A cactus is a member of the plant family Cactaceae[a], which has about 127 genera and about 1750 recognized species. Cactaceae belongs to the order Caryophyllales. [4] The Latin word “cactus” is derived from the Ancient Greek word “kktos,” which Theophrastus first used to refer to a spiky plant whose identify is currently unknown. [5] There are many different sizes and shapes of cacti. Most cactus reside in settings that experience at least some drought, despite the fact that some species can tolerate fairly humid situations. Many of them can even be found in the Atacama Desert, one of the driest places on Earth, where they exist in extremely dry circumstances. Cacti have developed a variety of adaptations to conserve water as a result. As an illustration, nearly all cacti are succulents, which means that their swollen, fleshy sections are designed to store water. Unlike many other succulents, most cacti only have a stem where this crucial process occurs. The majority of cacti species no longer have actual leaves; instead, they only have spines, which are heavily modified leaves. Spines help limit water loss by slowing air movement around the cactus and offering some shade, in addition to protecting it from herbivores. Photosynthesis is performed by cacti’s expanded stems in the lack of real leaves. Except for Rhipsalis baccifera, which also grows in Africa and Sri Lanka, all of the Americas, from Patagonia in the south to sections of western Canada in the north, are home to cacti.
Areoles, a type of greatly shortened branch, are specialized structures that create cactus spines. Cacti can be identified by their areoles. Areoles also produce multipetalled, tubular blooms in addition to spines. Because many cacti have extended dormant periods and short growing seasons, they may respond fast to any rainfall. This is made possible by their large but shallow root systems, which swiftly absorb any water that reaches the ground surface. Because cactus stems are frequently ribbed or fluted, they can easily stretch and contract to quickly absorb water after rain and then hold onto it during protracted droughts. The majority of cacti use a unique process called “crassulacean acid metabolism” (CAM) as part of photosynthesis, similar to other succulent plants. Unlike photosynthesis, which occurs during the day, transpiration—during which carbon dioxide enters the plant and water escapes—occurs at night. The plant converts the carbon dioxide it absorbs into malic acid and stores it there until daybreak, when it is solely used for photosynthesis. The cooler, more humid nighttime hours are when transpiration occurs, which greatly reduces water loss.
The globe-shaped stems of many smaller cacti combine the maximum volume of water storage with the smallest surface area of transpiration loss. The largest[b] free-standing cactus is Pachycereus pringlei, which reaches a maximum height of 19.2 m (63 ft)[7], while Blossfeldia liliputiana has the lowest diameter at maturity, measuring just around 1 cm (0.4 in). [8] During a downpour, a mature saguaro (Carnegiea gigantea) is believed to be capable of soaking up 200 US gallons (760 l; 170 imp gal) of water. [9] Only a few species look significantly like the rest of the family. Plants belonging to the genera Leuenbergeria, Rhodocactus, and Pereskia resemble nearby trees and bushes, at least on the surface. They have enduring leaves and, as they age, stems covered with bark. Despite their appearance, they are recognized as cacti by their areoles and have numerous water-saving adaptations. Leuenbergeria is thought to be very closely related to the original species from which all cacti descended. Other cacti develop as forest climbers and epiphytes in tropical areas (plants that grow on trees). Their stems often have fewer or even no spines and are flattened, almost leaf-like in appearance, like the well-known Christmas or Thanksgiving cactus (in the genus Schlumbergera).
Many types of cacti are produced as beautiful plants, while others are raised for fodder or forage, and yet others are utilized as food (particularly their fruit). An bug that lives on some cactus produces cochineal.
Many succulent plants, both in the Old and New Worlds, have spiky stems, including some members of the Euphorbiaceae (euphorbias), which is why they are frequently mistakenly called “cactus.”
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Do cacti grow in African deserts?
Life of every type can be found in the Sahara and its oases and plateaus. Beyond the vegetation mentioned above, you can anticipate to see figs, oranges, acacia trees, tobacco plants, oleander, peyote cacti, and a great deal more.
Cacti can be found in Egypt?
Thus, cactus are not visible in Egypt. If so, they were likely brought in by men and preserved in pots. Except for the Rhipsalis Baccifera, which grows in subtropical parts of Africa, there are no native cacti to Egypt. Additionally, this cactus species can also be found in the Americas. Therefore, it is disputed if they are indigenous to Egypt alone.
