chile. Description: these spherical cacti have approximately forty ribs with tough spines. Pink or purplish pink flowers appear once the plant has reached maturity, that ... 13. hatiora (Phocagallery / hatiora) Habitat: Central and South America, with a higher concentration in the rainforests of Brazil. Description: the genus comprises some epiphytic species with drooping habit that flower in late winter. It ... 14. hylocereus (Phocagallery / hylocereus) Habitat: Mexico, Guatemala, Costa Rica, the Antilles, and some northern regions of South America. The genus is spread over tropical areas with a humid, jungle-like climate. Description: a genus of forest ... 15. mammillaria (Phocagallery / mammillaria) Habitat: Mexico, south-west of the United States, South America, West Indies. Description: a genus of small, globular or cylindrical plants, from whose axils tiny, crown-shaped flowers arise; they may ... 16. melocactus (Phocagallery / melocactus) Habitat: West Indies, Brazil, Cuba, Peru, Mexico. In their native countries they can be also found growing on the seashore. Description: globular cacti with straight ribs and very variable in spination. ... 17. parodia (Phocagallery / parodia) Habitat: Argentina, Brazil, Bolivia, Uruguay, Paraguay. Description: these beautiful small, spiny cacti with a cylindrical or globular stem can bloom just 2 or 3 years after sowing. The large, funnel-shaped ... 18. pelecyphora (Phocagallery / pelecyphora) Habitat: Mexico. Description: a globular genus, growing in deserts, which has woolly areoles on the tubercles, pectinate spines that do not harm if touched and a large, fleshy root. In the spring, pink ... 19. pereskia (Phocagallery / pereskia) Habitat: tropical America. Description: a primitive genus of cactaceous plants forming shrubs with a prostrate or climbing habit; the leaves are oval and stalked, the areoles large with tufts of tough ... 20. rebutia (Phocagallery / rebutia) Habitat: Andean ranges of Bolivia, Argentina and a few other South American mountainous regions; they occur mostly at high elevations (up to 3000 m / 9800 ft) so they’re adapted to great diurnal ...
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