Artemisia absinthium
Enable an AI agent to recognise Artemisia absinthium, assess the condition and reproductive state of its plants or attributable material, and determine whether observation, cultivation, collection or containment 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 Artemisia absinthium, assess the condition and reproductive state of its plants or attributable material, and determine whether observation, cultivation, collection or containment is justified.
Artemisia absinthium L. is a perennial Asteraceae herb native to temperate Eurasia and North Africa, diagnosed by densely silvery-sericeous 2-3-pinnatisect leaves, nodding yellowish capitula, and a pharmacognostic profile of intensely bitter guaianolide sesquiterpene lactones (chiefly absinthin) plus a variable thujone-bearing essential oil; it is the source of the herbal drug Absinthii herba and the principal botanical of absinthe.
It can be Document leaves at several stem positions and dissect a flower head to support or challenge identification.; Monitor marked plants for seasonal development, injury and recovery.; Survey surrounding ground for attributable recruits and changes in occupied area.; Collect a voucher or traceable sample when collection authority and plant condition permit.; Propagate or transplant identified plants when local restrictions and containment requirements permit.; Hold collected material pending identity or analytical review, and refer intended food or medicinal use to the corresponding product model..
Distinguishing features
Inspect both leaf surfaces for silvery hairs, then compare basal and upper leaves; basal leaves are more divided and upper leaves progressively smaller and simpler. Require this combination when assessing a possible mugwort or another wormwood. [South Dakota State University](https://openprairie.sdstate.edu/nativeplant/203/)
Examine a flower head under magnification for numerous long hairs on the receptacle between florets; record this separately from hairs on the outer bracts. [South Dakota State University](https://openprairie.sdstate.edu/nativeplant/203/)
Within the relevant Artemisia key, test for basal leaves divided two or three times with obovate lobes; do not accept silver foliage alone as identification. [Flora of North America key](https://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=316928)
Check for a persistent perennial base when distinguishing it from annual wormwood, Artemisia annua; a young shoot alone may leave this unresolved. [South Dakota State University](https://openprairie.sdstate.edu/nativeplant/203/), [Flora of North America key](https://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=316927)
Scope
+ Identification of living plants and collected specimens, including unresolved identification.
+ Leaf, stem and flower-head characters used to distinguish this species.
+ Individual condition, seasonal development and reproductive readiness.
+ Cultivated or spontaneous occurrences and observed recruitment.
+ Identity, condition and analytical evidence for unprocessed collected plant material.
+ Evidence needed to choose observation, propagation, collection or containment.
- Other Artemisia species and the genus as a whole.
- Absinthe beverages, distilled essential oils, extracts and formulated medicines.
- Human diagnoses, treatment selection and dosing.
- Whole habitats, plant communities and ecosystem management plans.
- Chemical substances such as thujone considered independently of a plant sample.
- Jurisdiction-wide legal rules and commercial supply-chain operations.
Characteristics
- Identification determination
- unexamined | provisional | supported | disputed | rejected Controls whether an observation or material lot can be attributed to this species.
- Identification evidence
- Linked specimen, photographs, regional key, determiner and determination date Allows another agent to review the attribution and its regional applicability.
- Leaf division and surface covering
- Division depth, terminal-lobe shape and hair covering on both surfaces, recorded by stem position Prevents unlike leaf positions from being compared as if they were equivalent.
- Receptacle hair evidence
- long hairs observed | apparently glabrous | obscured | not examined Captures a useful identification character without equating missing inspection with absence.
- Plant height
- cm above ground, with date and flowering-stem inclusion stated Supports growth tracking and identification without imposing a universal height cutoff.
- Phenological state
- seedling | vegetative | budding | flowering | fruiting | senescent | dormant | uncertain; concurrent states allowed Determines which identification evidence and management actions are available.
- Crown and shoot condition
- Observed living buds, new growth, dieback, wilting, discoloration and physical damage Supports assessment of persistence and injury while keeping inferred causes separate.
