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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids I
Ordo: Malpighiales

Familia: Euphorbiaceae
Subfamiliae: Acalyphoideae – Cheilosoideae – Crotonoideae – Euphorbioideae
Genera incertae tribus: Afrotrewia – Karima – Radcliffea
Overview of genera

A

AcalyphaAcidocrotonAcidotonActinostemonAdeliaAdenochlaenaAdenoclineAdenopeltisAdenophaedraAdriana – Afrotrewia – Agrostistachys – Alchornea – Alchorneopsis – Aleurites – Algernonia – Alphandia – Amperea – Amyrea – Angostylis – Annesijoa – Anomostachys – Anthostema – Aparisthmium – Argomuellera – Argythamnia – Astrococcus – Avellanita
B

BalakataBaliospermumBaloghiaBenoistiaBernardia – Bertya – Beyeria – Blachia – Blumeodendron – Bocquillonia – Bonania – Borneodendron – Bossera – Botryophora – Brasiliocroton
C

Caelebogyne – Calycopeplus – CaperoniaCaryodendron – Cavacoa – Cephalocroton – Cephalocrotonopsis – Cephalomappa – Chaetocarpus – Cheilosa – Chiropetalum – Chlamydojatropha – Chondrostylis – Chrozophora – Cladogelonium – Cladogynos – Claoxylon – Claoxylopsis – Cleidiocarpon – Cleidion – Clonostylis – Clutia – Cnesmone – Cnidoscolus – Coccoceras – Cocconerion – CodiaeumColliguaja – Colobocarpos – Conceveiba – Conosapium – Cordemoya – Croton – Crotonogyne – Crotonogynopsis – Cubanthus – Cunuria – Cyrtogonone – Cyttaranthus
D

Dalechampia – Dalembertia – Dendrocousinsia – Dendrothrix – Deuteromallotus – Deutzianthus – Dichostemma – Discoclaoxylon – Discocleidion – Discoglypremna – Ditaxis – Ditrysinia – Ditta – Dodecastigma – Domohinea – Doryxylon – Droceloncia – Duvigneaudia – Dysopsis
E

Elaeophorbia – Elateriospermum – Endadenium – Endospermum – Enriquebeltrania – Epiprinus – Erismanthus – Erythrococca – EuphorbiaExcoecaria
F

Falconeria – Fontainea
G

Garcia – Garciadelia – Gavarretia – Givotia – Glycydendron – Gradyana – Grimmeodendron – Grossera – Gymnanthes
H

Haematostemon – Hamilcoa – Hancea – HeveaHippomaneHomalanthus – Homonoia – Hura – Hylandia
I

Incadendron
J

JatrophaJoannesia
K

Karima – Klaineanthus – Koilodepas
L

Lasiococca – Lasiocroton – Leeuwenbergia – Leidesia – Leucocroton – Lobanilia
M

Mabea – MacarangaMallotusManihot – Manniophyton – Maprounea – Mareya – Mareyopsis – Megistostigma – Melanolepis – Mercurialis – Micrandra – Micrandropsis – Micrococca – Microstachys – Mildbraedia – Moacroton – Monadenium – Monadelpha – Monotaxis – Moultonianthus – Myladenia – Myricanthe
N

Nealchornea – NecepsiaNeoboutonia – Neoguillauminia – Neoholstia – Neoscortechinia – Neoshirakia – Neotrewia
O

OctospermumOligocerasOmphaleaOphellantha – Ophthalmoblapton – Orfilea – Ostodes
P

Pachystroma – Pachystylidium – Pantadenia – Paracroton – Paranecepsia – Parapantadenia – Pausandra – Pedilanthus – Pera – Philyra – Pimelodendron – Plagiostyles – Platygyna – Pleradenophora – Plukenetia – Podadenia – Polyandra – Pseudagrostistachys – Pseudosenefeldera – Ptychopyxis – Pycnocoma
R