Do you want to know more about the survival and growth of cacti? Read this article to learn how a cactus may thrive in the desert.
Can you find cactus in South Africa?
EVEN though South Africa is home to several native succulents, there is only one native cactus.
Additionally, this plant doesn’t resemble a cactus in the least bit. Elsa Pooley’s Guide to Wild Flowers of KwaZulu-Natal and the Eastern Region describes it as a straggling pendulous epiphytic succulent under the name Rhipsalis baccifera. It only has clumps of innocuous fuzzy spines rather than actual spikes. It resembles mistletoe somewhat thanks to its luscious white (sometimes pink or red) berries, which is presumably how it got its common name, mistletoe cactus.
We do observe a lot of alien cacti growing in the wild in this nation, including different prickly pear species like Opuntia ficus-indica and Opuntia monacantha. Many of these cacti have developed into unruly weeds. Except for the spineless horticultural variants, both of these plants are categorized as invaders, according to Richard Boon’s book Pooley’s Trees of Eastern South Africa. It’s great to hear that non-invasive versions have been created because they are incredibly valuable plants. Their delicious fruit is used to create a variety of goods, including jams and alcoholic beverages.
They are also utilized as hedging and as feed. Richard claims that the cochineal insects that consume Opuntia species are the ones that produce the cochineal or carmine dye that is used to color food, cosmetics, and clothing.
The good news is that utilizing biocontrol chemicals to stop the spread of invasive prickly pear species has worked well for conservationists.
The invasive Cereus jamacaru, often known as the “queen of the night,” is a beautiful plant with big white blooms that bloom at night and has been added to South Africa’s list of undesirable plants. It should not be grown because it has unfortunately become invasive.
Some of the Euphorbia family members, such as the Euphorbia ingens, also referred to as the naboom, are endemic to South Africa and resemble cactuses the most.
They are widely dispersed in the northern savannahs, according to Gideon F. Smith and Neil R. Crouch’s “Guide to Succulents of Southern Africa.” Euphorbia tetragona, sometimes known as honey euphorbia, is another common and attractive member of this species. This species can be found in the KwaZulu-Natal and Eastern Cape valleys, where it develops into a strong tree similar to the naboom. Not every euphorbia grows to be a size of a giant cactus. Euphorbia pulvina, which hugs the ground, resembles an overgrown pincushion. The dwarf succulent Euphorbia Woodii is described as having a “Medusa-like head growing prostrate on the soil surface” in the succulent guide.
Our larger, tree-like aloes make excellent cactus substitutes. The beautiful Bulbine, Gasteria, and Haworthia species, among other eye-catching relatives, are highly prized by enthusiasts of succulent plants.
There are numerous additional succulent families in southern Africa, the majority of which make excellent, water-wise, intriguing, and attractive garden topics. Of course, the Baobab (Adonsonia digitata), which can develop into a vast, enormous-girthed tree, is our largest succulent native to southern Africa.
The writers of the succulent guide note that plants like succulents that must endure times of intense stress typically are rich in compounds that frequently have medical uses. People in southern Africa have traditionally used succulents as a form of medicine.
They can be used for a variety of other things. Some are sold as traditional medicines, some are utilized as food, and some serve as a source of fiber for weaving and making ropes. The two writers argue that succulents are becoming more and more important in the effort to provide enough food for our expanding southern African population as well as sustainable plant material for use in traditional medical treatments.
Are there cactus in other nations?
Numerous kinds of blooming plants with succulent (water-storing) stems belong to the family Cactaceae. Cacti are unique among all other plants due to the existence of an organ called the areole. Flowers, new branches, and spines emerge from areoles. Spines come in a variety of shapes and sizes; some are delicate and feathery to shield the plant from harsh sunlight, while others are strong and spiky to provide protection. The spines on cacti restrict animals from getting to their water supply, even though they may be one of the few sources of water in arid areas. Cacti have a waxy covering called a cuticle that serves as a barrier against water loss. They also use stomata, which open at night instead of during the day like other plants do, to conserve water. The plant’s stomata are tiny pores that allow carbon dioxide to enter for photosynthesis.
The size of cacti varies according on the species. Blossfeldia liliputana, a South American plant with a mature diameter of less than an inch (2.5 centimeters), may be the smallest cacti species. The Mexican enormous cardon, which is almost 60 feet tall, is the tallest cactus (18 meters).
