Euphorbia lactea


Succulentopedia

Euphorbia lactea 'White Ghost' (White Ghost Candelabra Spurge)

Euphorbia lactea 'White Ghost' (White Ghost Candelabra Spurge) is a striking and very popular cultivar of Euphorbia lactea. It grows up to…


Care for Euphorbia Lactea

After planting the mottled spurge, you will have to consider the care tips if you want your plant to blossom.

Soil and fertilizer

The Mottled spurge needs a semi-strong fertilizer but not in all seasons. The best season when you can apply fertilizer is from spring to fall.

The plant is feeding during seasons. You don’t need a nitrogen-rich fertilizer, because it may burn the roots. The soil type that will be suitable for the houseplant is a well-draining soil. Sandy soils or even the cacti mix are the best.

Sunlight and water

The plant will do well in full sun to partial shade. You can grow indoors, but you must ensure that it gets sufficient light.

You can locate it close to a window that receives light. Water is essential, but not in large amounts. You won’t be watering it every often but rather in summers and springs but in small doses.

Humidity and temperature

The Euphorbia Lactea is a real succulent and will not tolerate high humid conditions. Make sure that it is a low humid region or else you will be forced to grow it indoors in high humid seasons. Extreme cold does not favor the growth, though it may not also survive high temperatures.

Repotting

The plant is tall, but does not have heavy roots. The plant is rarely root-bound and therefore. You will gently remove it from the pot, then get rid of all soil through dusting.

You will then transfer it to a new, bigger pot with fresh soil. The soil-property where you will be repotting it will be dry and well-draining.


Contents

  • 1 Misidentification as cacti
  • 2 Etymology
  • 3 Description
    • 3.1 Inflorescence and fruit
    • 3.2 Xerophytes and succulents
    • 3.3 Irritants
    • 3.4 Uses
  • 4 Systematics and taxonomy
    • 4.1 Selected species
    • 4.2 Hybrids
    • 4.3 Subgenera
  • 5 References
  • 6 Further reading
  • 7 External links

Among laypeople, Euphorbia species are among the plant taxa most commonly confused with cacti, especially the stem succulents. [10] Euphorbias secrete a sticky, milky-white fluid with latex, but cacti do not. [10] Individual flowers of euphorbias are usually tiny and nondescript (although structures around the individual flowers may not be), without petals and sepals, unlike cacti, which often have fantastically showy flowers. [10] Euphorbias from desert habitats with growth forms similar to cacti have thorns, which are different from the spines of cacti. [10]

The common name "spurge" derives from the Middle English/Old French espurge ("to purge"), due to the use of the plant's sap as a purgative. The botanical name Euphorbia derives from Euphorbos, the Greek physician of King Juba II of Numidia (52–50 BC – 23 AD), who married the daughter of Anthony and Cleopatra. [11] Juba was a prolific writer on various subjects, including natural history. Euphorbos wrote that one of the cactus-like euphorbias (now called Euphorbia obtusifolia ssp. regis-jubae) was used as a powerful laxative. [11] In 12 BC, Juba named this plant after his physician Euphorbos, as Augustus Caesar had dedicated a statue to the brother of Euphorbos, Antonius Musa, who was the personal physician of Augustus. [11] In 1753, botanist and taxonomist Carl Linnaeus assigned the name Euphorbia to the entire genus in the physician's honor. [12]

The plants are annual, biennial or perennial herbs, woody shrubs, or trees with a caustic, poisonous milky latex. The roots are fine or thick and fleshy or tuberous. Many species are more or less succulent, thorny, or unarmed. The main stem and mostly also the side arms of the succulent species are thick and fleshy, 15–91 cm (6–36 in) tall. The deciduous [ citation needed ] leaves may be opposite, alternate, or in whorls. In succulent species, the leaves are mostly small and short-lived. The stipules are mostly small, partly transformed into spines or glands, or missing.

Inflorescence and fruit Edit

Like all members of the family Euphorbiaceae, spurges have unisexual flowers.

In Euphorbia, flowers occur in a head, called the cyathium (plural cyathia). Each male or female flower in the cyathium head has only its essential sexual part, in males the stamen, and in females the pistil. The flowers do not have sepals, petals, or nectar to attract pollinators, although other nonflower parts of the plant have an appearance and nectar glands with similar roles. Euphorbias are the only plants known to have this kind of flower head. [13]

Nectar glands and nectar that attract pollinators are held in the involucre, a cup-like part below and supporting the cyathium head. The "involucre" in the genus Euphorbia is not to be confused with the "involucre" in family Asteraceae members, which is a collection of bracts called phyllaries, which surround and encase the unopened flower head, then support the receptacle under it after the flower head opens.

The involucre is above and supported by bract-like modified leaf structures (usually in pairs) [ citation needed ] called cyathophylls', or cyathial leaves. The cyathophyll often has a superficial appearance of being petals of a flower.

Euphorbia flowers are tiny, and the variation attracting different pollinators, with different forms and colors occurs, in the cyathium, involucre, cyathophyll, or additional parts such as glands that attached to these.

