Coffea arabica
Enable an AI agent to recognise Coffea arabica, assess a plant's condition and reproductive potential, and select cultivation, propagation or conservation actions supported by its identity and local circumstances.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex + Grok
Purpose and description
Enable an AI agent to recognise Coffea arabica, assess a plant's condition and reproductive potential, and select cultivation, propagation or conservation actions supported by its identity and local circumstances.
Coffea arabica L. is a self-compatible allotetraploid (2n = 4x = 44) shrub in Rubiaceae, native to Afromontane forests of Ethiopia and South Sudan and formed from ancestral Coffea canephora and Coffea eugenioides, whose seeds are the principal cultivated source of mild (arabica) coffee.
It can be Inspect, photograph and sample specified organs to establish or revise identification.; Monitor growth, flowering, fruit cohorts and stress through repeat observations.; Select and evaluate irrigation, shade, nutrition or pruning changes against plant condition and local evidence.; Propagate from documented material using a method appropriate to the cultivar and intended genetic fidelity.; Assess suspected coffee leaf rust, berry damage or root problems and select further diagnosis or locally authorised management.; Select mature fruit for harvest or reproductive material for collection while retaining its link to the source plant..
Distinguishing features
Resolve an identification to the accepted botanical species Coffea arabica L.; a label saying only 'coffee' or 'Arabica' is a claim requiring supporting evidence. Taxonomic reference: [Kew Plants of the World Online](https://powo.science.kew.org/taxon/747038-1).
Apply a regional Coffea identification key to measured leaves, stipules, flowers and fruits; retain the character combination that separates the specimen from locally plausible alternatives rather than treating glossy leaves or coffee cherries as diagnostic.
When morphology or provenance is inconclusive, compare sampled tissue with authenticated Coffea reference material using a validated genetic identification method; record which alternatives the method can actually exclude.
On a grafted plant, identify scion and rootstock separately and record the tissue sampled; a result from roots cannot automatically establish the identity of the fruit-bearing canopy.
Separate species identity from cultivar and breeding ancestry: an Arabica cultivar name or reported introgression requires its own evidence and should not automatically create a separate species entry.
Scope
+ Species identification, identification uncertainty and distinction from other Coffea species.
+ Cultivar or accession identity, propagation history and scion-rootstock composition.
+ Vegetative growth, flowering, fruit development and reproductive capacity.
+ Plant exposure to growing conditions and observed responses.
+ Plant health, intervention eligibility and conservation-relevant provenance.
- Independent taxonomic models for Coffea canephora, Coffea eugenioides and other species.
- Farm operations, land ownership and plantation business performance.
- Complete soil, weather, irrigation-system and ecosystem models.
- Harvested coffee lots, fermentation, roasting, beverage preparation and sensory grading.
- Independent pathogen and pest biology models.
- Regional population assessments, protected-area management and germplasm collection administration.
Characteristics
- Species identification confidence
- unassessed | provisional | supported | conflicting Determines whether Arabica-specific care and propagation assumptions are justified.
- Cultivar or accession identity
- Named cultivar or accession reference, evidence and confidence; unknown permitted Arabica varieties differ in performance and adaptation, so species identity alone cannot determine management expectations. Reference: [World Coffee Research Arabica catalog](https://varieties.worldcoffeeresearch.org/arabica).
- Scion and rootstock identities
- Own-rooted | grafted | unknown, with separate component identities Keeps canopy identity, root responses and propagation decisions attached to the correct component.
- Propagation origin
- Seed | cutting | tissue culture | graft | unknown, with parent or donor references Supports traceability and assessment of whether descendants can preserve the intended cultivar.
- Growth and reproductive stages
- Seedling, juvenile or reproductive plant; concurrent bud, flower and fruit stages recorded by branch or cohort Prevents a single stage label from hiding different flowering and ripening cohorts.
- Canopy and bearing-branch condition
- Height in m; stem diameter in mm at a stated position; live bearing-branch count; defoliation in % Supports comparison of growth, crop-bearing capacity and recovery after pruning or injury.
- Growing-condition exposure
- Temperature in °C, relative humidity in %, light with stated method, soil moisture with stated method, each over a defined interval Connects stress and reproductive events to measured exposure rather than altitude or location alone.
- Root-zone condition
- pH with test method; drainage observations; rooting depth in cm; nutrient results with units and sampling date Provides evidence for assessing root restriction, water stress and nutritional intervention.
