Melissa officinalis
Enable an agent to recognise Melissa officinalis, assess its living individuals and populations, and choose evidence-based cultivation, monitoring or collection 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.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise Melissa officinalis, assess its living individuals and populations, and choose evidence-based cultivation, monitoring or collection actions.
Melissa officinalis L. (lemon balm) is a species of aromatic perennial herb in the mint family, Lamiaceae, distinguished by opposite, toothed leaves with a lemon-like scent and small flowers borne in axillary clusters.
It can be Identify a candidate plant using documented morphology and escalate ambiguous material for expert determination.; Monitor seasonal growth, flowering, recruitment and plant condition.; Select and evaluate site care or propagation methods using evidence applicable to the accession and locality.; Assess escape and establishment before planting, moving or containing material.; Collect permitted vouchers or plant material while preserving identity, locality and donor provenance.; Link harvested material to a separate product model without transferring unsupported medicinal claims..
Distinguishing features
Check opposite, ovate, wrinkled leaves with rounded teeth together with square stems; this combination supports recognition but does not uniquely identify the species. [NC State Extension](https://plants.ces.ncsu.edu/plants/melissa-officinalis/)
Record a lemon-like scent from gently bruised foliage as supporting evidence; require morphology as well when distinguishing plants traded as lemon balm, lemon mint or lemon verbena. [NC State Extension](https://plants.ces.ncsu.edu/plants/melissa-officinalis/)
Inspect small, two-lipped flowers grouped in upper leaf axils, documented as white in the horticultural reference; compare their arrangement with a regional key for suspected mint or catnip lookalikes. [NC State Extension](https://plants.ces.ncsu.edu/plants/melissa-officinalis/)
Resolve a label to the accepted Melissa officinalis L., published in 1753, within Lamiaceae; retain subspecies attribution because Kew recognises subsp. officinalis and subsp. inodora within this species. [Kew POWO](https://powo.science.kew.org/taxon/450084-1)
Scope
+ Taxonomic identity, authority, synonyms, subspecies and cultivar attribution.
+ Identification from vegetative and flowering material, with evidence and uncertainty.
+ Life stages, seasonal growth, reproduction and propagation.
+ Native and introduced occurrence, habitat and local population behaviour.
+ Plant condition, cultivation decisions and collection provenance.
+ Conservation assessments and location-specific management constraints.
- Other Melissa species and unrelated plants sold under ambiguous balm or lemon common names.
- Essential oils, dried herbal materials, extracts and formulated products as independent things.
- Clinical efficacy, prescribing, therapeutic dosage and patient treatment.
- Chemical substances considered independently of the sampled plant.
- Whole garden, farm or ecosystem management beyond this species' participation.
Characteristics
- Taxonomic determination
- Accepted taxon concept, authority, reference version, GBIF identifier and NCBI Taxonomy identifier when verified Connects the registry entry to biological evidence without assuming different taxonomic databases use identical boundaries.
- Observation subject
- Species; population; genetic individual; rooted shoot; propagule Prevents population counts, individual health and species conservation status from being conflated.
- Infraspecific identity
- Verified subspecies; documented cultivar; unresolved Allows identification and cultivation evidence to apply to the appropriate material.
- Identification confidence
- Unresolved; provisional; confirmed, with examiner and supporting evidence Controls whether observation, propagation or collection can proceed on a dependable identification.
- Phenological condition
- Seed; seedling; vegetative; budding; flowering; fruiting; senescent; dormant; dead Supports seasonal comparisons and distinguishes temporary loss of shoots from plant death.
- Plant size
- Height and canopy width in cm, with date and growth stage Tracks growth or recovery without treating size alone as a diagnostic character.
- Leaf aroma observation
- Lemon-like; other; undetected; untested, with leaf age and observation method Separates a sensory observation from species confirmation or measured chemical composition.
- Site conditions
- Soil pH; volumetric water content in %; direct light in hours/day; temperature in degrees C Links growth and stress observations to the conditions experienced by the plant.
- Local establishment
- Planted; casual escape; established population; unresolved, with locality and date Distinguishes cultivation from independently persisting occurrence.
- Recruitment and spread
- New seedlings per square metre per survey interval; occupied area in square metres Provides evidence for containment decisions and population change.
- Conservation assessment
- Assessment body, category, geographic scope, assessment year and taxon concept; unknown until verified Keeps formal threat assessments separate from garden abundance or local nuisance status.
