{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.trifolium","code":"thing-q101538","url":"https://ver.cy/models/thing/q101538/","name":"Trifolium","alternateNames":["five-leaf clover","four-leaf clover"],"kind":"thing","status":"published","version":"0.2.0-wave.4","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.LIV"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A genus of about 250 to 300 species of plants in the legume family Fabaceae, known as clovers or trefoils, with leaves usually of three leaflets, dense flower heads and root nodules that host nitrogen-fixing Rhizobium bacteria, including white clover Trifolium repens and red clover Trifolium pratense, important forage and green manure crops; four-leaf and rarer five-leaf clovers are mutations or variants of normally three-leaflet leaves, with four-leaf clovers traditionally considered lucky. Some clovers can cause bloat in grazing animals, and plants called sweet clover belong to a different genus, Melilotus.","purpose":"Let an agent explain Trifolium, relay botany, agricultural uses, nitrogen fixation and folklore from botanical and agronomy sources, describe four- and five-leaf clovers, and distinguish Trifolium from wood sorrel Oxalis, sweet clover Melilotus, shamrock as a symbol and medick Medicago.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Trifoliate leaves","Nitrogen fixation","Forage value","Folklore"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What Trifolium is.","layers":[{"id":"definition","name":"Definition","description":"Definition.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What is Trifolium, and how does it differ from Oxalis, Melilotus, Medicago and the shamrock symbol?","kind":"definition"},{"text":"Is the question about farming, gardening, livestock bloat, which needs a vet, or folklore?","kind":"boundary"}]}]},{"id":"leaves","name":"Leaves","description":"Four- and five-leaf clovers.","findings":[{"id":"leaves-finding","name":"Leaves","description":"Leaves.","questions":[{"text":"Why do four- and five-leaf clovers occur?","kind":"definition"},{"text":"Which entry fits four-leaf clover?","kind":"action"}]}]}]},{"id":"botany","name":"Botany","description":"Botany.","layers":[{"id":"nitrogen","name":"Nitrogen","description":"Nitrogen fixation.","findings":[{"id":"nitrogen-finding","name":"Nitrogen","description":"Nitrogen.","questions":[{"text":"How do clover root nodules fix nitrogen?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"species","name":"Species","description":"Species.","findings":[{"id":"species-finding","name":"Species","description":"Species.","questions":[{"text":"How do white, red and crimson clover differ?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]}]},{"id":"agriculture","name":"Agriculture","description":"Agriculture.","layers":[{"id":"forage","name":"Forage","description":"Forage.","findings":[{"id":"forage-finding","name":"Forage","description":"Forage.","questions":[{"text":"How is clover used in pastures, and how do farmers manage bloat?","kind":"provenance"},{"text":"Which entry fits bloat (livestock)?","kind":"action"}]}]},{"id":"pollinators","name":"Pollinators","description":"Pollinators.","findings":[{"id":"pollinators-finding","name":"Pollinators","description":"Pollinators.","questions":[{"text":"Why is clover valuable for bees in lawns and pastures?","kind":"provenance"},{"text":"Which entry fits bee lawn?","kind":"action"}]}]}]},{"id":"context","name":"Context","description":"Culture.","layers":[{"id":"luck","name":"Luck","description":"Lucky clovers.","findings":[{"id":"luck-finding","name":"Luck","description":"Luck.","questions":[{"text":"Where does the belief in lucky four-leaf clovers come from?","kind":"provenance"},{"text":"Which entry fits good luck charm?","kind":"action"}]}]},{"id":"shamrock","name":"Shamrock","description":"Shamrock.","findings":[{"id":"shamrock-finding","name":"Shamrock","description":"Shamrock.","questions":[{"text":"Which plants are identified as the shamrock?","kind":"provenance"},{"text":"Which entry fits shamrock?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Identify clovers by leaves, flower heads and growth form, and tell them from Oxalis.","Advise on clover as forage or green manure from agronomic sources."],"mustNot":["Recommend grazing livestock on lush clover without warning of the risk of bloat.","Recommend planting clover species where they are listed as invasive.","Confuse Oxalis or other three-leaved plants with Trifolium.","Sell ordinary clover as a rare four-leaf or five-leaf charm under false claims."],"requiresHuman":["Introducing a clover species to a new region or protected area."]},"ethics":{"considerations":["Clover supports pollinators and soil fertility, but can displace native plants where introduced.","Livestock welfare depends on managing clover-rich pastures carefully."],"affectedParties":["Grazing livestock","Farmers","Native plant communities"]},"owners":{"steward":"Nobody owns the genus; landholders manage the plants on their land.","roles":[],"masterSystems":["Plant taxonomic databases"]},"relations":[{"target":"Q11992872","type":"parent","note":"registry parent class"},{"target":"useful plant","type":"related","note":"in registry terms"},{"target":"Fabaceae","type":"related"},{"target":"Rhizobium","type":"related"},{"target":"Oxalis","type":"related"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.trifolium","Wikidata: Q101538 (https://www.wikidata.org/wiki/Q101538)","scientific name: Trifolium L. genus"]},"properties":{"applicability":"required","items":["species: about 250-300 count","four-leaf frequency: about 1 in 5,000 note - often cited estimate","family: Fabaceae taxon"]},"recognition":{"applicability":"required","items":["Clover genus","Five-leaf clover, four-leaf clover, clover, trefoil","Oxalis has heart-shaped leaflets; Melilotus has tall spikes; shamrock is a symbol of Ireland; Medicago has spiral pods","Low plants with three-leaflet leaves and round white, pink or red flower heads."]},"capabilities":{"applicability":"required","items":["explain botany and nitrogen fixation","relay agricultural uses","describe four- and five-leaf clovers","distinguish look-alike plants"]},"hazards":{"applicability":"required","items":["Bloat in grazing livestock","Confusing clover with Oxalis","Invasive spread in some regions"]},"interfaces":{"applicability":"required","items":["Seed certification rules","Plant variety protection"]},"context":{"applicability":"required","items":["Forage, soil improvement and pollinator support.","white clover","red clover","crimson clover","subterranean clover","alsike clover"]}},"sources":[{"title":"Wikidata item Q101538: Trifolium","url":"https://www.wikidata.org/wiki/Q101538","note":"identity and sense of the item"},{"title":"Wikipedia: Clover","url":"https://en.wikipedia.org/wiki/Clover","note":"general description of the item"}],"openQuestions":["Should four-leaf clover be a separate entry?","How should agronomy sources be linked?","Should key species be linked?"],"resources":{"spec":"/models/things/publications/thing-q101538/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q101538/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T22:21:40Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-06T19:51:53+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}