Thymus serpyllum
Enable an AI agent to recognise Thymus serpyllum, assess the condition of a plant or patch, and decide whether observation, cultivation, propagation or collection is justified.
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 Thymus serpyllum, assess the condition of a plant or patch, and decide whether observation, cultivation, propagation or collection is justified.
Thymus serpyllum L. is a prostrate, mat-forming perennial subshrub of Lamiaceae native to temperate Eurasia, distinguished by creeping woody stems that root at the nodes, small elliptic leaves with revolute margins, and compact terminal inflorescences of pink to purple flowers.
It can be Document and key a plant using stem, leaf, shoot and reproductive evidence, escalating unresolved determinations.; Map and revisit a patch to compare live cover, flowering, recruitment and damage.; Evaluate cultivation adjustments against measured root-zone conditions and observed response.; Select and track propagation material from an identified, viable source plant under an evidence-supported protocol.; Schedule or defer cutting, collection and disturbance according to plant condition, reproductive activity and site constraints.; Link collected material to its source plant while handing product safety and processing decisions to neighbouring models..
Distinguishing features
Inspect flowering-stem internodes under magnification: hair distributed around the stem supports T. serpyllum, while hair concentrated on the angles points toward T. pulegioides; combine this with other characters. [BOTANY.cz species account](https://botany.cz/cs/thymus-serpyllum/), [Native Plant Trust account](https://gobotany.nativeplanttrust.org/species/thymus/pulegioides/?key=dichotomous).
Trace creeping shoots to their tips and record whether the main axis continues vegetatively while lateral branches flower; compare this architecture with the regional key for other creeping thymes. [BOTANY.cz species account](https://botany.cz/cs/thymus-serpyllum/).
Examine mature leaf margins: relatively flat blades with basal marginal hairs support the creeping-thyme identification pathway; strongly rolled-under, non-ciliate leaves indicate the T. vulgaris alternative. [BOTANY.cz species account](https://botany.cz/cs/thymus-serpyllum/), [Native Plant Trust key](https://gobotany.nativeplanttrust.org/dkey/thymus/).
To investigate confusion with T. praecox and related creeping thymes, photograph the leaf underside and test whether lateral veins fade before the margin rather than forming an apical marginal vein; complete the applicable regional key before assigning the species. [Burgenland Flora account](https://www.burgenlandflora.at/flora/detail/thymus-serpyllum/).
Check the scientific determination behind labels such as wild thyme or creeping thyme: common names and historical T. serpyllum records can refer to other taxa, so require locality and diagnostic evidence. [Native Plant Trust key](https://gobotany.nativeplanttrust.org/dkey/thymus/).
Scope
+ Species determination, including uncertain identifications and historical uses of the name
+ Observable shoot, leaf and flower characters used to distinguish similar thymes
+ Rooted plants, connected shoots and mapped patches without assuming each patch is one genetic individual
+ Seasonal growth, flowering, recruitment and condition
+ Local substrate, exposure, competition and disturbance relationships
+ Evidence needed to justify cultivation, propagation, sampling or collection
- Independent models of Thymus vulgaris, Thymus pulegioides, Thymus praecox and other neighbouring taxa
- Whole-habitat management and regional population conservation plans
- Manufacture, composition and quality control of dried herbs or essential oils
- Clinical efficacy, medicinal dosing and patient treatment
- Pollinator species biology and complete ecological interaction networks
- Nursery business operations and commercial product certification
Characteristics
- Taxonomic determination
- Scientific name linked to taxonomic authority, regional key, determiner and dated evidence Defines which species concept the identification actually supports.
- Identification confidence
- Label only; tentative; keyed; specialist verified; conflicting Controls whether species-dependent decisions can proceed.
- Flowering-stem hair distribution
- Around circumference; mainly on angles; on opposing faces; mixed; unobservable Provides evidence for separating similar thymes.
- Creeping-shoot architecture
- Vegetative terminal continuation; terminal flowering; mixed; unknown, with rooting nodes recorded Supports determination and identifies connections relevant to division or removal.