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 · 19 findings · 32 questions.
Taxon and record boundaries Anchor lemon balm records to the registered species and distinguish the biological subjects being observed.
Common names, subspecies, cultivated accessions and individual plants must not become competing definitions of the registry entry.
Accepted name and crosswalks
Establish the nomenclatural reference and external identifier mappings.
Name authority and taxonomic concept
Record the accepted name, publication authority and the treatment governing included subspecies.
- Which taxonomic treatment defines Melissa officinalis for this model, including authority, publication date and included subspecies? definition
- Which verified GBIF and NCBI Taxonomy records match that treatment, and where do their boundaries differ? provenance
Species, population and accession
Separate species statements from observations of planted or wild material.
Biological subject and lineage
Identify whether a record concerns a population, plant, rooted shoot or propagule and retain accession ancestry.
- Does this observation concern the species, a local population, a genetic individual or a rooted shoot? boundary
- What voucher, supplier record or donor accession supports the assigned subspecies or cultivar? provenance
Lemon balm identification Combine leaf, stem, scent and flower evidence while tracking unresolved lookalikes.
A lemon scent or a nursery label alone cannot establish the identity of a living plant.
Vegetative evidence
Assess recognition when flowers are unavailable.
Leaf, stem and aroma combination
Document vegetative characters together and distinguish missing evidence from contradictory evidence.
- What leaf arrangement, blade shape, margin, surface texture and stem cross-section are visible on this specimen? measurement
- How was foliage aroma assessed, and which locally plausible lemon-scented or mint-family lookalikes remain unresolved? boundary
Flowering confirmation
Use reproductive structures and a suitable key to strengthen determination.
Floral key and voucher
Record diagnostic floral details and preserve evidence that another observer can examine.
- Which flower-position, corolla and calyx characters distinguish this specimen from competing identifications in the regional flora? definition
- Should identification remain provisional until flowering photographs or a permitted voucher can be examined? action
Seasonal life and reproduction Follow establishment, seasonal persistence and the origin of new plants.
Care and population estimates depend on growth stage and on whether new shoots represent recruitment or vegetative continuity.
Phenology and persistence
Track seasonal transitions under the observed climate and management.
Stage and regrowth
Associate plant condition with dated evidence of emergence, flowering, senescence and recovery.
- When does this accession emerge, flower, fruit and lose its above-ground growth at this site? measurement
- What evidence distinguishes dormancy or recent cutting from irreversible death of the plant? boundary
Reproductive function and propagation
Record sexual function, seed production and vegetative propagation without imposing animal sex categories.
Offspring origin and fertility
Separate flower-level reproductive observations from claims about plant sex, fertility or clonal identity.
- What floral sexual organisation and fertility are documented, and is any sexual dimorphism relevant to this accession? definition
- Are new plants seed-derived or vegetatively propagated, and what evidence supports their parentage and cultivar fidelity? provenance
- Which propagation method has demonstrated acceptable establishment for this material under comparable conditions? action
Range, habitat and establishment Place occurrences in their geographic and ecological context.
Kew describes a native range from the Mediterranean to Central Asia and separately lists introduced regions; local occurrence therefore needs an origin assessment. [Kew POWO](https://powo.science.kew.org/taxon/450084-1)
Occurrence and site fit
Connect locality evidence to range attribution and measured growing conditions.
Origin and microhabitat
Distinguish native occurrence, introduction and planting while recording the actual site.
- Which dated flora or occurrence evidence supports native, introduced or unresolved origin at this locality? provenance
- What light, drainage, soil moisture and temperature conditions accompany persistence or decline here? measurement
Recruitment and ecological effects
Assess persistence beyond planting and observed interactions with surrounding organisms.
Escape, spread and flower visitors
Use local observations to evaluate establishment, neighbouring vegetation and floral visitation.
- Do repeated surveys show surviving recruits outside the planted area, increasing cover or effects on neighbouring vegetation? measurement
- Which flower visitors were observed, and what additional evidence would establish effective pollination? boundary
- Does the documented local spread justify monitoring, seed-set control or containment? action
Condition, care and collection Support care and collection decisions while preserving the boundary between a plant and its products.
An agent needs to evaluate the living plant before intervention and retain provenance when material leaves it.
Plant condition and response
Relate visible damage and growth changes to evidence about causes and interventions.
Symptoms and care decisions
Document affected organs and evaluate responses without treating symptoms as confirmed diagnoses.