- Health burden
- Affected leaves, branches or fruits in % with sample size, symptom description and diagnostic confidence Distinguishes observed damage from an assumed cause and supports repeatable monitoring.
- Fruit load and maturity distribution
- Fruit count per stated sampling unit; maturity-class proportions in % using a cultivar-appropriate reference Supports harvest selection and interpretation of reproductive demand on the plant.
- Biological provenance
- Source population or nursery, accession, parent material, collection or acquisition event Separates wild-origin material from cultivated material and preserves evidence needed for conservation or breeding use.
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 28 questions.
Arabica identity and lineage Establish what biological material is present and how securely its species and cultivated identity are known.
Misidentification, uncertain cultivar labels and grafted components can lead to inappropriate care or propagation.
Species recognition
Evaluate specimen-level evidence against plausible Coffea alternatives.
Supported Arabica identification
Record the identification claim, examined organs, reference method and unresolved alternatives.
- Which observed character combination supports Coffea arabica, and which other Coffea species were explicitly excluded? definition
- What voucher, expert determination or validated assay supports the identification, and which plant tissue was examined? provenance
Cultivar and component lineage
Keep cultivar claims, breeding ancestry and graft components distinct from species identification.
Traceable plant composition
Record cultivar or accession claims and the origins of the canopy and root system.
- What evidence connects this plant to its stated cultivar, accession or breeding parents? provenance
- Is the plant own-rooted or grafted, and which identity and observations belong to each component? boundary
Growth, flowering and fruiting Represent the plant's architecture and overlapping reproductive cohorts.
Pruning, crop assessment and harvest decisions require branch-level and cohort-level evidence.
Vegetative and bearing structure
Assess the living canopy and branches available for current and subsequent growth.
Bearing canopy condition
Relate measured growth, leaf retention and bearing branches to pruning and damage history.
- What are the plant's size, live stem count, bearing-branch distribution and recent growth at the observation date? measurement
- Which branches could be pruned or retained given their condition, crop and documented response to earlier pruning? action
Reproductive cohorts
Track flowering events and their subsequent fruit development without assuming uniform maturity.
Flower-to-fruit progression
Record bud development, flowering, fruit set, loss and maturity by dated cohort.
- When did each observed cohort flower, and what proportion of sampled flowers developed retained fruit? measurement
- Which fruits meet a maturity criterion validated for this cultivar, and which should remain on the plant? action
Growing conditions and response Connect the plant's measured environment to its growth, stress and management options.
A generic Arabica growing range cannot substitute for cultivar, site and life-stage evidence.
Canopy exposure
Assess temperature, light and moisture exposure during relevant developmental periods.
Exposure-linked stress
Record the timing and duration of environmental exposure alongside observed plant responses.
- What temperature, light and humidity exposures coincided with leaf injury, wilting, flowering or fruit loss? measurement
- What local evidence supports adjusting shade or water supply for this cultivar and growth stage? action
Root water and nutrition
Assess the root zone and nutrient evidence before attributing poor growth to a deficiency.
Root-zone limitation
Distinguish insufficient water, poor aeration, restricted roots and suspected nutritional imbalance.
- What root inspection, drainage observations, soil tests and leaf analyses support the suspected limitation? measurement
- Which irrigation, drainage or nutrition adjustment is justified, and what plant response would demonstrate improvement? action
Arabica health and recovery Assess damage affecting the leaves, fruit, stems and roots and evaluate responses to intervention.
Coffee-specific threats require organ-level observations, diagnostic confidence and cultivar-aware interpretation.
Symptoms and causal evidence
Separate visible symptoms from confirmed pest, pathogen or environmental causes.
Diagnosed damage pattern
Record affected organs, severity, distribution and evidence for suspected causes such as coffee leaf rust or coffee berry borer.
- What fraction of a defined sample shows leaf lesions, defoliation, fruit entry holes, dieback or root damage? measurement
- What examination or diagnostic result supports each suspected cause, and what competing explanation remains? provenance
Intervention and reassessment
Choose a justified response and assess its effects on the plant.
Evidence-based health response
Connect monitoring, sanitation or treatment decisions to diagnosis, cultivar evidence and reproductive stage.
- Does the observed burden justify monitoring, sanitation, isolation or a locally authorised treatment? action
- At what interval and with which repeat measurements will recovery, continuing damage or treatment injury be assessed? measurement
Propagation and biological continuity Support reproduction and collection while preserving identity and provenance.