The collection of many flowers may be shaped and arranged to appear collectively as a single individual flower, sometimes called a pseudanthium in the Asteraceae, and also in Euphorbia.

The majority of species are monoecious (bearing male and female flowers on the same plant), although some are dioecious with male and female flowers occurring on different plants. It is not unusual for the central cyathia of a cyme to be purely male, and for lateral cyathia to carry both sexes. Sometimes, young plants or those growing under unfavorable conditions are male only, and only produce female flowers in the cyathia with maturity or as growing conditions improve. [ citation needed ]

The female flowers reduced to a single pistil usually split into three parts, often with two stigmas at each tip. [ citation needed ] Male flowers often have anthers in twos. [ citation needed ] Nectar glands usually occur in fives, [14] may be as few as one, [14] and may be fused into a "U" shape. [13] The cyathophylls often occur in twos, are leaf-like, and may be showy and brightly coloured and attractive to pollinators, or be reduced to barely visible tiny scales. [ citation needed ]

The fruits are three- or rarely two-compartment capsules, sometimes fleshy, but almost always ripening to a woody container that then splits open, sometimes explosively. The seeds are four-angled, oval, or spherical, and some species have a caruncle. [ citation needed ]

Xerophytes and succulents Edit

In the genus Euphorbia, succulence in the species has often evolved divergently and to differing degrees. Sometimes, it is difficult to decide, and is a question of interpretation, whether or not a species is really succulent or "only" xerophytic. In some cases, especially with geophytes, plants closely related to the succulents are normal herbs. About 850 species are succulent in the strictest sense. If one includes slightly succulent and xerophytic species, this figure rises to about 1000, representing about 45% of all Euphorbia species.

Irritants Edit

The milky sap of spurges (called "latex") evolved as a deterrent to herbivores. It is white, and transparent when dry, except in E. abdelkuri, where it is yellow. The pressurized sap seeps from the slightest wound and congeals after a few minutes in air. The skin-irritating and caustic effects are largely caused by varying amounts of diterpenes. Triterpenes such as betulin and corresponding esters are other major components of the latex. [15] In contact with mucous membranes (eyes, nose, mouth), the latex can produce extremely painful inflammation. The sap has also been known to cause mild to extreme Keratouveitis, which affects vision. [16] Therefore, spurges should be handled with caution and kept away from children and pets. Wearing eye protection while working in close contact with Euphorbia is advised. [16] Latex on skin should be washed off immediately and thoroughly. Congealed latex is insoluble in water, but can be removed with an emulsifier such as milk or soap. A physician should be consulted if inflammation occurs, as severe eye damage including permanent blindness may result from exposure to the sap. [17]

The poisonous qualities were well known: in the Ethiopian Kebra Nagast, the serpent king Arwe is killed with juice from the Euphorbia. [18]

Uses Edit

Several spurges are grown as garden plants, among them poinsettia (E. pulcherrima) and the succulent E. trigona. E. pekinensis (Chinese: 大戟 pinyin: dàjǐ ) is used in traditional Chinese medicine, where it is regarded as one of the 50 fundamental herbs. Several Euphorbia species are used as food plants by the larvae of some Lepidoptera (butterflies and moths), like the spurge hawkmoths (Hyles euphorbiae and Hyles tithymali), as well as the giant leopard moth.

Euphorbias are often used as hedging plants in many parts of Africa. [19]

The present taxon "Euphorbia" corresponds to its own former subtribe, the Euphorbiinae. [ citation needed ] It has over 2000 species. [4] Morphological description using the presence of a cyathium (see section above) is consistent with nuclear and chloroplast DNA sequence data in testing of about 10% of its members. This testing supports inclusion of formerly other genera as being best placed in this single genus, including Chamaesyce, Monadenium, Pedilanthus, and poinsettia (E. pulcherrima).

Genetic tests have shown that similar flower head structures or forms within the genus, might not mean close ancestry within the genus. The genetic data show that within the genus, convergent evolution of inflorescence structures may be from ancestral subunits that are not related. So using morphology within the genus becomes problematic for further subgeneric grouping. As stated on the Euphorbia Planetary Biodiversity Inventory project webpage: [4]

Previous morphologically based delimitations of subgenera or sections within the genus should not be taken at face value. The genus is in fact rife with striking examples of morphological convergence in cyathial and vegetative features, which justifies a global approach to studying the genus to obtain a proper phylogenetic understanding of the whole group. The bottom line is that a number of clades have been placed inside or outside of Euphorbia at different times. few of the subgeneric circumscriptions hold up under DNA sequence analysis.

According to a 2002 publication on studies of DNA sequence data, [20] [21] [22] most of the smaller "satellite genera" around the huge genus Euphorbia nest deep within the latter. Consequently, these taxa, namely the never generally accepted genus Chamaesyce, as well as the smaller genera Cubanthus, [23] Elaeophorbia, Endadenium, Monadenium, Synadenium, and Pedilanthus were transferred to Euphorbia. The entire subtribe Euphorbiinae now consists solely of the genus Euphorbia.

