Citrus reticulata
Enable an AI agent to recognise a candidate Citrus reticulata plant, assess its condition and reproductive state, and choose evidence-supported identification, care, propagation or harvest actions.
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 a candidate Citrus reticulata plant, assess its condition and reproductive state, and choose evidence-supported identification, care, propagation or harvest actions.
Citrus reticulata Blanco is a small-fruited, typically loose-skinned diploid species of Rutaceae, native to southern China and adjacent mainland Southeast Asia, and one of the principal ancestral taxa of cultivated mandarins, tangerines and many hybrid citrus.
It can be Identify provisionally, compare with authenticated citrus material, or request specialist determination when evidence conflicts.; Inspect and sample labelled scion organs while keeping rootstock observations separate.; Monitor flowering, fruit set, maturity and successive harvests to guide crop-load and harvest decisions.; Select a care response using observed plant condition, rootstock information and linked site measurements.; Assess a proposed seed or vegetative propagation action against the intended identity outcome and donor evidence.; Defer movement, propagation or harvest when a relevant diagnostic result or action prerequisite remains unresolved..
Distinguishing features
Test the scientific assignment against an identified taxonomic treatment and accession evidence; a market label such as mandarin or tangerine is insufficient. UCR notes that tangerine is used beyond Dancy. [UCR Dancy mandarin](https://citrusvariety.ucr.edu/crc3026)
Compare mature fruit shape, rind adherence and segment separation with authenticated reference material when distinguishing a candidate from sweet orange or other citrus; Dancy provides one documented combination of these traits, not a universal species threshold. [UCR Dancy mandarin](https://citrusvariety.ucr.edu/crc3026)
Check documented parentage when distinguishing a species assignment from a horticultural mandarin designation: UCR lists Wilking under Citrus reticulata while recording King tangor × Willowleaf mandarin parentage. [UCR Wilking mandarin](https://citrusvariety.ucr.edu/crc3020)
Trace every diagnostic leaf, flower and fruit to its bearing shoot and position relative to any graft union; evaluate rootstock shoots separately before using their characters to identify the scion.
Scope
+ Assignment to Citrus reticulata under an explicitly named taxonomic treatment, with competing identifications preserved.
+ Individual plant identity, cultivar or accession provenance, and distinction between scion and rootstock growth.
+ Leaf, flower and fruit observations used together to assess identification.
+ Vegetative condition, flowering, fruit development and bearing history.
+ Evidence and prerequisites for care, propagation, sampling and harvest decisions.
- Independent models of other Citrus taxa or hybrids excluded by the selected taxonomic treatment.
- Rootstock biology beyond its relationship to the recorded plant.
- Orchard infrastructure, irrigation systems and soil bodies as independently managed things.
- Pest and pathogen biology, diagnostic protocols and treatment-product specifications.
- Detached fruit lots, processed juice, essential oils and commercial food products.
- Cultivar ownership, nursery businesses and trade transactions.
Characteristics
- Taxonomic assignment and evidence
- Named taxonomic treatment, assigned name, reference accession or determination, evidence date and confidence Makes the meaning of Citrus reticulata explicit and prevents a horticultural label from silently determining registry membership.
- Cultivar or accession identity
- Documented cultivar or accession; provisional identification; unknown Connects observations to an appropriate comparison plant and preserves uncertainty in expected behaviour.
- Propagation and graft composition
- Seedling, rooted cutting, grafted or unknown; parent or donor identity; scion and rootstock identities where known Separates ancestry from physical graft association and identifies which component an observation concerns.
- Leaf and petiole character profile
- Blade length and width in mm; petiole-wing width in mm; shoot position and leaf maturity recorded Provides comparable vegetative evidence when fruit is absent or identity is disputed.
- Fruit character profile
- Mass in g; equatorial and polar diameters and rind thickness in mm; seed count per fruit; sample size and maturity recorded Supports reference comparison without treating one fruit or cultivar as representative of the entire entry.
- Rind adherence and segment separation
- Recorded under a stated assessment protocol; easy, intermediate, difficult or unassessed for each trait Adds useful fruit identification and handling evidence while retaining the assessment method.