Radcliffea – Reutealis – Rhodothyrsus – Ricinocarpos – Ricinodendron – Ricinus – Rockinghamia – Romanoa
S

Sagotia – Sampantaea – Sandwithia – Sapium – Schinziophyton – Sclerocroton – Sebastiania – Seidelia – Senefeldera – Senefelderopsis – Shirakiopsis – Spathiostemon – Spegazziniophytum – Speranskia – Sphaerostylis – Sphyranthera – SpirostachysStillingia – Strophioblachia – Sumbaviopsis – Suregada – Symphyllia – Synadenium – Syndyophyllum
T

TannodiaTapoides – Tetrorchidium – Thyrsanthera – Tragia – Tragiella – Trewia – Triadica – Trigonopleura – Trigonostemon – Tritaxis – Tsaiodendron
V

VaupesiaVernicia
W

Weda – Wetria

Name

Euphorbiaceae Juss., Gen. Pl. 384–385. (1789) nom. cons.

Type species: Euphorbia L., Sp. Pl. 1: 450. (1753)

Synonyms

Cheilosaceae Doweld, Prosyllabus Tracheoph.: xxxi. (2001)
References

Jussieu, A.L. de 1789. Genera Plantarum 384–385. AS Euphorbiae
Govaerts, R. et al. 2021. Euphorbiaceae in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2021 June 23. Reference page.
International Plant Names Index. 2020. Euphorbiaceae. Published online. Accessed: Mar. 31 2020.
Stevens, P.F. 2001 onwards. Angiosperm Phylogeny Website. Version 14, July 2017 [and more or less continuously updated since]. Online. Reference page.
Sun, M., Naeem, R., Su, J.X., Cao, Z.Y., Burleigh, J.G., Soltis, P.S., Soltis, D.E. & Chen, Z.D. 2016. Phylogeny of the Rosidae: A dense taxon sampling analysis. Journal of Systematics and Evolution 54(4): 363–391. DOI: 10.1111/jse.12211 Open access Reference page.
Tropicos.org 2020. Euphorbiaceae. Missouri Botanical Garden. Published online. Accessed: 31 Mar. 2020.
Van Welzen, P.C. 2002. The correct interpretation of Euonymus auriculatus Craib (Celastraceae) and Myladenia serrata Airy Shaw (Euphorbiaceae). Natural History Bulletin of the Siam Society 50: 111–114. Full text Reference page.
USDA, ARS, Germplasm Resources Information Network. Euphorbiaceae in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service.
Webster, G.L. 1994. Synopsis of the genera and suprageneric taxa of Euphorbiaceae. Annals of the Missouri Botanical Garden 81(1): 33-144. DOI: 10.2307/2399909 JSTOR Reference page.
Webster, G.L. 2007. Taxonomic and nomenclatural changes in American Euphorbiaceae sensu lato. Contributions from the University of Michigan Herbarium 25: 235-239. PDF Reference page.
Webster, G.L. 2014. Euphorbiaceae. In: Kubitzki K., ed. The Families and Genera of Vascular Plants 11: Flowering Plants. Eudicots Malpighiales. Heidelberg, New York, Dordrecht, London: Springer, 51‒216. Reference page.
Wurdack, K. J. Hoffmann, P. & Chase, M. W. 2005. Molecular phylogenetic analysis of uniovulate Euphorbiaceae (Euphorbiaceae sensu stricto) using plastid RBCL and TRNL-F DNA sequences. American Journal of Botany 92: 1397. DOI: 10.3732/ajb.92.8.1397 Open access Reference page.

