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Prickles on a blackberry branch. In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called spinose teeth or spinose apical processes), are hard, rigid extensions or modifications of leaves, roots, stems, or buds with sharp, stiff ends, and generally serve the same function: physically defending plants against herbivory.
This is an accepted version of this page This is the latest accepted revision, reviewed on 5 March 2025. Family of mostly succulent plants, adapted to dry environments This article is about the plant family. For other uses, see Cactus (disambiguation). "Cacti" redirects here. For the software, see Cacti (software). For the album, see Cacti (album). Cactus Temporal range: 35–0 Ma Pre๊ ๊ O ...
Most cacti possess spines, some large enough to cause serious wounds. Glochids however, though smaller, commonly induce more troublesome, more persistent, dermatological manifestations in humans. Though minute, glochids commonly are barbed and once they have penetrated the skin barbed glochids are practically impossible to dislodge without ...
Umbonia crassicornis, commonly known as the thorn bug, is a widespread member of the insect family Membracidae, and an occasional pest of ornamentals and fruit trees in southern Florida. The body length of the adult is approximately 10 millimetres (0.39 in).
A house sparrow nesting on a saguaro cactus. Saguaros have a relatively long lifespan, often exceeding 150 years. They may grow their first side arm around 75–100 years of age, but some never grow any arms. Arms are developed to increase the plant's reproductive capacity, as more apices lead to more flowers and fruit. A saguaro can absorb and ...
For less prickly types, choose cacti such as holiday cacti, which don't have sharp spines. One more comment: Some plants that are called "cactus" belong to a different or related group of plants ...
Echinocereus triglochidiatus is a species of hedgehog cactus known by several common names, including kingcup cactus, claret cup cactus, red-flowered hedgehog cactus and Mojave mound cactus. This cactus is native to the southwestern United States and northern Mexico, where it is a resident of varied habitats from low desert to rocky slopes ...
Stenocereus thurberi, the organ pipe cactus, [3] is a species of cactus native to Mexico and the United States. The species is found in rocky desert. Two subspecies are recognized based on their distribution and height. The Organ Pipe Cactus National Monument is named for the species. Cacti are minimally adapted to particular thermal niches ...