- Phenological state
- Vegetative flush, flower buds, open flowers, fruit set, developing fruit, mature fruit; simultaneous states allowed Places observations and candidate interventions in the plant's actual developmental context.
- Fruit maturity indicators
- Soluble solids in °Brix; titratable acidity in g citric acid equivalent per 100 mL juice; rind colour by stated method Supports a harvest decision against an explicit cultivar and use criterion rather than appearance alone.
- Canopy and graft-union condition
- Observed leaf loss, discolouration, dieback, lesions, union damage and affected extent; cause confirmed, suspected or unknown Directs inspection and sampling without converting nonspecific symptoms into a diagnosis.
- Bearing history
- Fruit count or kg per plant per harvest season, with thinning and unharvested losses recorded separately Allows crop-load decisions to use the individual plant's history.
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: 5 bundles · 9 layers · 16 findings · 31 questions.
Mandarin identity and boundaries Establish what assignment to Citrus reticulata means for this plant and how that assignment was reached.
Recognition requires a declared taxonomic boundary, especially where cultivar names and horticultural groupings are involved.
Taxonomic membership
Connect the registry identity to a named treatment and a revisable determination.
Declared reticulata circumscription
Require an explicit inclusion rule rather than assuming every plant sold as a mandarin belongs here.
- Which taxonomic treatment defines Citrus reticulata for this assignment? definition
- Under that treatment, do the candidate's cultivar and documented parentage fall within this registry entry? boundary
- Who made the determination, using which specimens, records or analyses? provenance
Comparative organ evidence
Use observations from traceable organs to test candidate and alternative identifications.
Candidate reference comparison
Compare leaves and mature fruit with authenticated material while recording maturity, sample size and contradictory traits.
- What leaf, petiole, fruit-shape, rind-adherence and seed observations are available from this plant? measurement
- Which observations discriminate the candidate from the specific sweet orange, mandarin cultivar or hybrid proposed as an alternative? boundary
- What additional material or determination is needed before changing the identification? action
Cultivar lineage and graft composition Record how this plant originated and which living components observations describe.
A cultivar claim, seed parent and rootstock association are different relationships with different implications for recognition and propagation.
Accession and propagation origin
Trace the plant to seed, donor material or an accession record.
Traceable cultivar claim
Keep documented identity separate from resemblance or an unsupported nursery label.
- Which nursery, accession, seed lot or donor plant supplied this individual? provenance
- Was it raised from seed or vegetatively propagated, and what evidence supports the stated cultivar identity? provenance
Scion and rootstock attribution
Locate graft boundaries and attribute shoots, symptoms and samples to the correct component.
Organ to graft component
Require component attribution before using an organ as identification evidence or selecting propagation material.
- Is a graft union present, and which scion and rootstock identities are documented? provenance
- Did the observed shoot or sampled organ originate above or below the union? boundary
- Which confirmed scion material, if any, meets the prerequisites for the proposed propagation action? action
Flowering, fruiting and harvest Track reproductive development and evaluate fruit readiness for a declared use.
A usable mandarin model must connect flowering and crop history to observed fruit condition rather than assign a universal harvest calendar.
Flowering and crop load
Record flowering, fruit retention and season-to-season bearing at plant level.
Reproductive course
Preserve dated reproductive observations and relevant pollination context without assuming cultivar-independent behaviour.
- When were flowering, initial fruit set and subsequent fruit drop observed, and how were they sampled? measurement
- What flowering-overlap and pollen-source evidence is available if fruit set or seediness needs investigation? provenance
- Does the recorded crop history justify a crop-load intervention under locally supported guidance? action
Fruit maturity and retention
Assess internal maturity and external condition before harvesting or retaining fruit.
Use-specific harvest readiness
Make harvest readiness an evidenced decision tied to cultivar, intended use and sampling method.
- What do representative samples show for soluble solids, titratable acidity, rind condition and internal defects? measurement
- Which documented maturity and quality criteria apply to this cultivar and intended use? definition
- Should fruit be harvested, retained and reassessed, or excluded from the intended use on the available evidence? action
Mandarin condition and intervention Assess canopy, fruit and graft condition and connect observations to justified next actions.