Producing another coffee plant does not by itself preserve a cultivar, accession or conservation lineage.
Propagation fitness and fidelity
Assess whether the source material and propagation method meet the intended biological outcome.
Suitable propagation material
Record donor condition, reproductive history and evidence that the selected method can preserve the desired identity.
- Is the objective species reproduction, cultivar fidelity or a controlled cross, and which propagation method supports it? action
- What donor, parentage, pollination and health evidence must accompany the seed or vegetative material? provenance
Origin and material transfer
Preserve the distinction between source plants, their biological origins and removed material.
Traceable collection and handoff
Link collection events to source plants and transfer detailed custody of detached material to the appropriate neighbouring model.
- What evidence establishes wild, cultivated or uncertain origin, and what collection restrictions apply to this accession? provenance
- When fruit, seed or cuttings leave the plant, which material record assumes custody while preserving the source-plant link? boundary
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Typica
- Bourbon
- Caturra
- Catuai
- Gesha (Geisha)
- SL28
- Mundo Novo
- Ethiopian landraces (heirloom)
- Which of these kinds and varieties hold for the sense of Coffea arabica this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Wikidata - Q47685 - Item for the species Coffea arabica.
- NCBI Taxonomy - 13443 - TaxId for Coffea arabica.
- ITIS TSN - 35191 - Taxonomic Serial Number for Coffea arabica L.
- Botanical name (ICN) - Coffea arabica L. - Linnaean binomial; Species Plantarum (1753).
- Harmonized System - 0901.11 (green, not decaffeinated); 0901 more generally - Coffee heading, not species-specific; covers arabica and other Coffea together.
- ICO trade groups - Colombian Milds | Other Milds | Brazilian Naturals - International Coffee Organization arabica market groups, not botanical taxa.
- Which of these identifiers and schemes hold for the sense of Coffea arabica this model covers, and on what evidence? provenance
Standards and regulation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- ISO 3509 Coffee and coffee products - Vocabulary (International Organization for Standardization)
- ISO 10470 Green coffee - Defect reference chart (ISO)
- ISO 4149 Green coffee - Olfactory and visual examination and determination of foreign matter and defects (ISO)
- International Coffee Agreement (International Coffee Organization)
- SCA Coffee Standards and cupping protocol (Specialty Coffee Association)
- Codex Alimentarius CXS 193, ochratoxin A provisions applying to coffee (FAO/WHO Codex Alimentarius Commission)
- EU pesticide maximum residue levels in coffee, Regulation (EC) No 396/2005 (European Union)
- National green-coffee classification rules, e.g. Brazil MAPA coffee classification instructions (Ministério da Agricultura e Pecuária)
- Which of these standards and regulation hold for the sense of Coffea arabica this model covers, and on what evidence? provenance
Real-world use
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Exported as green coffee lots on ICO-reported markets and specialty auctions, then roasted for filter, espresso, and capsule drinks.
- Grown as a highland cash crop, often under shade in smallholder garden or agroforestry systems (Ethiopia, Central America, East Africa).
- Processed as washed, natural, honey, or wet-hulled green coffee depending on origin.
- Used as the recurrent parent in breeding rust-resistant cultivars (including Catimor and Sarchimor introgression lines).
- Minor feedstock for soluble/instant coffee relative to Coffea canephora.
- Sold under geographic indications or origin names such as Jamaica Blue Mountain, Kona, and Ethiopian Yirgacheffe.
- Which of these real-world use hold for the sense of Coffea arabica this model covers, and on what evidence? provenance
Typical measurements
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Somatic chromosome number - 44 (2n = 4x = 44) - chromosomes
- Caffeine in green beans - 0.8-1.5 - % dry mass
- Commercial cultivation altitude - 1000-2000 - m
- Mean temperature of producing areas - 15-24 - °C
- Export moisture of green coffee - 10-12.5 - % wet basis
- Bean screen size - 14-19 - 1/64 inch
- Cherry-to-green-bean recovery - 18-22 (about 5:1 cherry:green) - % mass
- Green-coffee yield - 0.5-2.0 - t ha⁻¹ year⁻¹
- Which of these typical measurements hold for the sense of Coffea arabica this model covers, and on what evidence? provenance
Failure modes and hazards
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Coffee leaf rust (Hemileia vastatrix) causing defoliation and yield collapse, especially on Typica/Bourbon-derived stock.
- Coffee berry borer (Hypothenemus hampei) tunnelling and spoiling the seed.
