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| <span><b>Browse:</b></span> | | <span><b>Browse:</b></span> |
| <span>[[Portal:Science|Science]]</span> | | <span>[[Portal:Genetics|Genetics]]</span> |
| <span>·</span> | | <span>·</span> |
| <span>[[Portal:Genetics|Genetics]]</span> | | <span>[[Portal:Chemistry|Chemistry]]</span> |
| <span>·</span> | | <span>·</span> |
| <span>[[Portal:Ethnobotany|Ethnobotany]]</span> | | <span>[[Portal:Ethnobotany|Ethnobotany]]</span> |
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| <!-- INTRODUCTION SECTION --> | | <!-- INTRODUCTION --> |
| <div class="lw-box"> | | <div class="lw-box"> |
| <div class="lw-box__hd"> | | <div class="lw-box__hd"> |
| <div class="lw-box__title">Introduction</div> | | <div class="lw-box__title">Introduction</div> |
| <div class="lw-box__link">[[Cannabis botany]]</div> | | <div class="lw-box__link">[[Cannabis Botany]]</div> |
| </div> | | </div> |
| <div class="lw-box__bd"> | | <div class="lw-box__bd"> |
| <div class="lw-hero"> | | <div class="lw-hero"> |
| <div class="lw-hero__img"> | | <div class="lw-hero__img"> |
| [[File:Cannabis-field-flowering.jpg|frameless|800px|link=]] | | [[File:Cannabis-field-flowering.jpg|800px|link=]] |
| <div class="lw-hero__caption">Cannabis field at peak flowering, showing characteristic morphology and growth patterns</div> | | <div class="lw-hero__caption">Cannabis field at peak flowering, showing characteristic morphology and growth patterns</div> |
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| <div class="lw-hero__text"> | | <div class="lw-hero__text"> |
| <p>'''Cannabis botany''' examines the plant biology of ''Cannabis sativa'' L., covering morphology, physiology, reproductive biology, chemical ecology, and environmental adaptation. As one of humanity's oldest cultivated plants, cannabis exhibits remarkable diversity in growth patterns, chemical profiles, and ecological adaptations across traditional growing regions.</p> | | <p>'''Cannabis botany''' examines the plant biology of ''Cannabis sativa'' L., covering morphology, physiology, reproductive biology, chemical ecology and environmental adaptation. As one of humanity's oldest cultivated plants, cannabis exhibits remarkable diversity in growth patterns, chemical profiles and ecological adaptations across traditional growing regions.</p> |
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| <p>Cannabis is a dioecious annual herb in the family Cannabaceae, characterized by palmate leaves with serrated leaflets, pistillate and staminate flowers on separate plants, and dense resinous trichomes producing cannabinoids and terpenes. The species shows extraordinary morphological variation—from compact highland varieties adapted to short growing seasons to tall tropical cultivars flowering under equatorial photoperiods. Understanding this botanical diversity is essential for conservation, as traditional landrace populations face threats from enforcement, hybridization, and climate change.</p> | | <p>Cannabis is a [[Dioecy|dioecious]] annual herb in the family [[Cannabaceae]], characterized by palmate leaves with serrated leaflets, pistillate and staminate flowers on separate plants and dense resinous [[Trichome types|trichomes]] producing [[Cannabinoid profiles|cannabinoids]] and [[Terpene profiles|terpenes]]. The species shows extraordinary morphological variation, from compact highland varieties adapted to short growing seasons to tall tropical cultivars flowering under equatorial photoperiods.</p> |
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| <p>Key botanical themes include: photoperiod response and flowering triggers, trichome development and cannabinoid biosynthesis, root architecture and nutrient uptake, pollination ecology and seed development, and phenotypic plasticity across environments. Modern cannabis botany integrates classical morphological description with molecular genetics, phytochemistry, and population biology to document and preserve genetic diversity.</p> | | <p>Key botanical themes include [[Photoperiod response|photoperiod response]] and flowering triggers, [[Trichome development|trichome development]] and [[Resin|resin]] production, [[Phenotypic plasticity|phenotypic plasticity]] and [[Climate adaptation in cannabis|climate adaptation]], life cycle [[Phenology|phenology]] across climates and the relationship between environmental conditions and [[Chemotype|chemical profiles]].</p> |
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| <div style="float:right; margin:0 0 12px 12px; max-width:200px;"> | | |