- Mature leaf dimensions
- Length and width in mm, with shoot position and sample count Enables comparison with the selected flora without treating one atypical leaf as decisive.
- Leaf diagnostic pattern
- Margin curvature, basal ciliation and lateral-vein termination, each observed or unknown Complements stem characters when resolving creeping-thyme alternatives.
- Patch extent and live cover
- Mapped area in m² and live cover in percent of a fixed observation area Separates lateral spread from increasing density and exposes progressive loss.
- Phenological condition
- Vegetative; budding; flowering; fruit developing; fruit mature; seasonal inactivity; mixed Determines when identification, seed observation and interventions are informative.
- Rooted-shoot viability
- Actively growing; viable without visible extension; declining; dead; uncertain Distinguishes viable propagation material from damaged or dead sections.
- Root-zone conditions
- Soil pH, sand fraction in percent and moisture with stated method and sampling depth Makes site suitability and suspected moisture stress testable.
- Flower visitor activity
- Visits per timed observation, with observed flower quantity and weather Documents current floral use without equating visitation with successful pollination.
- Material provenance
- Link to source population, accession, parent plant or supplier lot; unknown permitted Preserves origin and identity evidence when plants are moved or propagated.
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 · 33 questions.
Thyme identity Establish what the name Thymus serpyllum means for the observed material and how securely it applies.
A creeping-thyme label can conceal a different taxon, making later care, ecological and use claims unreliable.
Name interpretation
Connect the registry name to an explicit taxonomic treatment.
Determination context
Record the adopted species concept and preserve the original label separately from the accepted determination.
- Which authority and regional flora define T. serpyllum for this determination, and do they treat the name narrowly or as an aggregate? definition
- Who supplied or determined the material, under what original name, and with which voucher or photographs? provenance
Diagnostic comparison
Compare observable characters with the locally plausible alternatives.
Character concordance
Retain agreement and disagreement among stem hair, shoot architecture, leaf and floral observations.
- What hair distribution, terminal shoot behaviour, leaf dimensions, marginal hairs and vein pattern are visible on representative shoots? measurement
- Which key steps exclude T. pulegioides, T. praecox, T. vulgaris or another locally plausible thyme, and which remain unresolved? boundary
- Is flowering material or specialist examination required before accepting the determination? action
Creeping plant boundaries Represent the rooted shoots and spatial continuity of the observed thyme.
A mat may contain connected shoots, separate individuals or intermixed taxa; its visible outline alone cannot settle ownership of observations.
Rooted shoot connections
Identify the physical unit being assessed or manipulated.
Observation unit
Distinguish a shoot, rooted unit and mapped patch without assuming genetic individuality.
- Does this record describe one shoot, a traced rooted unit or a mapped patch containing potentially several plants? definition
- Which creeping stems and rooting nodes visibly connect the recorded sections, and where is continuity unknown? boundary
Patch change
Measure spread, fragmentation and admixture over repeat observations.
Live mat extent
Keep patch footprint distinct from live thyme cover and neighbouring vegetation.
- What are the mapped footprint, live thyme cover and bare or dead fractions within the same observation boundary? measurement
- Do apparent gains or losses reflect rooted shoot extension, seedlings, fragmentation or changes in intermixed vegetation? boundary
Flowering and renewal Track seasonal shoot activity, floral availability and evidence of replacement plants.
Flowering, vegetative extension and successful recruitment provide different evidence about persistence and intervention timing.
Seasonal shoot activity
Record local phenology without imposing a universal flowering calendar.
Vegetative and floral stage
Describe the simultaneous states of creeping axes and flowering branches.
- Which shoots are extending, budding, flowering, fruiting or inactive at the observation date? measurement
- When should the patch be revisited to obtain missing diagnostic flowers or observe fruit maturation? action
Reproductive outcome
Separate floral visitation, fruit formation and established recruitment.
Visitation and recruitment
Require direct evidence before inferring successful reproduction from flowers or insects.