Vernacular names
العربية: فربيونية
azərbaycanca: Südləyənkimilər
беларуская: Малачайныя
български: Млечкови
català: Euforbiàcies
čeština: Pryšcovité
dansk: Vortemælk-familien
Deutsch: Wolfsmilchgewächse
Ελληνικά: Ευφορβίδες
English: Spurge family
Esperanto: Eŭforbiacoj
eesti: Piimalillelised
فارسی: فرفیونیان, تیره فرفریون
suomi: Tyräkkikasvit
français: Euphorbiacées
galego: Euforbiáceas
עברית: חלבלוביים
हिन्दी: एरण्ड कुल
hrvatski: Mlječikovke
hornjoserbsce: Mlóčenjowe rostliny
magyar: Kutyatejfélék
italiano: Euforbiacee
日本語: トウダイグサ科
ქართული: რძიანასებრნი
қазақша: Сүттіген тұқымдасы
перем коми: Эуфорбия котыр
한국어: 대극과
kurdî: Famîleya giyaşîrkan
коми: Эуфорбия котыр
lietuvių: Karpažoliniai
latviešu: Eiforbiju dzimta
македонски: Млечки
മലയാളം: യൂഫോർബിയേസീ
Nederlands: Wolfsmelkfamilie
norsk: Vortemelkfamilien
polski: Wilczomleczowate
português: Euforbiácea
Runa Simi: Wachanqa yura rikch'aq ayllu
русский: Молочайные
slovenčina: Prýštecovité
slovenščina: Mlečkovke
svenska: Törelväxter
தமிழ்: ஆமணக்குக் குடும்பம்
తెలుగు: యుఫోర్బియేసి
ไทย: วงศ์ยางพารา
Türkçe: Sütleğengiller
українська: Молочайні
oʻzbekcha/ўзбекча: Sutlamadoshlar
Tiếng Việt: Họ Đại kích
中文: 大戟科

The Euphorbiaceae, the spurge family, are a large family of flowering plants. In common English, they are sometimes called euphorbias,[2] which is also the name of a genus in the family. Most spurges, such as Euphorbia paralias, are herbs, but some, especially in the tropics, are shrubs or trees, such as Hevea brasiliensis. Some, such as Euphorbia canariensis,[3]: 206  are succulent and resemble cacti because of convergent evolution.[4] This family has a cosmopolitan distribution, with greatest diversity in the tropics. However, the Euphorbiaceae also have many species in nontropical areas of all continents except Antarctica.

Description
Cyathia of Euphorbia baylissii
Croton cultivar 'Petra'

The leaves are alternate, seldom opposite, with stipules. They are mainly simple, but where compound, are always palmate, never pinnate. Stipules may be reduced to hairs, glands, or spines, or in succulent species are sometimes absent.

The plants can be monoecious or dioecious. The radially symmetrical flowers are unisexual, with the male and female flowers usually on the same plant. As can be expected from such a large family, a wide variety exists in the structure of the flowers. The stamens (the male organs) number from one to 10 (or even more). The female flowers are hypogynous, that is, with superior ovaries.

The genera in tribe Euphorbieae, subtribe Euphorbiinae (Euphorbia and close relatives) show a highly specialized form of pseudanthium ("false flower" made up of several true flowers) called a cyathium. This is usually a small, cup-like involucre consisting of fused-together bracts and peripheral nectary glands, surrounding a ring of male flowers, each a single stamen. In the middle of the cyathium stands a female flower, a single pistil with branched stigmas. This whole arrangement resembles a single flower.

The fruit is usually a schizocarp, but sometimes a drupe. A typical schizocarp is the regma, a capsular fruit with three or more cells, each of which splits open explosively at maturity, scattering the small seeds.

The family contains a large variety of phytotoxins (toxic substances produced by plants), including diterpene esters, alkaloids, and cyanogenic glycosides (e.g. root tubers of cassava). The seeds of the castor oil plant Ricinus communis contain the highly toxic carbohydrate-binding protein ricin.[5]

A milky latex is a characteristic of the subfamilies Euphorbioideae and Crotonoideae, and the latex of the rubber tree Hevea brasiliensis is the primary source of natural rubber. The latex is poisonous in the Euphorbioideae, but innocuous in the Crotonoideae.[citation needed] White mangrove, also known as blind-your-eye mangrove latex (Excoecaria agallocha), causes blistering on contact and temporary blindness if it contacts the eyes, hence its name. Other common names are milky mangrove, buta buta (Malay), and gewa (Bangladesh). The latex of spurge was used as a laxative.