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| | <p>'''[[Capitate-stalked trichomes]]''' are the primary site of cannabinoid and terpene biosynthesis in cannabis. These specialized epidermal structures feature a multicellular stalk topped by a secretory head composed of disc cells that synthesize and accumulate cannabinoids, terpenes and flavonoids in a subcuticular storage cavity. Trichome density varies dramatically between [[Landrace cannabis|landrace]] populations, correlating with environmental pressures such as UV radiation intensity, [[Herbivory and defence|herbivory]] pressure and water stress.</p> |
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| | <p>Highland varieties from regions like the Hindu Kush and Western Himalayas often display exceptionally dense trichome coverage with high [[Resin|resin]] production, reflecting [[Climate adaptation in cannabis|adaptation]] to intense solar radiation at high elevations. Lowland tropical varieties may show sparser but larger trichomes optimized for different environmental conditions. The chemical profile of trichome secretions also varies regionally: some populations produce predominantly THC, others CBD, while many landrace varieties maintain balanced [[Cannabinoid profiles|cannabinoid ratios]] reflecting thousands of years of selection for traditional uses.</p> |
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| | <p>([[Capitate-stalked trichomes|Full article...]])</p> |
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| [[File:Cannabis-trichome-macro.jpg|200px|link=]] | | [[File:Cannabis-trichome-macro.jpg|200px|link=]] |
| <div style="font-size:11px; color:#6b7280; margin-top:4px;">Capitate-stalked trichomes producing cannabinoid-rich resin</div> | | <div class="featured-img__caption">Capitate-stalked trichomes producing cannabinoid-rich resin</div> |
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| <p>'''Glandular trichomes''' are the primary site of cannabinoid and terpene biosynthesis in cannabis. These specialized epidermal structures occur in three main types: bulbous trichomes (10-15 μm), capitate-sessile trichomes (25-30 μm), and capitate-stalked trichomes (50-500 μm). The largest capitate-stalked trichomes feature a multicellular stalk topped by a secretory head composed of disc cells that synthesize and accumulate cannabinoids, terpenes, and flavonoids in a subcuticular storage cavity.</p>
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| <p>Trichome density varies dramatically between landrace populations, correlating with environmental pressures such as UV radiation, herbivory, and water stress. Highland varieties from regions like the Hindu Kush often display exceptionally dense trichome coverage, while lowland tropical varieties may show sparser but larger trichomes. The chemical profile of trichome secretions also varies regionally—some populations produce predominantly THC, others CBD, while many landrace varieties maintain balanced cannabinoid ratios reflecting their traditional uses. ([[Cannabis trichomes|Full article...]])</p>
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| <div class="lw-box__hd"> | | <div class="lw-box__hd"> |
| <div class="lw-box__title">Did you know...</div> | | <div class="lw-box__title">Did you know...</div> |
| <div class="lw-box__link">Facts</div> | | <div class="lw-box__link">Botanical facts</div> |
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| <div class="lw-box__bd"> | | <div class="lw-box__bd"> |
| <ul style="margin:0; padding-left:20px;"> | | <ul> |
| <li>...that cannabis plants can produce over 200 different terpene compounds, creating distinct regional "chemotypes" that traditional farmers recognize by scent?</li> | | <li>...that cannabis is one of the few [[Dioecy|dioecious]] annual crop plants, meaning every seed is the product of outcrossing between genetically distinct male and female parents?</li> |
| <li>...that some highland landrace varieties complete their entire lifecycle in as little as 75 days, while tropical sativas may require 20+ weeks of flowering?</li> | | <li>...that [[Pollination biology|wind-borne cannabis pollen]] has been documented travelling several kilometres, making genetic isolation of landrace populations from nearby hybrid crops extremely difficult?</li> |
| <li>...that cannabis seeds can remain viable in soil seed banks for over a decade, allowing population recovery after disturbance?</li> | | <li>...that some highland [[Autoflowering|autoflowering]] varieties complete their entire lifecycle in as little as '''75 days''', while equatorial sativas may require '''20+ weeks''' of flowering?</li> |