- What flower visits, mature fruits and newly established seedlings were observed, with what sampling effort? measurement
- How were seedlings distinguished from small shoots still connected to an established thyme plant? boundary
- Does current flowering or fruit development justify postponing cutting or collection? action
Site fit and decline Relate the condition of the thyme mat to its immediate growing environment and disturbance history.
Sparse growth or browning needs interpretation against substrate, exposure, competition and recent events before care is changed.
Root zone and exposure
Record conditions that can be compared with evidence for the identified taxon and provenance.
Measured site fit
Assess the actual microsite rather than transferring requirements from another plant sold as creeping thyme.
- What substrate texture, pH, moisture persistence, sun exposure and competing canopy occur at the rooted shoots? measurement
- Which cultivation or habitat evidence applies to this taxonomic determination, provenance and climate? provenance
Decline evidence
Distinguish visible symptoms from their proposed causes.
Mat damage pattern
Locate dieback and injury relative to living tips, rooting nodes and disturbance.
- Where are dead sections, discoloured leaves, damaged stems or failed rooting nodes, and how has their extent changed? measurement
- What evidence distinguishes seasonal inactivity from moisture stress, trampling, shading or a diagnosed biological cause? boundary
- Which limited intervention and follow-up observation would test the leading explanation without unnecessarily removing viable mat? action
Propagation and collection Connect proposed movement or removal of thyme material to identity, viability, origin and site consequences.
A rooted fragment, seed lot and harvested shoot carry different identity evidence and different consequences for the source patch.
Propagation lineage
Preserve parentage and verify establishment when producing or relocating plants.
Traceable propagule
Record the source, material type and evidence supporting the selected propagation method.
- Which identified parent or accession supplied the seed, cutting or rooted division, and could the source contain other thymes? provenance
- Which protocol supports the proposed method and timing for this material, and what observation will demonstrate establishment? action
- Which identity or cultivar attributes require reassessment in the resulting plants? boundary
Collection decision
Determine whether removal is justified and where this living-plant model must hand responsibility onward.
Bounded removal
Tie collection to a stated purpose, site authority, source-patch condition and retained provenance.
- What purpose, site permission and applicable local restrictions govern the proposed collection or relocation? action
- What quantity and plant parts can be removed while meeting an explicit retention and recovery objective for this patch? action
- When material leaves the plant, which product or laboratory model takes responsibility for contamination, chemical composition and suitability for its intended use? 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.
- wild/creeping thyme (typical T. serpyllum)
- Breckland thyme (British native populations on sandy heaths)
- cultivar groups sold as creeping thyme for rock gardens and lawns (e.g. 'Elfin', 'Coccineus', 'Album')
- chemotypes distinguished by essential-oil profile (carvacrol-, thymol-, linalool-dominant)
- T. serpyllum s.str. versus the broader serpyllum aggregate used in older floras
- Which of these kinds and varieties hold for the sense of Thymus serpyllum 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.
- IPNI / POWO LSID - urn:lsid:ipni.org:names:455611-1 - Linnaean name Thymus serpyllum L.
- Wikidata - Q147481 - Item for the species; verify if using a strict vs aggregate concept.
- GBIF taxon key - 2926448 - Occurrence backbone key commonly used in biodiversity datasets.
- ITIS TSN - 32367 - North American taxonomic serial number; status should be checked against current ITIS.
- Which of these identifiers and schemes hold for the sense of Thymus serpyllum 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.
- European Pharmacopoeia: Serpylli herba (wild thyme) - EDQM
- ISO 6754 / related ISO essential-oil specifications for thyme oils (where applied to T. serpyllum rather than T. vulgaris) - ISO
- CITES: not listed
- EU novel-food / traditional herbal medicinal product rules for thyme herb and oil - EMA / national competent authorities
- National red-list and habitat-protection rules for Breckland thyme populations (UK Wildlife and Countryside Act / SSSI regime where applicable)
- Which of these standards and regulation hold for the sense of Thymus serpyllum 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.