Recent[when?] molecular studies have shown that the enigmatic family Rafflesiaceae, which was only recently recognized to belong to order Malpighiales, is derived from within the Euphorbiaceae.[6]

Euphorbiaceae are monoecious and open pollinated and so self-incompatibility is rare - although it has been reported in the past apparently this was in error. It is confirmed to be absent or incomplete in herbaceous Chamaesyce by Ehrenfeld 1976, Hevea by Bouharmont 1962, and Manihot by Jennings 1963 and George & Shifriss 1967.[7]
Taxonomy
Main article: List of Euphorbiaceae genera

The family Euphorbiaceae is the fifth-largest flowering plant family[8] and has about 7,500 species[9] organised into 300 genera,[8] 37 tribes, and three subfamilies; Acalyphoideae,[8] Crotonoideae and Euphorbioideae.[10] Amongst the oldest fossils of the group include the permineralised fruit Euphorbiotheca deccanensis from the Intertrappean Beds of India, dating to the late Maastrichtian at the end of the Cretaceous, around 66 million years ago. [11]
Uses and toxicity

Some species of Euphorbiaceae have economic significance, such as cassava (Manihot esculenta), castor oil plant (Ricinus communis), Barbados nut (Jatropha curcas), and the Para rubber tree (Hevea brasiliensis). Many are grown as ornamental plants, such as poinsettia (Euphorbia pulcherrima) or garden croton (Codiaeum variegatum). Leafy spurge (Euphorbia esula) and Chinese tallow (Triadica sebifera) are invasive weeds in North America.[12]

The most dangerous Euphorbiaceae member is the castor oil plant (Ricinus communis L.) because of their ricin content in the seeds.

Although some species of the Euphorbiaceae have been used in traditional medicine,[13] as of 2019, there is no rigorous clinical evidence that euphorbia extracts are effective for treating any disease. Numerous Euphorbiaceae species are listed on the poisonous plant database of the US Food and Drug Administration mainly because of the toxic sap.[14]
Phytochemistry

Phytochemicals found in Euphorbiaceae species include diterpenoids, terpenoids, flavonoids, alkaloids, tannins, neriifolins (also found in oleander), cycloartenol, lectin, and taraxerol, among others.[13][15]
Vulnerability and presumed extinction

Some species are facing the risk of becoming extinct.[16][17] These include the Euphorbia species E. appariciana, E. attastoma, E. crossadenia,[18] and E. gymnoclada.
References

Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III". Botanical Journal of the Linnean Society. 161 (2): 105–121. doi:10.1111/j.1095-8339.2009.00996.x.
"Definition of EUPHORBIA". Merriam Webster Dictionary. Retrieved 2019-06-10.
Bramwell, D.; Bramwell, Z. (2001). Wild Flowers of the Canary Islands (2nd ed.). Madrid: Rueda. ISBN 978-8472071292.
Natasha Nguyen (2014). "Convergent evolution of cacti and euphorbias". Retrieved 31 March 2007.
Wedin GP, Neal JS, Everson GW, Krenzelok EP (May 1986). "Castor bean poisoning". The American Journal of Emergency Medicine. 4 (3): 259–261. doi:10.1016/0735-6757(86)90080-X. PMID 3964368.
Baum, David A.; Wurdack, Kenneth J.; Nickrent, Daniel L.; Latvis, Maribeth; Davis, Charles C. (2007-03-30). "Floral Gigantism in Rafflesiaceae". Science. 315 (5820): 1812. Bibcode:2007Sci...315.1812D. doi:10.1126/science.1135260. ISSN 0036-8075. PMID 17218493. S2CID 27620205.
Webster, G. L. (2014). "Euphorbiaceae". In Kubitzki, Klaus (ed.). The Families and Genera of Vascular Plants - Volume XI - Flowering Plants, Eudicots - Malpighiales. Heidelberg: Springer. pp. 51–216/x+331. ISBN 978-3-642-39416-4. OCLC 868922400. ISBN 978-3-642-39417-1. ISBN 3642394167.
Gillespie, Lynn J.; Armbruster, W. Scott (1997). "A Contribution to the Guianan Flora: Dalechampia, Haematostemon, Omphalea, Pera, Plukenetia, and Tragia (Euphorbiaceae) with Notes on Subfamily Acalyphoideae". Smithsonian Contributions to Botany (86): 6. doi:10.5479/si.0081024X.86. Retrieved 21 May 2018.
"The Plant list: Euphorbiaceae". Royal Botanic Gardens Edinburgh and Missouri Botanic Gardens. Retrieved 31 March 2017.
Gurcharan Singh (2004). Plants Systematics: An Integrated Approach. Enfield, N.H: Science Publishers. ISBN 1-57808-351-6.
Reback, Rachel G.; Kapgate, Dashrath K.; Wurdack, Ken; Manchester, Steven R. (2022-02-01). "Fruits of Euphorbiaceae from the Late Cretaceous Deccan Intertrappean Beds of India". International Journal of Plant Sciences. 183 (2): 128–138. doi:10.1086/717691. ISSN 1058-5893. S2CID 239507275.
Gucker, Corey L (2010). "Euphorbia esula". Fire Effects Information System, U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Retrieved 10 June 2019.
Mondal, Sumanta; Ghosh, Debjit (2016). "A complete profile on blind-your-eye mangrove Excoecaria Agallocha L. (Euphorbiaceae): Ethnobotany, phytochemistry, and pharmacological aspects". Pharmacognosy Reviews. 10 (20): 123–138. doi:10.4103/0973-7847.194049. PMC 5214557. PMID 28082796.
"FDA Poisonous Plant Database". US Food and Drug Administration. 2019. Retrieved 10 June 2019.
Mali, Prashant Y.; Panchal, Shital S. (2017). "Euphorbia neriifolia L.: Review on botany, ethnomedicinal uses, phytochemistry and biological activities". Asian Pacific Journal of Tropical Medicine. 10 (5): 430–438. doi:10.1016/j.apjtm.2017.05.003. ISSN 1995-7645. PMID 28647179.
Olson, Mark E.; Lomelí S., José A.; Cacho, N. Ivalú (2005). "Extinction threat in the Pedilanthus clade (Euphorbia, Euphorbiaceae), with special reference to the recently rediscovered E. conzattii (P. pulchellus)". American Journal of Botany. 92 (4): 634–641. doi:10.3732/ajb.92.4.634. ISSN 0002-9122. PMID 21652441.
Rønsted, Nina; Horn, James W.; Simonsen, Henrik Toft; Nilsson, Niclas; Grace, Olwen M.; Saslis-Lagoudakis, C. Haris; Ernst, Madeleine (2016-07-28). "Evolutionary prediction of medicinal properties in the genus Euphorbia L." Scientific Reports. 6: 30531. Bibcode:2016NatSR...630531E. doi:10.1038/srep30531. ISSN 2045-2322. PMC 4964329. PMID 27464466.
Zaya, David N.; Howe, Henry F. (2009). "The anomalous Kentucky coVeetree: megafaunal fruit sinking to extinction?". Oecologia. Oecologia: Springer-Verlag. 161 (2): 221–226. Bibcode:2009Oecol.161..221Z. CiteSeerX 10.1.1.536.3841. doi:10.1007/s00442-009-1372-3. PMID 19488788. S2CID 18015.

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