The succulent members of the Euphorbia genus of plants are renowned for their graceful and architectural appearance.
Due to the fact that many of the common kinds are stem succulents, these plants are sometimes mistaken for cacti. However, they actually belong to a completely separate genus that has nearly 2000 species!
This article will discuss what makes Euphorbia so distinctive and remarkable, why it is not a cactus, how to care for Euphorbia, which species are some of the more well-known ones, and other topics.
There are a few key differences which I will break down:
Cacti are only indigenous to the New World, with the exception of the Rhipsalis baccifera. There are no cacti in Europe, Russia, Australia, nor in Africa or Asia (except for that one species of Rhipsalis). On the other hand, euphorbia are native to many regions of the world, although those from Africa and India are the most cactus-like.
Both cacti and euphorbias have prickles, however the prickles on each species are unique. All cacti have areoles, which are structures that serve as the source of the spines, which are modified leaves. The most common thorns on euphorbias are modified stems that are typically seen in pairs. Areoles do not exist in euphorbias.
Cacti and succulent Euphorbias both retain water for dry spells, but latex, a hazardous sap, is present in all Euphorbias. It is most likely a Euphorbia if you cut open a succulent and it weeps this white fluid.
Cacti and Euphorbias both produce flowers, however the blossoms are typically extremely dissimilar. Euphorbia blooms are often subtle, whereas cactus blossoms are frequently spectacularly colorful and striking. Flowers from euphorbia are frequently a light greenish-yellow tint. However, some Euphorbias, such as Euphorbia milii, have vivid flowers (Crown of Thorns).
So there you have it—in a nutshell, the similarities and differences between cacti and euphorbias. Next time you see a spiny succulent, you’ll be able to identify it as a cactus, a Euphorbia, or something else by taking a closer look.
What two characteristics do cacti and euphorbia plants have in common?
Euphorbia and cactus differ mostly in their flowers and thorns. While euphorbia thorns emerge directly from the stem, cactus thorns emerge from areoles. Euphorbia flowers are highly modified, tiny, often yellow in color, and lack petals, but cactus flowers likewise emerge from areoles, are vividly colored, and are immediately recognizable.
Euphorbia plants and cacti are frequently confused with one another. These are two different species, though, and they differ in a number of ways.
What cactus is a member of the Euphorbia family?
Only by understanding the physical differences between cactus and euphorbia can you tell one from the other. The majority of these traits aren’t obvious, but you’ll be able to tell the differences once you know where to look. Here are some characteristics that set euphorbia and cactus plants apart.
The Areoles in Cacti
Where the spines, flowers, and stems of cacti plants grow are the fuzzy, cushion-like spots known as areolas. All cacti species have areoles, which can be either white or yellow. Even though they aren’t noticeable at a distance, if you look closer, you can still see them.
The areoles are absent from euphorbia and other plants. So, you must look cautiously if you mistake any plant for a cactus. It is impossible to identify a plant as a cactus if the areoles are not present. The euphorbia plant is no different.
The Thorns
Both cacti and euphorbia species have stems that have been adapted to resemble thorns. Euphorbia’s thorns can be found in pairs or alone. This plant’s stem is covered in stiff thorns. You’ll have a damaged euphorbia plant if you remove the thorns but leave the limb.
The thorns on cacti are actually spines, which are altered leaves. The spines can grow in a variety of shapes in addition to circular. Cactus spines always protrude from the areolas, regardless of the forms they assume. A cacti plant’s spine can be easily removed without leaving a wound. Even some cacti have been reported to have spines that can readily break off the plant and pierce an animal’s flesh.
Despite the fact that this is still another crucial distinguishing feature, you must also be aware that not all euphorbias and cacti produce thorns. You must therefore hunt for a distinct identifying characteristic in those euphorbias and cacti without thorns or spines.
The Flowers
The blossoms are another another crucial characteristic that sets cactus apart from euphorbia. Beautiful, vibrant flowers with vital components like petals and stamens bloom on cacti. Typically colorful and beautiful, their blossoms can be given as presents. Cactus flowers also sprout from the cushion-like areole, much like the spines do. Both pistils and stamens are present in the flowers. This indicates that many cactus species self-pollinate.
The flowers of euphorbia are typically tiny and yellow. These blossoms lack petals. These flowers are less showy than those of cactus and occasionally risk being overlooked. Typically, they produce unisexual flowers, which may contain only pistils or only stamens. Euphorbia plants can’t self-pollinate like their counterparts, thus this means they can’t.
The flowers of some euphorbia species, such as the crown of thorns, are encircled by modified leaves known as brightly colored bracts.
The Leaves
Euphorbias that resemble cactus-like spiky plants grow leaves. These little leaves disappear each season. On sunny days, they might come off, preventing water loss.