- Which leaves, stems or roots are affected, and what observations distinguish water stress, nutrient limitation, pests or disease? measurement
- What evidence supports adjusting irrigation, drainage, pruning or other care, and what outcome will be monitored? action
Collection and conservation
Check collection context and hand harvested material to the appropriate neighbouring model.
Assessment and collection permission
Keep formal conservation status, local population condition and collection constraints distinct.
- What verified IUCN or regional assessment applies, with assessment year, geographic scope and taxonomic coverage? provenance
- Given local population condition, ownership and applicable collection rules, may this plant be sampled or harvested? action
Harvested material handoff
Preserve donor identity and sampling context without making product quality or therapeutic efficacy properties of the species.
- Which donor accession, organ, growth stage, collection date and treatment history belong with the removed material? provenance
- At what point must drying, extraction, chemical assay, contamination testing or therapeutic claims be handled by a separate material or product model? 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.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- This is a recall-based description; no sources were consulted.
- Verify accepted infraspecific taxa, exact GBIF and NCBI identifiers, and detailed native-range boundaries before publication.
- No IUCN category or assessment year is asserted; garden abundance and widespread cultivation do not establish conservation status.
- Which of these check these first hold for the sense of Melissa officinalis this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- International Code of Nomenclature for algae, fungi, and plants (ICN) - Melissa officinalis L. - The botanical authority abbreviation L. refers to Carl Linnaeus; the name was published in 1753.
- GBIF taxon key - Integer identifier - The exact identifier and its association with an accepted taxon or synonym require verification.
- NCBI Taxonomy ID - Integer identifier - The exact identifier is not recalled confidently.
- Which of these identifiers and schemes hold for the sense of Melissa officinalis this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- The International Code of Nomenclature for algae, fungi, and plants, adopted through International Botanical Congresses, governs its scientific naming.
- The European Pharmacopoeia, published by the European Directorate for the Quality of Medicines & HealthCare, includes a Melissa leaf monograph for the herbal material rather than the living species.
- Which of these standards and regulation hold for the sense of Melissa officinalis this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Leaves are used to flavour foods and beverages.
- Dried leaves are used in herbal infusions.
- The plant is cultivated in herb gardens and as a fragrant ornamental.
- Flowers provide forage for bees and other visiting insects.
- Plant material is used to produce aromatic extracts and essential oil.
- Which of these real-world use hold for the sense of Melissa officinalis this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Height of established flowering plants - Approximately 30-100 - cm
- Which of these typical measurements hold for the sense of Melissa officinalis this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Self-seeding can lead to unwanted establishment beyond the intended planting area.
- Persistently waterlogged soil can cause root deterioration and plant loss.
- Lemon scent alone is insufficient for botanical identification because unrelated plants can have similar aromas.
- Which of these failure modes and hazards hold for the sense of Melissa officinalis this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Its native range is broadly associated with the Mediterranean region and western Asia; precise boundaries require checking against a taxonomic source.
- Cultivation and naturalisation have extended its occurrence beyond its native range, so a local record does not establish native status.
- Which of these regional variation hold for the sense of Melissa officinalis this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Melissa - Melissa is the genus; Melissa officinalis is a species within it.
- Aloysia citrodora - Lemon verbena is a woody plant in Verbenaceae with narrow leaves; lemon balm is an herbaceous member of Lamiaceae with broader, toothed leaves.
- Mentha - Mints belong to a different genus within Lamiaceae; shared aromatic foliage does not establish membership in Melissa.
- Melissa leaf - The harvested herbal material consists of plant leaves and has material-quality requirements; it is not the species as a taxonomic entity.
- A population or individual of Melissa officinalis - A population is a geographically situated group and an individual is one organism; the species encompasses these without sharing their particular age, condition or abundance.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of Melissa officinalis this model covers, and on what evidence? provenance
What the second pass must settle
- Which GBIF and NCBI Taxonomy identifiers match the adopted species concept, and how do their subspecies treatments align with Kew?
- What current global IUCN and regional assessments exist, with which assessment years and taxonomic coverage?
- Which regional diagnostic characters reliably distinguish both accepted subspecies and relevant lookalikes, particularly when scent or flowers are unavailable?
- How do accession, climate and propagation method affect flowering, fertility, seasonal persistence and recruitment?
- Which local evidence establishes ecological impacts, cultivation limits and sustainable collection intensity for the population being managed?