Care and propagation decisions require symptom attribution, site context and explicit prerequisites rather than a species label alone.
Symptoms and growing context
Localise symptoms and link them to dated environmental and management observations.
Condition without premature diagnosis
Record what is affected and how it changes while preserving competing explanations.
- Which leaves, shoots, fruit or graft-union areas show abnormalities, over what proportion of the plant? measurement
- What dated irrigation, temperature, root-zone or management records coincide with symptom onset? provenance
- Which observations require diagnostic sampling before selecting a treatment? action
Care and material release
Define the evidence needed to intervene or use the plant as a source of propagation material.
Evidence-conditioned action
Associate each proposed action with the relevant plant component, supporting evidence and an observable follow-up criterion.
- What cultivar, rootstock, condition and site evidence supports the proposed irrigation, nutrition or pruning change? action
- Which current donor-health and destination requirements must be satisfied before collecting or moving propagation material? action
- What follow-up observation and reassessment date will establish whether the intervention helped? measurement
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.
- Ponkan (common Chinese mandarin)
- Willowleaf / Mediterranean mandarin (often treated as Citrus deliciosa)
- Satsuma / unshu mikan (often ranked as Citrus unshiu)
- Clementine (commercially a mandarin; botanically a mandarin × sweet-orange hybrid)
- Dancy-type tangerine
- Nanfengmiju (Nanfeng honey mandarin)
- Kinnow (King × Willowleaf tangor, sold as mandarin in South Asia)
- Murcott / Honey Murcott / Nadorcott-Afourer (late tangors sold as mandarins)
- Which of these kinds and varieties hold for the sense of Citrus reticulata 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.
- scientific name (ICN) - Citrus reticulata Blanco - Family Rutaceae; authority Francisco Manuel Blanco, Flora de Filipinas (1837).
- Wikidata - Q185005 - Item for mandarin orange / Citrus reticulata.
- NCBI Taxonomy - 85571 - Taxid for Citrus reticulata.
- Harmonized System (HS) - 0805.21 - Fresh or dried mandarins, including tangerines and satsumas; clementines are 0805.22.
- Chinese Pharmacopoeia crude-drug name - Citri Reticulatae Pericarpium (Chenpi, 陈皮) - Dried mature peel of C. reticulata used as a traditional drug, not a fruit-grade code.
- Which of these identifiers and schemes hold for the sense of Citrus reticulata 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.
- UNECE Standard FFV-14 (Citrus fruit) - United Nations Economic Commission for Europe
- OECD International Standard for Fruit and Vegetables: Citrus Fruit - OECD Fruit and Vegetables Scheme
- EU marketing standard for citrus fruit (Commission Implementing Regulation (EU) No 543/2011, as retained and amended) - European Commission
- United States Standards for Grades of Florida Tangerines - USDA Agricultural Marketing Service
- Citrus canker and huanglongbing (citrus greening) quarantine rules - USDA APHIS and equivalent NPPO measures under the IPPC
- Codex pesticide maximum residue limits on mandarin - FAO/WHO Codex Alimentarius Commission
- Citri Reticulatae Pericarpium monograph - Pharmacopoeia of the People's Republic of China
- Which of these standards and regulation hold for the sense of Citrus reticulata 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.
- Fresh dessert fruit sold as mandarins, tangerines or easy-peelers
- Canned segments, especially satsuma, in syrup or juice
- Peel essential oil (mandarin oil) for flavour and fragrance
- Aged dried peel (chenpi) as a Chinese materia medica and culinary spice
- Breeding parent and, less often, rootstock in citrus orchards
- Gift fruit in East Asian New Year trade
- Dooryard and ornamental trees in subtropical gardens
- Which of these real-world use hold for the sense of Citrus reticulata 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.
- fresh fruit mass - 50-150 - g
- equatorial diameter - 45-80 - mm
- juice soluble solids - 9-14 - °Brix
- titratable acidity of juice - 0.5-1.5 - g/100 mL as citric acid
- juice content - 33-50 - % m/m
- somatic chromosome number - 18 - 2n count
- commercial storage temperature - 4-8 - °C
- Which of these typical measurements hold for the sense of Citrus reticulata 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.