| <li>...that traditional fiber landraces can reach heights exceeding 5 meters with minimal branching, while drug cultivars remain compact and highly branched?</li> | | <li>...that cannabis exhibits extreme [[Phenotypic plasticity]], with genetically identical clones producing dramatically different [[Chemotype|chemotypes]] under different environmental conditions?</li> |
| <li>...that wild cannabis populations in Central Asia show greater genetic diversity than all cultivated varieties combined?</li> | | <li>...that the [[Resin|resin]] produced by cannabis trichomes likely evolved as a defence against UV radiation, herbivores and desiccation rather than for any purpose related to human use?</li> |
| <li>...that the number of leaflet fingers (typically 5-9) varies between regional populations and correlates with latitude?</li>
| | <li>...that [[Polyploidy|tetraploid]] cannabis populations have been documented growing at altitudes above 3,000 m in the Lahaul-Spiti cold desert of the Indian Himalayas?</li> |
| </ul> | | </ul> |
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| <div class="lw-box__bd"> | | <div class="lw-box__bd"> |
| [[File:Cannabis-leaf-morphology.jpg|frameless|800px|link=]] | | <div class="selected-picture"> |
| <div class="lw-hero__caption">Leaf morphology variation across landrace populations, showing differences in leaflet number, serration depth, and overall form</div> | | [[File:Cannabis-leaf-morphology.jpg|800px|link=]] |
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| | <div class="lw-hero__caption">[[Leaf morphology]] variation across landrace populations, showing differences in leaflet number, serration depth and overall form</div> |
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| '''Morphology & Structure'''
| | <dl> |
| : [[Plant architecture]] · [[Leaf morphology]] · [[Inflorescence structure]] · [[Root systems]] · [[Stem anatomy]] · [[Trichome types]] · [[Sexual dimorphism]]
| | <dt>Taxonomy & Classification</dt> |
| | <dd>[[Cannabis sativa]] · [[Cannabaceae]] · [[Cannabis taxonomy]] · [[Sativa vs Indica]] · [[NLD/BLD classification]] · [[Cannabis ruderalis]] · [[Cultivar]] · [[Landrace cannabis]] · [[Cannabis use types]] · [[Feral and ruderal cannabis]] · [[Phylogenetics of Cannabis]]</dd> |
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| | <dt>Plant Morphology</dt> |
| | <dd>[[Growth patterns]] · [[Branching morphology]] · [[Leaf morphology]] · [[Stem morphology]] · [[Seed morphology]] · [[Root architecture]] · [[Fiber morphology]]</dd> |
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| | <dt>Reproductive Biology</dt> |
| | <dd>[[Dioecy]] · [[Sex expression]] · [[Hermaphroditism]] · [[Pollination biology]] · [[Inflorescence morphology]] · [[Vegetative propagation]]</dd> |
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| '''Reproductive Biology'''
| | <dt>Life Cycle & Phenology</dt> |
| : [[Photoperiod response]] · [[Flowering triggers]] · [[Pollination ecology]] · [[Seed development]] · [[Dioecious reproduction]] · [[Hermaphroditism]] · [[Pollen dispersal]]
| | <dd>[[Cannabis life cycle]] · [[Photoperiod response]] · [[Autoflowering]] · [[Flowering time]] · [[Phenology]]</dd> |
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| '''Phytochemistry'''
| | <dt>Trichome Biology</dt> |
| : [[Cannabinoid biosynthesis]] · [[Terpene production]] · [[Flavonoids]] · [[Chemotypes]] · [[THC vs CBD pathways]] · [[Essential oils]] · [[Secondary metabolites]]
| | <dd>[[Resin]] · [[Capitate-stalked trichomes]] · [[Trichome types]] · [[Trichome development]]</dd> |
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| '''Growth & Development'''
| | <dt>Chemical Ecology</dt> |
| : [[Germination]] · [[Vegetative growth]] · [[Floral initiation]] · [[Senescence]] · [[Life cycle]] · [[Phenology]] · [[Developmental stages]]
| | <dd>[[Secondary metabolites]] · [[Chemotype]] · [[Cannabinoid profiles]] · [[Terpene profiles]]</dd> |
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| '''Environmental Adaptation'''
| | <dt>Ecology</dt> |
| : [[Climate adaptation]] · [[Photoperiod sensitivity]] · [[Altitude responses]] · [[Drought tolerance]] · [[Cold hardiness]] · [[Soil preferences]] · [[Nutrient uptake]]
| | <dd>[[Cannabis ecology]] · [[Herbivory and defence]] · [[Pathogens and disease]]</dd> |
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| '''Regional Diversity'''
| | <dt>Environmental Adaptation</dt> |
| : [[Tropical cultivars]] · [[Temperate varieties]] · [[Highland adaptations]] · [[Fiber types]] · [[Drug types]] · [[Wild populations]] · [[Feral cannabis]]
| | <dd>[[Phenotypic plasticity]] · [[Climate adaptation in cannabis]] · [[Abiotic stress tolerance]] · [[Epigenetics in cannabis]] · [[Soil adaptation]]</dd> |