Selected species Edit

  • Euphorbia albomarginata – rattlesnake weed, white-margined sandmat
  • Euphorbia amygdaloides – wood spurge
  • Euphorbia antisyphilitica – candelilla
  • Euphorbia backeri
  • Euphorbia balsamifera – sweet tabaiba (Canary Islands) [24]
  • Euphorbia bulbispina
  • Euphorbia canariensis – Canary Island spurge, Hercules club (Canary Islands) [25]
  • Euphorbia caput-medusae – Medusa's head (South Africa)
  • Euphorbia ceratocarpa – (Sicily and southern Italy)
  • Euphorbia characias – Mediterranean spurge
  • Euphorbia coerulescens - blue euphorbia [26]
  • Euphorbia cotinifolia – copper tree
  • Euphorbia cyathophora – fire-on-the-mountain
  • Euphorbia cyparissias – Cypress spurge
  • Euphorbia decidua
  • Euphorbia dendroides – tree spurge
  • Euphorbia epithymoides – cushion spurge
  • Euphorbia esula – leafy spurge
  • Euphorbia franckiana
  • Euphorbia fulgens – scarlet plume
  • Euphorbia grandicornis – cow's horn
  • Euphorbia grantii – African milk bush
  • Euphorbia gregersenii – Gregersen's spurge
  • Euphorbia griffithii – Griffith's spurge
  • Euphorbia helioscopia – sun spurge
  • Euphorbia heterophylla – painted euphorbia, desert poinsettia, fireplant, paint leaf, kaliko
  • Euphorbia hirta – asthma-plant
  • Euphorbia hispida
  • Euphorbia horrida – African milk barrel
  • Euphorbia ingens – candelabra tree
  • Euphorbia labatii
  • Euphorbia lactea – mottled spurge, frilled fan, elkhorn
  • Euphorbia lathyris – caper spurge, paper spurge, gopher spurge, gopher plant, mole plant
  • Euphorbia leuconeura – Madagascar jewel
  • Euphorbia maculata – spotted spurge, prostrate spurge
  • Euphorbia marginata – snow on the mountain
  • Euphorbia mammillaris
  • Euphorbia maritae
  • Euphorbia milii – crown-of-thorns, Christ plant
  • Euphorbia misera – cliff spurge, Baja California, Southern California
  • Euphorbia myrsinites – myrtle spurge, creeping spurge, donkey tail
  • Euphorbia obesa
  • Euphorbia paralias – sea spurge
  • Euphorbia pekinensis – Peking spurge
  • Euphorbia peplis – purple spurge
  • Euphorbia peplus – petty spurge
  • Euphorbia polychroma – bonfire
  • Euphorbia psammogeton – sand spurge
  • Euphorbia pulcherrima – poinsettia, Mexican flame leaf, Christmas star, winter rose, noche buena, lalupatae, pascua, Atatürk çiçeği (Turkish)
  • Euphorbia purpurea – Darlington's glade spurge, glade spurge, or purple spurge
  • Euphorbia resinifera – resin spurge
  • Euphorbia rigida – gopher spurge, upright myrtle spurge
  • Euphorbia serrata – serrated spurge, sawtooth spurge
  • Euphorbia tirucalli – Indian tree spurge, milk bush, pencil tree, firestick
  • Euphorbia tithymaloides – devil's backbone, redbird cactus, cimora misha (Peru)
  • Euphorbia trigona – African milk tree, cathedral cactus, Abyssinian euphorbia
  • Euphorbia tuberosa
  • Euphorbia virosa – gifboom or poison tree

Hybrids Edit

Euphorbia has been extensively hybridised for garden use, with many cultivars available commercially. Moreover, some hybrid plants have been found growing in the wild, for instance E. × martini Rouy, [27] a cross of E. amygdaloides × E. characias subsp. characias, found in southern France.

Subgenera Edit

The genus Euphorbia is one of the largest and most complex genera of flowering plants, and several botanists have made unsuccessful attempts to subdivide the genus into numerous smaller genera. According to the recent phylogenetic studies, [20] [21] [22] Euphorbia can be divided into four subgenera, each containing several sections and groups. Of these, subgenus Esula is the most basal. The subgenera Chamaesyce and Euphorbia are probably sister taxa, but very closely related to subgenus Rhizanthium. Extensive xeromorph adaptations in all probability evolved several times it is not known if the common ancestor of the cactus-like Rhizanthium and Euphorbia lineages had been xeromorphic—in which case a more normal morphology would have re-evolved namely in Chamaesyce—or whether extensive xeromorphism is entirely polyphyletic even to the level of the subgenera.

Wood spurge
Euphorbia amygdaloides


Euphorbia Lactea Features: An Overview

A basic overview of mottled spurge is as follows:

  • Can grow in full sun to partial shade
  • If offered enough light, it can be successfully grown indoors
  • Requires dense amount of water in small doses.
  • Can grow up to 16 feet tall outdoors and 2 feet high in a container
  • Can grow as much as 24 inches or 2 feet wide
  • It is not a cold-hardy plant
  • Grafting can be used for propagation

All features of the Euphorbia Lactea – from the leaves to the thorns – naturally produce a latex-like substance that is milky in consistency and may be poisonous to people and animals.


Watch the video: Two Very Different Euphorbias and What They Do


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