- Huanglongbing (citrus greening, Candidatus Liberibacter spp.) collapsing trees and making fruit bitter and misshapen
- Citrus canker (Xanthomonas citri) causing fruit blemish and trade embargoes
- Citrus tristeza virus, especially on sour-orange rootstock
- Tephritid fruit-fly infestation blocking export
- Postharvest peel puffing, granulation and chilling injury
- Alternate bearing and excessive seediness lowering market grade
- Allergic contact dermatitis from oxidised peel oil (limonene hydroperoxides)
- Pesticide residues on peel of easy-peel fruit eaten with handling
- Which of these failure modes and hazards hold for the sense of Citrus reticulata 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.
- In British retail the commercial class is often 'easy peeler', covering clementines, satsumas and late hybrids rather than botanical C. reticulata.
- In the United States 'tangerine' historically meant Florida Dancy-type fruit, while California trade uses 'mandarin' for clementines, satsumas and W. Murcott.
- In Japan mikan usually means satsuma (C. unshiu), not the broader mandarin group.
- In China 橘子, 柑 and 蜜柑 are used for overlapping local mandarin types; Nanfengmiju is a named regional product.
- In India and Pakistan Kinnow is the dominant 'mandarin' of Punjab, though it is a tangor.
- Mediterranean export (Spain, Morocco, Italy) is dominated by clementines sold as mandarinas.
- Which of these regional variation hold for the sense of Citrus reticulata 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.
- Citrus × sinensis (sweet orange) - Sweet orange has a tightly adherent rind and albedo that does not zip off; fruit is typically larger and the genome is a pummelo-mandarin admixture rather than mandarin-predominant.
- Citrus unshiu (satsuma) - Satsuma is nearly seedless, more cold-hardy, and is treated by many taxonomists as a separate species; it carries a distinct mandarin genome with pummelo introgression.
- Citrus × clementina (clementine) - Clementine is a mandarin × sweet-orange hybrid; seedless in solid plantings, usually earlier and smoother-skinned than common mandarins, and separable by documented parentage or SNP ancestry.
- Citrus maxima (pummelo) - Pummelo fruit is much larger with a thick spongy rind and is one of the other ancestral citrus species, not a mandarin.
- Citrus japonica / Fortunella (kumquat) - Kumquat fruit is far smaller, with a sweet edible rind and acid pulp, and is not loose-skinned in the mandarin sense.
- Citrus × tangelo - Tangelos (mandarin × grapefruit or pummelo) are larger, often necked, and have a different flavour and peel oil profile.
- Citrus × aurantium (sour orange) - Sour orange is seedy, acid, tight-skinned and used mainly as rootstock or for peel oil, not as an easy-peel dessert fruit.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of Citrus reticulata this model covers, and on what evidence? provenance
Sources
- Genomics of the origin and evolution of Citrus - Ancestral status of C. reticulata, hybrid origin of many commercial mandarins, and distinction from pummelo and citron lineages.
- The botany of Citrus and its wild relatives, in The Citrus Industry, Vol. 1 - Classical Swingle circumscription of C. reticulata and its separation from sweet orange, pummelo and other cultivated citrus.
- Flora de Filipinas - Original publication and authorship of the name Citrus reticulata Blanco.
- UNECE Standard FFV-14 concerning the marketing and commercial quality control of citrus fruit - Commercial classes covering mandarins, tangerines, clementines and satsumas, including juice-content minima and sizing practice.
- Citrus reticulata Blanco - Accepted scientific name, authority, family placement and native-range treatment used in botanical checklists.
What the second pass must settle
- Does the registry intend this entry to own living plants only, or also detached botanical specimens and fruit before their transfer to product or lot models?
- Which taxonomic treatment should govern membership, particularly for clementines, satsumas and cultivars with documented hybrid parentage?
- Which authenticated reference accessions and validated diagnostic methods can resolve the most likely identification confusions in the intended deployment region?
- What cultivar-, rootstock- and location-specific evidence supports maturity criteria, bearing expectations and care thresholds?
- Which locally applicable diagnostic, donor-health and plant-movement requirements must be linked before propagation actions can be authorised?