- Occurrence origin
- deliberately planted | documented escape | spontaneous origin unresolved | unknown Distinguishes planting history from evidence of spread.
- Recruitment outside the managed footprint
- Confirmed recruits per surveyed area in m², with date and search effort Makes containment decisions depend on observed establishment.
- Collected material identity
- Plant part and lot linked to source plants or voucher, collection date and handling history Preserves attribution after material is separated from the plant.
- Sample thujone assay
- Separate alpha- and beta-thujone results in mg/kg with fresh/dry basis, method, detection limits and sample identity Supports material-specific review; an untested lot must remain analytically unknown.
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 · 30 questions.
Wormwood identification Evidence that the observed plant or specimen is Artemisia absinthium.
Common names and silver foliage cannot establish the registry identity.
Leaf sequence
Comparable observations from basal, middle and upper positions.
Leaf character agreement
Record whether leaf division, lobe shape and surface hairs jointly support the determination.
- What division, terminal-lobe shape and hair covering were observed at each sampled stem position? measurement
- Which locally plausible Artemisia alternatives remain compatible with those observations? boundary
Flower-head verification
Reproductive characters and the evidence supporting their interpretation.
Receptacle and key evidence
Retain magnified observations and the identification path rather than only a species label.
- Were long hairs seen between florets on the receptacle, and what image or specimen preserves that observation? measurement
- Which regional key and determiner support the identification, and which required characters were unavailable? provenance
Perennial condition and season Persistence, current condition and reproductive development of individual plants.
Seasonal shoot loss, injury and reproductive readiness require different decisions.
Crown and shoot condition
Evidence of survival, growth and damage across successive observations.
Persistence versus dieback
Separate observed crown and shoot condition from explanations such as dormancy, drought or disease.
- What living buds, new shoots or crown damage are visible, and how have they changed since the previous observation? measurement
- What evidence distinguishes seasonal dieback from injury or death at this site? boundary
Flowering and fruiting
Observed reproductive stages rather than calendar-based assumptions.
Reproductive readiness
Record buds, open heads, developing fruits and suspected shedding independently.
- Which reproductive stages are present, in what proportions, and on what date? measurement
- Does the observed stage call for identification sampling, propagation collection or containment before further fruit development? action
Occurrence and establishment Where the plant occurs, how it arrived and whether it is establishing beyond intended cultivation.
A planted individual and a recruiting population create different management obligations.
Site and origin
Location, planting history and environmental observations attached to the occurrence.
Occurrence context
Keep documented origin separate from assumptions based on roadsides, gardens or disturbed ground.
- What planting, collection or earlier survey record explains this occurrence? provenance
- What light exposure, soil moisture, drainage and recent disturbance were observed at the occupied site? measurement
Recruitment and expansion
Evidence of additional plants outside the original occupied or planted area.
Establishment beyond footprint
Distinguish confirmed recruits from unidentified seedlings and additional shoots whose connection is unresolved.
- How many independently established, identified plants occur beyond the recorded footprint, and what area was searched? measurement
- What local status and observed recruitment justify continued monitoring, containment or removal? action
Collected wormwood material Attribution and condition of separated plant parts before their transformation into products.
Identification confidence and plant condition do not automatically transfer to a mixed or poorly documented lot.
Plant part and traceability
Collection identity, composition and connection to an identified source.
Traceable material lot
Record the actual plant parts; the medicinal term Absinthii herba refers to leaves or leafy flowering tops. [European Medicines Agency](https://www.ema.europa.eu/en/medicines/herbal/absinthii-herba)
- Which plant parts and developmental stages comprise this lot, and were several sources combined? definition
- Which identified plants or voucher, collector and collection date support its attribution? provenance
Material condition and assay
Handling, deterioration, foreign material and sample-specific chemical results.
