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A cactus (pl.: cacti, cactuses, or less commonly, cactus) [3] is a member of the plant family Cactaceae (/ k æ k ˈ t eɪ s i. iː,-ˌ aɪ /), [a] a family of the order Caryophyllales comprising about 127 genera with some 1,750 known species. [4]
Pediocactus simpsonii, known by the common names mountain cactus, snowball cactus, and mountain ball cactus, is a relatively common cactus that has adapted to survive in cold and dry environments in high elevation areas of the western United States. It can be found at higher elevations than any other cactus in North America.
The Cactoideae are the largest subfamily of the cactus family, Cactaceae, and are widely distributed throughout the Americas. Cactaceae is the 5th most endangered plant or animal family evaluated globally by the International Union for Conservation of Nature. [1] Around 80% of cactus species belong to this subfamily. [2]
A tiny cactus, it may reach a maximum size of 55 millimeters tall by 30 mm wide. It is often smaller, growing to the size of a US penny. [3] An individual is considered to be an adult when it exceeds 10 mm in diameter. [4] It is spherical or somewhat cylindrical in shape. The areoles are round and covered in hairs. Each areole has up to 26 ...
In their natural habitats, they grow in a disk shape, half hidden in the ground, reaching around 8 cm in diameter and 2-3 cm in height. In cultivation, they become nearly spherical. Adult tubers can reach 15 cm in diameter, larger than the above-ground parts.
At the apex of the adult plants, there is a wooly cephalium, white or shaded with yellow or grey. The terminal cephalium, up to 4 centimeters high, is slightly depressed. It consists of white, yellowish to grayish white wool and may have bristly spines.
Cylindropuntia leptocaulis, the desert Christmas cactus, desert Christmas cholla, pencil cactus, or tasajillo, is a species of cholla cactus. Distribution and habitat [ edit ]
Its stems have 5–8 slightly arched ribs, about 1 cm high. The cactus features 1–4 strong, protruding, whitish central spines up to 4.5 cm long, and 11–18 whitish marginal spines measuring 1.3–2.2 cm. The tubular red flowers bloom during the day, measuring 7–10 cm in length and 2–3 cm in diameter, with reflexed bracts.