{
 "id": "epfjd636yb",
 "slug": "latex-epfjd636yb",
 "title": "Latex",
 "updated": "2026-10-21",
 "topic_path": [
  {
   "id": "life",
   "label": "Life and health",
   "api_url": "https://www.edgepedia.org/api/v1/topics/life"
  },
  {
   "id": "life.plants",
   "label": "Plants and algae",
   "api_url": "https://www.edgepedia.org/api/v1/topics/life.plants"
  },
  {
   "id": "life.plants.seed",
   "label": "Seed plants",
   "api_url": "https://www.edgepedia.org/api/v1/topics/life.plants.seed"
  },
  {
   "id": "life.plants.seed.other",
   "label": "Other flowering plants",
   "api_url": "https://www.edgepedia.org/api/v1/topics/life.plants.seed.other"
  },
  {
   "id": "life.plants.seed.other.rosids",
   "label": "Rosids",
   "api_url": "https://www.edgepedia.org/api/v1/topics/life.plants.seed.other.rosids"
  },
  {
   "id": "life.plants.seed.other.rosids.fabaceae",
   "label": "Fabaceae: legumes and the pea family",
   "api_url": "https://www.edgepedia.org/api/v1/topics/life.plants.seed.other.rosids.fabaceae"
  },
  {
   "id": "life.plants.seed.other.rosids.fabaceae.alpha-a-to-l",
   "label": "Titles A to L",
   "api_url": "https://www.edgepedia.org/api/v1/topics/life.plants.seed.other.rosids.fabaceae.alpha-a-to-l"
  },
  {
   "id": "life.plants.seed.other.rosids.fabaceae.alpha-a-to-l.alpha-di-to-l",
   "label": "Titles Di to L",
   "api_url": "https://www.edgepedia.org/api/v1/topics/life.plants.seed.other.rosids.fabaceae.alpha-a-to-l.alpha-di-to-l"
  }
 ],
 "geo": [
  {
   "id": "geo.latam.t1000.life",
   "label": "Latin America and the Caribbean · 1000 to 1799: Life and health",
   "api_url": "https://www.edgepedia.org/api/v1/geo/geo.latam.t1000.life",
   "path": [
    {
     "id": "geo.latam",
     "label": "Latin America and the Caribbean",
     "api_url": "https://www.edgepedia.org/api/v1/geo/geo.latam"
    },
    {
     "id": "geo.latam.t1000",
     "label": "Latin America and the Caribbean · 1000 to 1799",
     "api_url": "https://www.edgepedia.org/api/v1/geo/geo.latam.t1000"
    },
    {
     "id": "geo.latam.t1000.life",
     "label": "Life and health",
     "api_url": "https://www.edgepedia.org/api/v1/geo/geo.latam.t1000.life"
    }
   ]
  }
 ],
 "excerpt": "Plant latex: sticky milky emulsion from laticifers in about 10% of flowering plants, a defense against herbivores; source of natural rubber from Hevea brasiliensis.",
 "snippet": "Plant latex: sticky milky emulsion from laticifers in about 10% of flowering plants, a defense against herbivores; source of natural rubber from Hevea brasiliensis.",
 "node": "life.plants.seed.other.rosids.fabaceae.alpha-a-to-l.alpha-di-to-l",
 "markdown": "# Latex\n\n**Latex** is a sticky, often milky emulsion that exudes from specialized canals or cells of plants upon injury, distinct from ordinary sap in being more viscous and colloidal. It is produced by secretory structures called laticifers and occurs in roughly 10 percent of flowering plant species, with no known primary metabolic function; its best-supported role is defense against herbivorous insects<sup>[1](https://www.annualreviews.org/content/journals/10.1146/annurev.ecolsys.110308.120307?crawler=true&mimetype=application%2Fpdf)</sup>. The word comes from Latin *latex, -icis*, meaning a fluid or juice<sup>[2](https://www.mobot.org/mobot/latindict/keyDetail.aspx?keyWord=latex)</sup>.\n\n| Key fact | Detail |\n|---|---|\n| Definition | Sticky emulsion exuded on damage from specialized canals in about 10% of flowering plant species<sup>[1](https://www.annualreviews.org/content/journals/10.1146/annurev.ecolsys.110308.120307?crawler=true&mimetype=application%2Fpdf)</sup> |\n| Producing structures | Laticifers, secretory cells or interconnected cell systems permeating the plant body<sup>[3](https://academic.oup.com/aobpla/article/17/2/plaf006/8010612)</sup> |\n| Chemistry | Mainly terpenes, plus rubber, mucilage, phenolic compounds, alkaloids, cardenolides, starch grains, and proteins such as cysteine proteases<sup>[4](https://www.sciencedirect.com/science/chapter/bookseries/pii/S0065229619300795)</sup> |\n| Richest families | Apocynaceae, Euphorbiaceae, Moraceae, and