Lot-specific acceptability evidence
Keep identity, physical condition and composition as separate judgments; thujone warrants analytical attention because the EMA monograph identifies neurotoxicity concerns. [EMA monograph](https://www.ema.europa.eu/en/documents/herbal-monograph/final-european-union-herbal-monograph-artemisia-absinthium-l-herba_en.pdf)
- What drying, storage, moisture, visible deterioration and foreign-material evidence is available for this lot? measurement
- Were alpha- and beta-thujone measured in a representative sample, with what method, reporting basis and uncertainty? measurement
- Which missing or adverse results require holding the lot before transfer to a product-specific assessment? action
Intervention and use boundaries Conditions for acting on plants and handing material to neighbouring use models.
Species recognition alone cannot establish permission to propagate, remove, consume or formulate it.
Plant management decision
Evidence and authority for retaining, collecting, propagating or removing plants.
Justified plant intervention
Connect each intervention to a specific plant state, site objective and applicable local constraint.
- What objective and observed condition justify the proposed collection, propagation, transplantation or removal? action
- Which landholder permission and current local rules apply to this action and location? provenance
- What follow-up observation will show whether the intervention achieved its objective or allowed renewed establishment? measurement
Preparation and exposure handoff
The boundary between a plant or raw material and a proposed food, medicine or other preparation.
Use-specific review required
Transfer intended preparation and exposure questions to the relevant product model; EMA medicinal conclusions concern specified preparations and traditional use, not blanket approval of the species. [European Medicines Agency](https://www.ema.europa.eu/en/medicines/herbal/absinthii-herba)
- What transformation, intended route of exposure and product category are proposed for this material? boundary
- Which product-specific authority and evidence must accept the material before the proposed use proceeds? action
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.
- Grand wormwood / common wormwood grown as the culinary-distilling herb
- Pharmacopoeial dried aerial parts (Absinthii herba)
- High-β-thujone essential-oil chemotypes used historically for absinthe
- Low-thujone chemotypes (cis-epoxyocimene, sabinene or chrysanthenyl acetate dominant) preferred where thujone limits bind
- Ornamental silver-leaved garden clones such as 'Lambrook Silver'
- Wormwood essential oil (steam-distilled product, distinct from the herb)
- Naturalized weedy North American populations versus Eurasian cultivated stock
- Which of these kinds and varieties hold for the sense of Artemisia absinthium 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 - Q25686 - Item for the species Artemisia absinthium.
- Linnaean binomial - Artemisia absinthium L. - Sp. Pl. 2: 848 (1753); the nomenclatural authority is Linnaeus.
- USDA PLANTS - ARAB8 - Symbol for Artemisia absinthium L. in the PLANTS database.
- ITIS TSN - 35445 - Taxonomic Serial Number for the species.
- NCBI Taxonomy - 72363 - Taxid for Artemisia absinthium.
- EPPO code - ARTAB - EPPO plant code used in plant-health and weed records.
- European Pharmacopoeia herbal-drug name - Absinthii herba - Official Latin title of the dried aerial parts.
- CAS - 8008-93-3 - Common registry number for wormwood oil; the herb itself is not a single CAS substance. Absinthin is 1362-42-1.
- INCI - Artemisia Absinthium Oil / Extract / Herb - Cosmetic ingredient names for oil, extract and herb.
- Harmonized System - 1211.90 - Plants and parts of plants used primarily in pharmacy or for insecticides/fungicides; wormwood herb is typically classified here rather than as a spice.
- Which of these identifiers and schemes hold for the sense of Artemisia absinthium 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.
- EDQM European Pharmacopoeia monograph Absinthii herba (identity, bitterness value, essential-oil content of the herbal drug).
- EMA HMPC European Union herbal monograph on Artemisia absinthium L., herba (traditional use, posology, safety including pregnancy).
- Regulation (EC) No 1334/2008 (EU flavourings): α- and β-thujone maxima, including 35 mg/kg in alcoholic beverages produced from Artemisia species, 10 mg/kg in other alcoholic drinks, 0.5 mg/kg in non-alcoholic beverages.