- Ground-cover ornamental in rock gardens, between paving, and as a thyme 'lawn'
- Culinary herb and honey plant (wild-thyme honey in mountain and heath landscapes)
- Traditional herbal medicine: aerial parts as Serpylli herba for coughs and digestive complaints
- Source of essential oil (chemotype-dependent thymol/carvacrol/linalool)
- Indicator/component of dry grassland, sandy heath and alpine-pasture plant communities
- Erosion-binding mat on thin, well-drained soils
- Which of these real-world use hold for the sense of Thymus serpyllum 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.
- plant height - 20-100 - mm
- leaf length - 3-8 - mm
- flowering period (temperate Europe) - June-August - month
- essential-oil yield (dry herb, typical) - 0.2-0.6 - % v/w
- ploidy (common cytotypes) - 2n = 24, 26, 50-56 - chromosome number
- Which of these typical measurements hold for the sense of Thymus serpyllum 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.
- Winter wet and poorly drained soils cause root rot and stand collapse in cultivation
- Misidentified nursery stock: many plants sold as T. serpyllum are T. praecox, T. pulegioides or hybrids
- Essential-oil irritation and sensitisation (thymol/carvacrol-rich chemotypes); not for undiluted dermal use
- Over-collection of wild stands in some mountain districts
- Frost heave and drought kill-out on shallow soils
- Confusion with toxic look-alikes is low, but substitution in herbal trade can alter oil chemistry and dose
- Which of these failure modes and hazards hold for the sense of Thymus serpyllum 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 usage 'wild thyme' and especially 'Breckland thyme' often mean T. serpyllum s.str. on sandy heaths; garden 'creeping thyme' is frequently T. praecox
- Central and southern European floras treat a large serpyllum aggregate; many former subspecies are now other species (T. praecox, T. pulegioides, T. longicaulis)
- Nordic and alpine populations are often more compact and may be keyed separately in local floras
- North American 'wild thyme' in horticulture is almost always introduced T. praecox / T. serpyllum s.l., not a native species
- Which of these regional variation hold for the sense of Thymus serpyllum 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.
- Thymus praecox (creeping thyme) - T. praecox is typically less woody, often has longer creeping non-flowering shoots and different calyx/leaf-hair characters; most garden 'serpyllum' is this species.
- Thymus pulegioides (large thyme / lemon thyme group in part) - Larger, more erect plants with broader leaves and a stronger lemon or carvacrol odour; inflorescences more elongated.
- Thymus vulgaris (garden/common thyme) - Erect subshrub 150-300 mm, grey-tomentose leaves, not a rooting mat; culinary 'thyme' in shops is almost always this species.
- Thymus longicaulis / T. drucei (depending on flora) - Separated by stem-hair orientation, leaf shape, and whether flowering stems arise from the mat or from elongated axes; check the regional monograph.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of Thymus serpyllum this model covers, and on what evidence? provenance
Sources
- Thymus serpyllum - Accepted name, common names, morphology, native range, and horticultural use.
- Thymus serpyllum L. - Kew Plants of the World Online accepted status, IPNI LSID, distribution, and nomenclatural authority.
- European Pharmacopoeia monograph on Serpylli herba (wild thyme) - Pharmacopoeial identity of wild thyme herb and essential-oil quality requirements.
- Flora Europaea treatment of Thymus - Taxonomic circumscription of T. serpyllum versus closely related thyme species in Europe.
What the second pass must settle
- Which taxonomic authority and regional treatment should resolve the registry's presently undefined species scope, including historical broad uses of T. serpyllum?
- Which combination of diagnostic characters reliably separates this taxon from local T. praecox, other creeping thymes and possible hybrids, including non-flowering material?
- Which substrate, moisture and exposure limits are supported for the relevant provenance rather than inferred from generic creeping-thyme advice?
- Which propagation protocols and establishment criteria have been verified for the intended seed source, clone or cultivar?
- What local evidence establishes collection constraints, acceptable removal and recovery expectations for a particular wild or cultivated patch?