Papaveraceae<sup>[3](https://academic.oup.com/aobpla/article/17/2/plaf006/8010612)</sup> |\n| Function | Defense against herbivores and pathogens, and wound healing; latex-deficient mutants are more susceptible to herbivores<sup>[5](https://www.sciencedirect.com/science/article/pii/S1369526621000960)</sup> |\n| Industrial use | Hevea brasiliensis latex is the source of natural rubber, essentially polyisoprene<sup>[6](https://www.larousse.fr/encyclopedie/divers/latex/65194)</sup> |\n| Extent | Laticiferous species recorded in more than 40 phylogenetically distant families, predominantly in tropical regions<sup>[7](https://link.springer.com/article/10.1007/s00709-026-02179-w)</sup> |\n\n## Occurrence and distribution\n\nA survey by the plant anatomist [Katherine Esau](https://www.edgepedia.org/katherine-esau), reported in a Durham thesis, counted latex in 12,500 species<sup>[8](https://core.ac.uk/download/pdf/9347991.pdf)</sup>. Latex-bearing plants appear across many families and growth forms, including herbaceous plants, lianas, shrubs, and trees<sup>[6](https://www.larousse.fr/encyclopedie/divers/latex/65194)</sup>. Within a single laticiferous family the chemical composition varies, and even within a genus there are usually species with and without laticifers<sup>[9](https://pmc.ncbi.nlm.nih.gov/articles/PMC5586393/)</sup>.\n\nThe families with the highest numbers of latex-producing species are [Apocynaceae](https://www.edgepedia.org/apocynaceae), Euphorbiaceae, Moraceae, and [Papaveraceae](https://www.edgepedia.org/papaveraceae)<sup>[3](https://academic.oup.com/aobpla/article/17/2/plaf006/8010612)</sup>. In [Asteraceae](https://www.edgepedia.org/asteraceae), one of the largest plant families with 1,620 genera and over 23,000 species, about 1,800 species are latex-producing<sup>[10](https://link.springer.com/article/10.1007/s44345-025-00008-w)</sup>.\n\n## Laticifers\n\nLatex is produced by laticifers, secretory structures composed of single or interconnected cells that form systems permeating the entire plant body<sup>[3](https://academic.oup.com/aobpla/article/17/2/plaf006/8010612)</sup>. Their expansion into tube shapes occurs through two mechanisms, cell fusion and intrusive growth, and the extent of intrusive growth is still being investigated<sup>[5](https://www.sciencedirect.com/science/article/pii/S1369526621000960)</sup>. Recent evidence suggests that independent clusters of laticifers may arise in different organs and tissues of a plant and then hold distinct chemical and biochemical contents<sup>[4](https://www.sciencedirect.com/science/chapter/bookseries/pii/S0065229619300795)</sup>.\n\nA 2025 anatomical study of the subfamily Acalyphoideae overturned a long-standing assumption. Acalyphoideae had traditionally been distinguished from the rest of [Euphorbiaceae](https://www.edgepedia.org/euphorbiaceae) by the absence of latex and laticifers, but analysis of 40 species in 10 genera found laticifers in all studied species, showing that these cells are present and common there and more widespread in Euphorbiaceae than previously known<sup>[11](https://pmc.ncbi.nlm.nih.gov/articles/PMC11954595/)</sup>. Kew's family treatment still notes that Euphorbiaceae latex is white or yellowish to red and absent in Acalyphoideae<sup>[12](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A30375178-2/general-information)</sup>.\n\n## Chemistry\n\nAll latices contain molecules in colloidal suspension, most often resins and hydrocarbons<sup>[6](https://www.larousse.fr/encyclopedie/divers/latex/65194)</sup>. Although the latex of different species consists mainly of terpenes, it also contains rubber, mucilage, phenolic compounds, alkaloids, and cardenolides; carbohydrates such as starch grains are present, and proteins such as cysteine proteases are common in the latex of some species<sup>[4](https://www.sciencedirect.com/science/chapter/bookseries/pii/S0065229619300795)</sup>.\n\nColor varies widely. Most plant latex is whitish or cream colored, but bloodroot has deep orange-red latex and some other members of the poppy family have lemon-yellow latex<sup>[13](https://en.wikisource.org/wiki/The_New_International_Encyclop%C3%A6dia/Latex)</sup>. Documented examples include milky white in the rubber tree (*Hevea brasiliensis*), pale yellow in *Ficus septica*, orange in *Ficus benguetensis*, and scarlet in the dragon's blood tree *Croton lechleri*<sup>[14](https://www.pnrjournal.com/index.php/home/article/download/5534/6720/6765)</sup>.