Mammillaria geminispina (twin spin cactus) is a species of flowering plant in the family Cactaceae, native to central Mexico. It grows to 25 cm (10 in) tall by 50 cm (20 in) broad. The clustering spherical stems, 8 cm in diameter, are covered in white down and white spines. Carmine pink flowers are borne in summer and autumn.
Text Source : Wikipedia
These cactus plants have thick or thin stems grow very tall and straight. The primary example being the Saguaro cactus from the Sonoran Desert. Many columnar cactus have the name "cereus" meaning candle. Some examples are Pachycereus, Oreocereus, Stenocereus, Trichocereus, Pilosocereus, and Strombocereus. Columnar cacti have a very large water storage capacity which drastically affects it's variable weight. The weight can vary as much as three times from dry season to monsoon season.
Cycas revoluta (king sago, sago cycad, Japanese sago palm), is a species of gymnosperm in the family Cycadaceae, native to southern Japan. It is one of several species used for the production of sago, as well as an ornamental plant.
Echinocactus grusonii', popularly known as the Golden Barrel Cactus, Golden Ball or, amusingly, Mother-in-Law's Cushion, is a well known species of cactus, and is endemic to east-central Mexico.
It is rare and critically endangered in the wild, where it is found near Mesa de Léon in the state of Querétaro, and in the state of Hidalgo. The population was critically reduced in the 1990s, by the creation of the Zimapán Dam and reservoir in Hidalgo. [1] The cactus grows in volcanic rock on slopes, at altitudes around 1,400 metres (4,600 ft).