The majority of cacti genera originated in the Americas and can be found from Canada to Chile. They are now widespread around the world, particularly in Australia, South Africa, and nations in the Mediterranean.
Some people mistakenly believe that cacti are only found in the desert, yet many species, like the prickly pear cactus, may be found in a variety of settings.
Cacti are seed-producing blooming plants. They are able to bloom every year, but when it rains a lot, they will produce a lot of flowers. Different flowers have different looks and smells to draw different pollinators, like insects and bats. Cacti grow slowly and have a long lifespan. Saguaro cacti, for instance, can survive for up to 175 years. Between the ages of 75 and 100, they do not develop their first arms.
Populations of cacti are generally stable. However, some species are diminishing as a result of being taken out of the wild and planted on xeriscaped lawns as decorative plants (landscaped areas that require little or no irrigation).
Most cacti have root systems that stretch out near the ground to absorb as much precipitation as they can. Some species can survive several years of drought because they are adept at storing water.
What arid regions have cacti?
Desert Ruins: A region where Sonoran vegetation and Giza architecture coexist.
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The protagonist and his comic relief sidekick are struggling across the scorching sands in search of water or cover when they come across a saguaro cactus. They’re advancing through Arabia’s deserts, which is a concern.
Most deserts in fiction feature cactus, most frequently the traditional two-armed saguaro, though barrel and beavertail cacti are also common. However, the only native plant life in the Sahara is naked rockcacti, which are found solely in the Americas. Contrary to popular belief, the saguaro exclusively grows in the Sonoran Desert, which is mostly comprised of areas of western Sonora in Northern Mexico, southern Arizona in the United States, and a very small portion of southern California. None of Texas, Utah, New Mexico, Nevada, Chihuahua (which is only desert near the US border), Baja California (which has a completely distinct ecology), Northern Arizona, Eastern Sonora, or even Chihuahua in its entirety are included (which is actually a subtropical land).
Even in high-altitude and colder regions, the entire Cactaceae family is native only to the Americas.
note The only exception is the mistletoe cactus, which can be found throughout Africa and Sri Lanka. If humans have deliberately brought them to the area or cultivated them for their fruit or for decoration, only then will you find them elsewhere (usually, the latter leads to the former; feral prickly pears descended from ones raised for fruit are a pretty common sight in the semi-deserts of southern Europe and the deserts of North Africa and the Middle East).
When discussing completely Constructed Worlds—more specifically, those in which the Americas or any other organism’s real-life natural range don’t truly exist—this particular portrayal encounters some ambiguity. In these situations, cactus in any desert are really no more or less unrealistic than any other real flora and animals anywhere. Be aware, though, that in certain instances, cacti may nevertheless be found in settings that are obviously based on or styled after places where they don’t often thrive.
There is no better way to show that you are in a hot desert than to include a cactus. While many people have heard of peyote, few are aware that it is a cactus—at least not until someone on television is stranded in the desert and is about to pass out from thirst and remembers that cacti are full of water… This trope is increasingly used to justify an Intoxication Ensues or a Mushroom Samba. And half the battle is knowing.
A different myth holds that all deserts, with the exception of cacti, are just hot, sandy wastelands, entirely ignoring the fact that all deserts, with the exception of Antarctica, contain thriving ecosystems with their own distinct animal and plant life. Although cacti are the most well-known, other less well-known species include Agaves, which were originally from Mexico but are now found all over the world, and Aloes, which are endemic to Southern Africa and some regions of Arabia. The part regarding sand is particularly overstated because many deserts are actually rocky rather than sandy, including those where cactus naturally flourish. The largest erg in the world, a sandy dune desert, is Rub al-Khali, which is largely in Saudi Arabia. Rub al-Khali also has a lot of human development because it is one of the most oil-rich regions in the world. In addition, it’s not always hot in a desert. More about extremes than heat is the case. Due to the proclivity of desert landscapes to experience temperature variations, a person traveling across the desert may need to consider the possibility of both hypothermia and heatstroke occurring within a single 24-hour period.
Cacti are common obstacles in games featuring Shifting Sand Land levels, frequently appearing as sharp objects that inflict harm upon contact. You have to wonder how sharp these needles must be for even a few bumps to kill a person. These are also the sole distinguishing characteristics of a Sea of Sand that you may anticipate seeing.
Most likely a result of either California Doubling or Artistic LicenseGeography as a result of a lack of funding to film on location elsewhere.