- Coffee berry disease (Colletotrichum kahawae) on green cherry in East Africa.
- Frost kill of trees in southern Brazilian producing belts.
- Ochratoxin A from mould on slowly dried or rewetted cherry and green beans.
- Climate warming shrinking suitable cool-highland habitat for wild and cultivated arabica.
- Processing defects (overfermentation, stinkers, quakers) that fail green-coffee grading and cupping.
- Narrow genetic base of many commercial cultivars after the Typica/Bourbon bottleneck.
- Which of these failure modes and hazards hold for the sense of Coffea arabica this model covers, and on what evidence? provenance
Regional variation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Ethiopia: named by region and process (e.g. washed Yirgacheffe, natural Harrar) and grown as forest, garden, or plantation coffee rather than as a few named cultivars.
- Kenya: SL28/SL34 and later rust-resistant lines; lots graded AA/AB/PB by screen size and density.
- Colombia: almost entirely washed arabica; Excelso/Supremo commercial grades.
- Brazil: predominantly natural or pulped-natural lots from large farms, often Catuai or Mundo Novo.
- Indonesia (notably Sumatra): wet-hulled (giling basah) arabica with a distinctive green-bean appearance and cup.
- Yemen: historic dry-processed mocha from old Typica-related stock.
- Consuming markets: 'arabica' is the default specialty coffee in North America and northern Europe; many southern European espresso and soluble blends remain robusta-heavy.
- Which of these regional variation hold for the sense of Coffea arabica this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Coffea canephora (robusta) - Diploid (2n = 22), self-incompatible, typically ~2-2.5% caffeine versus ~1% in arabica; grown hotter and lower; cup is harsher. Field: larger, more wavy leaves and usually unshaded lowland plantings. Lab: caffeine assay, chromosome count, or DNA.
- Coffea liberica - Much larger leaves and fruit, more heat-tolerant, woody/smoky cup; not an allotetraploid arabica. Distinguished by morphology and taxonomy, not by roast appearance alone.
- Catimor / Sarchimor introgression cultivars - Look and are sold as arabica but carry Coffea canephora genome from HdT/Timor Hybrid. Pedigree, rust-resistance history, and molecular markers separate them from pure arabica lineages; field habit is not a reliable test.
- Green robusta beans in mixed or mislabelled lots - Robusta beans are generally rounder, paler, and have a straighter central cut; arabica is typically flatter/oval with a more sinuous groove. Confirm with caffeine content or DNA barcoding, not visual grading alone.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of Coffea arabica this model covers, and on what evidence? provenance
Sources
- Species Plantarum, vol. 1 - Carl Linnaeus, Laurentius Salvius (1753) - Original valid publication of the name Coffea arabica L.
- Plants of the World Online: Coffea arabica L. - Royal Botanic Gardens, Kew - Accepted botanical name, authorship, family placement, and native range.
- NCBI Taxonomy Browser: Coffea arabica - National Center for Biotechnology Information - Taxonomic identifier 13443 and placement among Coffea.
- Arabica Coffee Varieties catalog - World Coffee Research - Cultivars actually distinguished in producing countries (Typica, Bourbon, Caturra, Catuai, SL28, Gesha, Mundo Novo, and others).
- The impact of climate change on indigenous arabica coffee (Coffea arabica): predicting future trends and identifying priorities - Aaron P. Davis, Tadesse Woldemariam Gole, Susana Baena, Justin Moat, PLOS ONE (2012) - Wild origin in Ethiopia/South Sudan highlands and climate sensitivity of the species.
- ISO 3509, Coffee and coffee products - Vocabulary - International Organization for Standardization - Standard vocabulary distinguishing arabica coffee from other coffee products.
- Botanical and trade information on arabica coffee - International Coffee Organization - Commercial grouping of arabicas in international trade and the species' role as the main mild-coffee crop.
What the second pass must settle
- Which regional botanical keys and validated genetic assays provide reliable identification for juvenile, sterile or introgressed material?
- Which cultivar-specific environmental and nutritional thresholds are supported by field evidence for the intended region and production system?
- Which local diagnostic protocols and intervention thresholds should govern suspected leaf rust, berry borer and root disease?
- Which propagation and seed-handling protocols preserve viability and the intended genetic identity for the accessions being modelled?
- Does an existing Vercy world model already own this concept, and which neighbouring models own cultivars, seed lots and conservation accessions?