On the other hand, cacti contain spines that are modified leaves. Additionally, some cacti have stems that resemble leaves. Cacti, however, do not have leafy leaves. There are several remarkable ones, such as the leaves- bearing Pereskia and Opuntia. However, as they grow, even these ones lose their leaves.
The Genius and Species
Families of euphorbia differ from those of cactus plants. In the Euphorbiaceae family, there is only one genus of it. 2000 different species make up the spurges genus, some of which are utilized as house ornaments.
The Cactaceae is a large family that includes cacti. They come in up to 175 genera and up to 2000 different species. Popular genera like Cereus, Echinocactus, and Opuntia are present. The majority of cacti are also grown indoors.
The Milky Sap
By cutting it, you may further distinguish euphorbia from cactus. When you harm euphorbia plants, their stems secrete a milky sap. Because it is sticky and poisonous, the sap is not very friendly to both animals and people. If it comes in contact with the skin or eyes, it frequently irritates them. When it contacts your body, it can potentially result in serious inflammation. With the exception of E. abdelkuri, whose sap is typically yellow, the sap is primarily white.
You can obtain a clear, non-sticky sap from cactus that doesn’t bother the skin. Nevertheless, some cacti continue to generate white, milky sap that resembles euphorbia sap. The Mammillaria is a prime illustration of this.
The Evolution
Despite sharing nearly identical traits, cacti and euphorbias have separate evolutionary histories. North, South, and Central America are all home to cacti. Even if other species, including Rhipsalis baccifera, are native to the Old World, these plants evolved in the New World.
Succulents called euphorbias originated in the Old World. They primarily developed in Madagascar, Africa, and Asia’s arid regions.
Most of these plants can be found in their natural habitats. The Opuntia cactus, which escaped from its natural home and is now a weed in various regions of the world, is an exception.
How are euphorbia and cactus similar?
Euphorbia and cactus share a lot of characteristics, which is the outcome of convergent evolution. Euphorbias and cacti are two examples of stem succulents, a class of plants that store water in the stem tissues of their plants. These plants are able to endure in extremely arid environments due to this adaptability and their lack of leaves.
How dangerous is euphorbia?
The Royal Horticultural Society classifies euphorbia as a blooming plant in the spurge family and warns that it is “poisonous and a skin and eye irritant” (RHS).
According to the Indian Journal of Ophthalmology, “The milky sap of the Euphorbia plant, often known as latex, is extremely poisonous and irritating to the skin and eyes.
It continues by stating that it “may lead to severe skin and ocular irritation.
It suggests that anyone who work with euphorbia plants “should protect themselves from the plant’s toxicity by donning gloves and eye protection.
To ward off herbivores, euphorbia has developed a poisonous sap that the plant will release if it is damaged in any way. On contact with your hands, the sap can lead to unpleasant irritation.
Horticulturist Alys Fowler says: “Because euphorbia sap makes skin photosensitive, handling it unprotected in the sun might result in blisters.
If sap gets on your skin, wash it off completely with soap and water. The sap should be cleaned with soap or milk if it has congealed on the skin because it is no longer water soluble.
According to Colorado State University’s reference to hazardous plants, if the sap gets into your eyes, it can induce conjunctivitis and even lead to blindness.
Red or pink eye, another name for conjunctivitis, typically affects both eyes. According to the NHS, conjunctivitis symptoms include:
How frequently should a Euphorbia cactus be watered?
Every residence near a Joshua tree has a Euphorbia Ingens. It is known as the “cowboy cactus” and “good luck cactus,” and believe it or not, with the appropriate lighting, they are quite simple and straightforward to maintain. This instantly transforms any space into the boho paradise of your dreams when you throw it in. Euphorbia ingens are quite gorgeous!
Water: During the summer, water your euphorbia every two weeks. However, make sure the soil is fully dry before each watering. Make sure the water drains through the grower’s nursery container before watering. The main enemy of its beauty is excessive watering, which causes root rot. From November to March, don’t water your plants. Just a tiny bit of water is required once a month, if you feel the need to water at all. Allow them to rest since they remain dormant throughout these months.
What does light love, do cacti? Find your new cactus companion a sunny spot where it can live happily ever after.
Moisture: Euphorbia Ingens will blend seamlessly into the typical home environment. They need misting since they prefer it dry.
Pet-safe: Handle your euphorbia with extreme caution. To protect yourself, it is advised to handle with gardening gloves. The white, very toxic African milk sap from the tree, which is present in even the tiniest amounts, can cause excruciating skin irritation. Keep your pets away from this plant!
What appears to be a cactus but isn’t one?
Cacti come in a variety of species. However, there are other plants that resemble cactus but are not actually cacti. This article will provide you with a list of plants that resemble cacti but are actually different species. This will assist you in choosing cacti and will provide general knowledge.
- Areoles are only found in cactus. Flowers and fruits sprout from these bumpy patches and spikes. A plant is not a cactus even if it has spines but no areoles.