\n\n## Defense against herbivores\n\nLatex has been strongly implicated in defense against herbivorous insects<sup>[1](https://www.annualreviews.org/content/journals/10.1146/annurev.ecolsys.110308.120307?crawler=true&mimetype=application%2Fpdf)</sup>. Mutant plants deficient in latex production show increased susceptibility to multiple herbivores, and metabolites and proteins concentrated in latex deter insect feeding in a variety of species, with proteases likely serving a general defensive role<sup>[5](https://www.sciencedirect.com/science/article/pii/S1369526621000960)</sup>.\n\nHerbivores that feed on latex-bearing plants typically evade the fluid by severing the laticifers, feeding intercellularly, or through physiological adaptations<sup>[1](https://www.annualreviews.org/content/journals/10.1146/annurev.ecolsys.110308.120307?crawler=true&mimetype=application%2Fpdf)</sup>. [Convergent evolution](https://www.edgepedia.org/convergent-evolution) appears to be widespread both in plants with latex and in the insects that exploit latex-bearing plants, and because latex shows phenotypic plasticity, heritability, and macroevolutionary lability, it serves as a model system for studying plant-herbivore interactions<sup>[1](https://www.annualreviews.org/content/journals/10.1146/annurev.ecolsys.110308.120307?crawler=true&mimetype=application%2Fpdf)</sup>.\n\nCoagulation speed is part of the defense. Species of *Campanula* coagulate their latex in 10 seconds or less, and a pressure-chamber test showed *Campanula* latex coagulating at 8 bar, a pressure at which coagulation in *Ficus benjamina*, described as having a mechanism similar to *Hevea*, has been reported to be impaired<sup>[15](https://pmc.ncbi.nlm.nih.gov/articles/PMC12120442/)</sup>.\n\n## Evolution and diversification\n\nBecause latex is a highly convergent trait, it has been hypothesized to have evolved independently several times as a defense system improving plant fitness in the presence of herbivores<sup>[9](https://pmc.ncbi.nlm.nih.gov/articles/PMC5586393/)</sup>. An earlier hypothesis held that latex and resin canals drove species diversification through escape-and-radiate coevolution, but a 2019 re-examination by Foisy and colleagues found no longer strong evidence that latex or resin canals are general, consistently replicable drivers of species diversity across plants, while confirming that both are potent defenses and model traits for studying plant-herbivore interactions<sup>[16](https://besjournals.onlinelibrary.wiley.com/doi/10.1111/1365-2745.13203)</sup>.\n\n## Uses\n\nThe dominant industrial use is natural rubber from *Hevea brasiliensis*, in whose latex rubber is present in the laticifer cytoplasm; the latex coagulates naturally on leaving the plant or by the addition of acid, and rubber itself is essentially polyisoprene<sup>[6](https://www.larousse.fr/encyclopedie/divers/latex/65194)</sup>. Other latex plants are classified by their products: rubber (hevea, parthenium, landolphia), gutta-percha (*Palaquium*), balata (*Mimusops*), and alkaloids (poppy)<sup>[6](https://www.larousse.fr/encyclopedie/divers/latex/65194)</sup>. Nearly chemical-free natural plant latex is also used in manufacturing natural latex mattresses, beauty application pads, and cushioning<sup>[17](https://www.botanyjournals.com/assets/archives/2020/vol5issue6/5-6-27-292.pdf)</sup>, and medicinal plant latex is a reservoir of antimicrobial peptides, proteins, and enzymes for drug discovery<sup>[10](https://link.springer.com/article/10.1007/s44345-025-00008-w)</sup>.