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| '''Research Methods'''
| | <dt>Population Biology</dt> |
| : [[Field observation]] · [[Morphometric analysis]] · [[Chemical profiling]] · [[Genetic analysis]] · [[Herbarium specimens]] · [[Living collections]] · [[Documentation standards]]
| | <dd>[[Terroir in Cannabis]] · [[Polyploidy]] · [[Centre of origin]] · [[Gene pool]] · [[Genetic diversity]] · [[Local adaptation]] · [[Natural selection]] · [[Mass selection]] · [[Genetic drift]] · [[Gene flow]] · [[Introgression]] · [[Genetic contamination]] · [[Genetic erosion]]</dd> |
| | </dl> |
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| </div> | | </div> |
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| <div style="font-weight:600; margin-bottom:8px;">Help improve botany articles:</div> | | <div class="lw-kicker">Help improve botany articles</div> |
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| <ul style="margin:0; padding-left:20px;"> | | <ul class="lw-list"> |
| <li>'''Document morphology''': Add detailed plant descriptions with measurements</li> | | <li>'''Document morphology''': Add detailed plant descriptions with measurements to [[Growth patterns]], [[Leaf morphology]], [[Branching morphology]]</li> |
| <li>'''Upload field photos''': Share diagnostic images showing leaves, flowers, stems</li> | | <li>'''Upload field photos''': Share diagnostic images showing leaves, flowers, trichomes, habitat</li> |
| <li>'''Record phenology''': Document flowering times and seasonal patterns</li> | | <li>'''Record phenology''': Document [[Flowering time|flowering times]], seasonal patterns, life cycle events across growing regions</li> |
| <li>'''Describe chemotypes''': Add terpene profiles and cannabinoid ratios</li> | | <li>'''Describe chemotypes''': Add [[Terpene profiles|terpene profiles]], [[Cannabinoid profiles|cannabinoid ratios]], [[Chemotype|chemical variation]] data</li> |
| <li>'''Map distributions''': Record geographic ranges of landrace varieties</li> | | <li>'''Write new articles''': [[Dioecy]], [[Pollination biology]], [[Phenotypic plasticity]], [[Cannabis sativa]], [[Sativa vs Indica]]</li> |
| <li>'''Expand stubs''': [[Leaf serration]], [[Pistillate flowers]], [[Pollen viability]]</li>
| | <li>'''Expand stubs''': [[Cannabis ecology]], [[Resin]], [[Seed morphology]], [[Autoflowering]]</li> |
| <li>'''Create missing pages''': [[Trichome density]], [[Photoperiod ecotypes]], [[Seed morphology]]</li> | |
| </ul> | | </ul> |
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| <div style="display:grid; grid-template-columns:repeat(2, 1fr); gap:8px;"> | | <div class="portal-grid"> |
| <div>[[Portal:Genetics|Genetics]]</div> | | <div>[[Portal:Genetics|Genetics]]</div> |
| <div>[[Portal:Chemistry|Chemistry]]</div> | | <div>[[Portal:Chemistry|Chemistry]]</div> |
| <div>[[Portal:Ecology|Ecology]]</div>
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| <div>[[Portal:Cultivation|Cultivation]]</div> | | <div>[[Portal:Cultivation|Cultivation]]</div> |
| <div>[[Portal:Ethnobotany|Ethnobotany]]</div> | | <div>[[Portal:Ethnobotany|Ethnobotany]]</div> |
| <div>[[Portal:Conservation|Conservation]]</div> | | <div>[[Portal:Conservation|Conservation]]</div> |
| <div>[[Portal:Research|Research]]</div> | | <div>[[Portal:Research|Research]]</div> |
| <div>[[Portal:Landrace Types|Landrace Types]]</div> | | <div>[[Portal:Southeast Asia|Southeast Asia]]</div> |
| | <div>[[Portal:South Asia|South Asia]]</div> |
| </div> | | </div> |
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| [[Category:Plant morphology|Morphology]] · [[Category:Plant physiology|Physiology]] · [[Category:Reproductive biology|Reproduction]] · [[Category:Phytochemistry|Phytochemistry]] · [[Category:Cannabis anatomy|Anatomy]] · [[Category:Trichomes|Trichomes]] · [[Category:Flowering|Flowering]] · [[Category:Leaf structures|Leaves]] · [[Category:Root systems|Roots]] · [[Category:Environmental adaptation|Adaptation]] · [[Category:Regional varieties|Regional types]] · [[Category:Field methods|Field methods]] · [[Category:Botanical glossary|Glossary]] | | [[:Category:Botany|Botany]] · [[:Category:Cannabis Taxonomy|Taxonomy]] · [[:Category:Plant Morphology|Morphology]] · [[:Category:Reproductive Biology|Reproduction]] · [[:Category:Life Cycle and Phenology|Life Cycle]] · [[:Category:Trichome Biology|Trichomes]] · [[:Category:Chemical Ecology|Chemical Ecology]] · [[:Category:Cannabis Ecology|Ecology]] · [[:Category:Environmental Adaptation|Adaptation]] · [[:Category:Population Biology|Population Biology]] |
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