- U.S. FDA 21 CFR 172.510: wormwood permitted as a natural flavouring only if the finished food is thujone-free.
- Directive 2004/24/EC (traditional herbal medicinal products) as the EU legal route for Absinthii herba medicines.
- German Commission E monograph for Wermutkraut (historical national herbal standard still cited in practice).
- National absinthe reconstitution laws after the 20th-century bans (notably Swiss and French rules on absinthe composition and labelling).
- Which of these standards and regulation hold for the sense of Artemisia absinthium 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.
- Bittering botanical in absinthe (grande absinthe), vermouth, bitters and amari.
- Dried herb infused as a bitter tea or tincture for temporary loss of appetite and dyspeptic complaints under herbal-medicine monographs.
- Steam-distilled essential oil used sparingly in flavour and fragrance, constrained by thujone caps.
- Ornamental silver foliage plant in temperate gardens.
- Traditional anthelmintic and insect-repellent herb (the English name wormwood); also used in some companion-planting schemes.
- Cultural crop of the Val-de-Travers (Switzerland) and Pontarlier (France) absinthe districts; pelin-style wines and bitters in Central and Eastern Europe.
- Naturalized roadside and rangeland weed in parts of North America.
- Which of these real-world use hold for the sense of Artemisia absinthium 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.
- Mature plant height - 0.4-1.5 - m
- Essential oil in dried aerial parts - 0.2-1.5 - mL/100 g
- Bitterness value of Absinthii herba (Ph. Eur.) - ≥10000 (typical lots often 10000-50000) - Ph. Eur. bitterness units
- α- plus β-thujone in the essential oil (chemotype-dependent) - near 0 to >60 - % of oil (m/m)
- Absinthin in dried herb - about 0.2-0.5 - % (m/m)
- EU legal cap for thujone in Artemisia-derived alcoholic beverages - max 35 - mg/kg
- Somatic chromosome number - 2n = 18 - chromosomes
- Which of these typical measurements hold for the sense of Artemisia absinthium 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.
- Acute thujone neurotoxicity (tremor, seizures) from essential oil or other concentrated preparations; the historic syndrome 'absinthism' is now largely attributed to ethanol, but high-dose thujone remains a real toxicology endpoint.
- Contraindicated in pregnancy and lactation in EU herbal monographs (traditional uterine-stimulant / abortifacient reputation).
- Allergic contact dermatitis from sesquiterpene lactones in the herb.
- Gastrointestinal irritation and, with prolonged high-dose folk use, reports of renal and CNS effects.
- Livestock poisoning or unpalatability if wormwood dominates pasture; also a competitive rangeland weed.
- Substitution and adulteration of herbal lots with other Artemisia or with non-Artemisia bitters.
- Regulatory seizure or reformulation of spirits that exceed thujone maxima, and of U.S. foods that are not thujone-free.
- Wildcrafting misidentification, especially with mugwort or with other silver Artemisia.
- Which of these failure modes and hazards hold for the sense of Artemisia absinthium 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.
- Vernacular names: English (grand) wormwood, French grande absinthe / absinthe, German Wermut, Spanish ajenjo, Italian assenzio maggiore, Slavic pelin; these names are sometimes applied loosely to other Artemisia.
- Absinthe was banned for much of the 20th century (Switzerland 1910-2005, United States 1912-2007, France from 1915 until reconstitution in the 2010s); legal practice and recipes still differ by jurisdiction because of thujone caps.
- Vermouth houses often prefer Roman wormwood (A. pontica) as the wormwood note, while absinthe specifies A. absinthium; the two are not interchangeable in trade.
- Native Eurasian-North African crop versus introduced, often weedy, North American populations.
- Not the East Asian materia-medica plants sold as wormwood in a loose English sense: Chinese qinghao is A. annua and moxa is chiefly A. argyi.
- Pelin wines and bitter liqueurs of the Balkans and Central Europe use local A. absinthium chemotypes that may be higher in thujone than Western herbal-drug crops.