\n\n## References\n\n1. [Agrawal, A. A. & Konno, K. (2009). Latex: A Model for Understanding Mechanisms, Ecology, and Evolution of Plant Defense Against Herbivory. Annual Review of Ecology, Evolution, and Systematics 40: 311-331.](https://www.annualreviews.org/content/journals/10.1146/annurev.ecolsys.110308.120307?crawler=true&mimetype=application%2Fpdf)\n2. [Latex, A Grammatical Dictionary of Botanical Latin, Missouri Botanical Garden](https://www.mobot.org/mobot/latindict/keyDetail.aspx?keyWord=latex)\n3. [Laticifers are present in Acalyphoideae after all, AoB PLANTS (2025)](https://academic.oup.com/aobpla/article/17/2/plaf006/8010612)\n4. [Plant latex and latex-borne defense, Advances in Botanical Research, ScienceDirect](https://www.sciencedirect.com/science/chapter/bookseries/pii/S0065229619300795)\n5. [Growing a glue factory: Open questions in laticifer development, ScienceDirect](https://www.sciencedirect.com/science/article/pii/S1369526621000960)\n6. [latex, Larousse Encyclopedia (French)](https://www.larousse.fr/encyclopedie/divers/latex/65194)\n7. [New insights into laticifers in Mimosa caesalpiniifolia Benth. (Fabaceae), Protoplasma (2026)](https://link.springer.com/article/10.1007/s00709-026-02179-w)\n8. [Durham E-Thesis citing Esau (1965) survey of latex-bearing species](https://core.ac.uk/download/pdf/9347991.pdf)\n9. [Multiple facets of laticifer cells, PMC](https://pmc.ncbi.nlm.nih.gov/articles/PMC5586393/)\n10. [Latex of medicinal plants: a reservoir of antimicrobial peptides, proteins, and enzymes for drug discovery, Discover Molecules (2025)](https://link.springer.com/article/10.1007/s44345-025-00008-w)\n11. [Laticifers are present in Acalyphoideae after all: new insights from leaf anatomy, PMC](https://pmc.ncbi.nlm.nih.gov/articles/PMC11954595/)\n12. [Euphorbiaceae Juss., Plants of the World Online, Kew Science](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A30375178-2/general-information)\n13. [Latex, The New International Encyclopædia, Wikisource](https://en.wikisource.org/wiki/The_New_International_Encyclop%C3%A6dia/Latex)\n14. [Plant latex: phytochemistry, medicinal uses, PNR Journal](https://www.pnrjournal.com/index.php/home/article/download/5534/6720/6765)\n15. [Toward understanding the fast latex coagulation in Campanula spp., PMC](https://pmc.ncbi.nlm.nih.gov/articles/PMC12120442/)\n16. [Foisy, M. et al. (2019). Do latex and resin canals spur plant diversification? Journal of Ecology](https://besjournals.onlinelibrary.wiley.com/doi/10.1111/1365-2745.13203)\n17. [Uses of plant latex, International Journal of Botany Studies (2020)](https://www.botanyjournals.com/assets/archives/2020/vol5issue6/5-6-27-292.pdf)\n\n---\n*Topic: Encyclopedia › Life and health › Plants and algae › Seed plants › Other flowering plants › Rosids › Fabaceae: legumes and the pea family › Titles A to L › Titles Di to L*\n\n*Initially written Sep 17, 2026 · Reviewed: Sep 19, 2026; Oct 21, 2026 · Edited: Oct 15, 2026; Oct 21, 2026 · Last review: Oct 21, 2026*\n\n*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*\n\nLicense: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license\n",
 "same_as": [],
 "url": "https://www.edgepedia.org/latex-epfjd636yb",
 "markdown_url": "https://www.edgepedia.org/latex-epfjd636yb.md",
 "license": {
  "name": "Edgepedia Community License 1.0",
  "url": "https://www.edgepedia.org/edgepedia/license",
  "summary": "Free with credit, commercial use included. AI training is open to everyone. For other uses, organizations over USD 100M in revenue or 100M monthly users license separately.",
  "spdx": "LicenseRef-Edgepedia-Community-1.0"
 },
 "credit": "\"Latex\", Edgepedia (EdgeChat), https://www.edgepedia.org/latex-epfjd636yb. Edgepedia Community License 1.0.",
 "credit_md": "\"[Latex](https://www.edgepedia.org/latex-epfjd636yb)\", Edgepedia (EdgeChat), [https://www.edgepedia.org/latex-epfjd636yb](https://www.edgepedia.org/latex-epfjd636yb). [Edgepedia Community License 1.0](https://www.edgepedia.org/edgepedia/license).",
 "credit_html": "\"<a href=\"https://www.edgepedia.org/latex-epfjd636yb\">Latex</a>\", Edgepedia (EdgeChat), <a href=\"https://www.edgepedia.org/latex-epfjd636yb\">https://www.edgepedia.org/latex-epfjd636yb</a>. <a href=\"https://www.edgepedia.org/edgepedia/license\">Edgepedia Community License 1.0</a>.",
 "speakable": "Plant latex: sticky milky emulsion from laticifers in about 10% of flowering plants, a defense against herbivores; source of natural rubber from Hevea brasiliensis."
}