- Spines are separate organs that are present in cacti. A cactus spine should break if you tug on it without pulling the skin (skin). Other plants have epidermis-born spines that, if pulled, will rip the skin.
- Cactus flowers are distinctive and only bloom for a week at most.
Plants that look like cacti, but aren’t:
- Aloe
- Yucca
- Haworthia
- Stapelia
- Pachypodium
- Agave
- Euphorbia
- Fouquieria splendens, often known as ocotillo
- Echeveria
- Gasteria
- Aizoaceae, or ice plants
- Huernia
- Lithops
Aloe
A succulent plant known as aloe resembles a cactus. This plant offers a number of health advantages, which makes it quite popular in medicine. Aloe comes in more than 450 different species.
Additionally, aloe has spikes on its stalks and blooms throughout the summer. It is a succulent once more, not a cactus. The most popular species is aloe vera.
Yucca
Yucca plants can be either shrubs or trees. These plants grow to be quite huge and have numerous leaves with various points. They generally thrive in cacti-like environments, and their pointed leaves give them the appearance of cacti. Similar to cactus, it is drought-resistant, requires little watering, and thrives in well-draining soil.
Haworthia
The Haworthia is a stunning succulent with thick, upward-growing leaves that frequently have little spikes on them. They are Southern African natives. They grow in rosettes of leaves.
Numerous Haworthia species have pointed leaf tips and sides as well as modest growth rates and extended lifespans. Some plants have leaves with a rough feel. The majority of Haworthia plants are tiny and look like aloe plants.
Stapelia
Beautiful succulent plants called stapelia are native to Africa. This plant also has blooms, and the flowers are typically an odd reddish-brown hue, shaped like a star, highly hairy, and odorous. The plant itself has thin, blunt spines on its leaves that resemble cacti. Although it is not a cactus, this plant is highly unusual.
Pachypodium
Succulent plants called Pachypodium grow as trees or bushes. They are incredibly unusual plants with strong trunks that can store water to withstand droughts. The top of Pachypodium contains leaves, and the trunk is frequently coated with spines.
The plant’s top has leaves and looks like a palm tree. The spines on this plant don’t regenerate and it grows very slowly. Even pachypodium produces huge white flowers 4-6 years after reaching its ideal size.
Agave
A plant in the genus of monocots known as agave, often known as the century plant, resembles cacti in certain ways. Tequila, sugar, and various medications are all made from specific agave species.
Large, thick leaves on these Agave plants grow vertically and frequently have a pointed tip. These plants are primarily found in South America in hot, arid regions where cacti are also found. They have an aloe-like appearance.
A group of plants known as euphorbia, often known as spurge, resemble cactus. There are numerous varieties of this plant, and the majority of them blossom and have spines. They don’t grow from areoles, but their spines resemble cacti’s quite closely.
In contrast to cactus, which typically feature big flowers, their blossoms are frequently modest. Furthermore, cacti don’t have latex in their stems, whereas euphorbia plants emit a white fluid that does. The euphorbia probably resembles cactus the most.
Ocotillo, or Fouquieria splendens
Although ocotillo resembles a cactus, it is not a true cactus. They go by several other names, including desert coral and Jacob’s cactus. Large plants called ocotillo have cactus-like spines on their leaves.
These plants can be found growing close to cactus in the Southwest of the United States and Mexico. The ocotillo plant resembles a stick because of its strong base and upward-growing stems with leaves that may be lacking. They bloom as well.
Echeveria
Despite not having a particularly cactus-like appearance, some people refer plants Echeveria as cacti. These are rosettes-forming stonecrop plants. They also blossom and flourish in rather arid circumstances.
They are frequently referred to as hens and chicks. This genus has a large number of plants, many of which grow in rosettes. Other plants, like those in the Sempervivum genus, also resemble hens and chicks.
Gasteria
People frequently mistake the succulent Gasteria for a cactus. This is so because Gasteria have large leaves with little spikes on them and a thick base. Most commonly found in South Africa, Gasteria can blossom and produce lovely, curled flowers.
Ice Plants, or Aizoaceae
A huge plant genus with more than 1600 species including ice plants. Some of them resemble Lithops, or stone plants, and others closely resemble the cactus Rhipsalis. They flourish in New Zealand and South Africa.
Huernia
Succulent plants belonging to the genus Huernia are found in Africa. These plants have tall stems with spikes on them and are very similar to Stapelia. They also have bell- or star-shaped blooms. Flowers are typically vibrant and have a variety of colors and textures.
Similar to Stapelia blooms, they frequently have a disagreeable odor. The plants resemble cactus a lot because of their spines. Particularly Huernia pillansii resembles a cactus in appearance.
Lithops, or Aizoaceae
Lithops are little stone plants that belong to the same family as ice plants. They are particularly unusual plants since they are tiny, rounded, and blossom. Living stones known as lithops are from southern Africa. You may learn more about Lithops care by reading our article, which is available here.