- Which of these regional variation hold for the sense of Artemisia absinthium 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.
- Artemisia vulgaris (mugwort) - Mugwort leaves are green above and only white-tomentose beneath, with a different, less fiercely bitter aroma; A. absinthium is silvery-sericeous on both faces. Capitula and bitterness value (absinthin) separate pharmacognostic samples.
- Artemisia pontica (Roman wormwood) - Lower, rhizomatous plant (usually 20-60 cm) with finer foliage, used as the vermouth wormwood; not the Ph. Eur. Absinthii herba species. Habit plus accepted name on the seed or herb lot are the practical tests.
- Artemisia arborescens (tree wormwood) - Woody evergreen Mediterranean subshrub, not a herbaceous perennial; similar silver foliage but distinct growth form and oil profile. Check woodiness and provenance.
- Artemisia annua (sweet wormwood / qinghao) - Glabrous, sweet-camphor annual containing artemisinin, not absinthin; easily separated by life cycle, glabrous green leaves, and chromatographic marker (artemisinin vs absinthin/thujone).
- Tanacetum vulgare (tansy) - Also thujone-bearing, but has flat-topped yellow discoid heads and green, simply pinnatisect leaves; A. absinthium has nodding yellowish-brown capitula and silver 2-3-pinnatisect leaves.
- Artemisia absinthium garden hybrids sold as 'Powis Castle' (A. arborescens parentage) - Ornamental clones of mixed parentage are not equivalent to the herbal drug or absinthe botanical; treat as distinct unless the clone is documented A. absinthium.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of Artemisia absinthium this model covers, and on what evidence? provenance
Sources
- Species Plantarum, Artemisia absinthium - Carl Linnaeus, Laurentius Salvius, 1753 - Original valid publication of the binomial and the nomenclatural type of the species.
- European Pharmacopoeia, monograph Absinthii herba - EDQM, Council of Europe - Official herbal-drug identity, bitterness-value and essential-oil quality requirements used in European pharmacy.
- European Union herbal monograph and HMPC assessment report on Artemisia absinthium L., herba - European Medicines Agency - EU traditional-herbal indication (dyspepsia, temporary loss of appetite), posology, pregnancy contraindication and thujone-related safety limits.
- Regulation (EC) No 1334/2008 on flavourings and certain food ingredients with flavouring properties - European Parliament and Council, Official Journal of the EU - Binding EU maximum levels for thujone (α and β) in food and alcoholic beverages, including the higher cap for drinks produced from Artemisia species.
- 21 CFR 172.510 Natural flavoring substances and natural substances used in conjunction with flavors - U.S. Food and Drug Administration - U.S. food-additive listing of wormwood as a flavouring, with the finished food required to be thujone-free.
- Plants of the World Online, Artemisia absinthium L. - Royal Botanic Gardens, Kew - Accepted taxonomic status, native and introduced range, and placement in Asteraceae.
- Flora of North America, treatment of Artemisia absinthium - Flora of North America Editorial Committee - Morphological diagnosis against North American Artemisia, chromosome number, and status as an introduced weed.
- Thujone - Cause of absinthism? (and related absinthe reviews) - Dirk W. Lachenmeier and co-authors, Forensic Science International / Critical Reviews in Food Science and Nutrition - Measured thujone levels in historical and modern absinthe, and the reassessment of 'absinthism' versus ethanol toxicity.
What the second pass must settle
- Which regional lookalikes must the identification workflow cover, and what evidence is sufficient when flowers or basal leaves are missing?
- What locally validated observations distinguish normal seasonal dieback from damaging moisture stress, disease or crown death?
- How persistent are seeds and surviving plant parts under local conditions, and what follow-up duration demonstrates successful containment?
- What sampling design and analytical methods adequately represent variation in thujone across plant parts, developmental stages and collected lots?
- Which current local restrictions and preparation-specific standards govern cultivation, movement, collection and intended uses in the deployment jurisdiction?