{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.plant-stem","code":"thing-q134267","url":"https://ver.cy/models/thing/q134267/","name":"plant stem","alternateNames":["ramet","galangal","tiller","gynophore","caudex","blackberry stalk","straw","phylloclade","Pseudobulb","pedicel","rhizome","stipe"],"kind":"thing","status":"published","version":"0.2.0-wave.1","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 structural axis of a vascular plant, whether main or lateral, that bears leaves, buds and flowers and conducts water, nutrients and sugars, either herbaceous or woody; modified stems include rhizomes such as galangal, tubers, stolons, corms and caudices.","purpose":"Let an agent explain plant stems by structure, function, types and modifications, and support gardening, propagation and plant identification.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Bears leaves and buds","Has nodes and internodes","Conducts water and sugars","Can store food"],"structure":{"bundles":[{"id":"structure","name":"Structure","description":"Anatomy.","layers":[{"id":"parts","name":"Parts","description":"Nodes and tissues.","findings":[{"id":"parts-finding","name":"Parts","description":"Stem parts.","questions":[{"text":"What are nodes, internodes, xylem and phloem in this stem?","kind":"definition"},{"text":"How does woody growth differ?","kind":"definition"}]}]},{"id":"transport","name":"Transport","description":"Water and sugars.","findings":[{"id":"transport-finding","name":"Transport","description":"Transport.","questions":[{"text":"How do stems move water up and sugars around the plant?","kind":"definition"},{"text":"What drives the flow?","kind":"definition"}]}]}]},{"id":"types","name":"Types","description":"Modifications.","layers":[{"id":"underground","name":"Underground","description":"Rhizomes and tubers.","findings":[{"id":"underground-finding","name":"Underground","description":"Underground stems.","questions":[{"text":"Is this structure a rhizome, tuber, corm or root?","kind":"definition"},{"text":"How can it be told apart?","kind":"definition"}]}]},{"id":"grasses","name":"Grasses","description":"Tillers.","findings":[{"id":"grasses-finding","name":"Grasses","description":"Tillers.","questions":[{"text":"What are tillers in grasses and cereals?","kind":"definition"},{"text":"How do they affect yield?","kind":"provenance"}]}]}]},{"id":"gardening","name":"Gardening","description":"Propagation and care.","layers":[{"id":"cuttings","name":"Cuttings","description":"Stem cuttings.","findings":[{"id":"cuttings-finding","name":"Cuttings","description":"Stem cuttings.","questions":[{"text":"How can this plant be propagated from stem cuttings?","kind":"action"},{"text":"When is the best time?","kind":"provenance"}]}]},{"id":"problems","name":"Problems","description":"Stem damage.","findings":[{"id":"problems-finding","name":"Problems","description":"Stem problems.","questions":[{"text":"What is causing this stem rot, canker or damage?","kind":"definition"},{"text":"What treatment do horticultural sources suggest?","kind":"provenance"}]}]}]},{"id":"safety","name":"Safety","description":"Invasives and sap.","layers":[{"id":"invasive","name":"Invasive","description":"Invasive plants.","findings":[{"id":"invasive-finding","name":"Invasive","description":"Invasive plants.","questions":[{"text":"Could stem fragments spread an invasive plant such as knotweed?","kind":"boundary"},{"text":"What disposal rules apply?","kind":"provenance"}]}]},{"id":"sap","name":"Sap","description":"Irritant sap.","findings":[{"id":"sap-finding","name":"Sap","description":"Irritant sap.","questions":[{"text":"Does this plant have irritant or phototoxic sap?","kind":"provenance"},{"text":"What should be done after skin or eye contact?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Identify and describe plant stems and their modified forms.","Report stem damage, disease or pests to growers."],"mustNot":["Cut or damage stems of protected or wild plants without authority.","Identify stems or tubers as edible without certainty.","Move plant material across borders against plant health rules."],"requiresHuman":["Harvesting rhizomes or tubers from wild populations."]},"ethics":{"considerations":["Misidentifying edible stems and tubers can poison people.","Wild plants and their habitats can be harmed by careless harvesting."],"affectedParties":["Foragers and eaters","Growers","Wild plant populations"]},"owners":{"steward":"The owner of the land or crop; nature authorities for protected species.","roles":[],"masterSystems":[]},"relations":[{"target":"Q2668103","type":"parent","note":"registry parent class"},{"target":"vegetative organ","type":"related","note":"category"},{"target":"xylem and phloem","type":"contains","note":"tissues"},{"target":"potato tuber","type":"related","note":"modified stem"},{"target":"fruit tree","type":"related","note":"woody plant"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.plant-stem","Wikidata: Q134267 (https://www.wikidata.org/wiki/Q134267)"]},"properties":{"applicability":"required","items":["Stem length:  metres - Measure along the stem axis between specified endpoints because dimensions vary widely with species and growth stage.","Stem diameter:  millimetres - Measure across the stem at a recorded position and record multiple widths when the cross section is irregular.","Fresh mass:  grams - Weigh a defined stem sample before drying and record its sampling boundaries and hydration condition."]},"recognition":{"applicability":"required","items":["Nodes and buds","Rhizomes and tubers as underground stems","Roots lack nodes and leaves","Green or woody axes with nodes, internodes, buds and leaves."]},"capabilities":{"applicability":"required","items":["identify stem types and modifications","explain xylem and phloem transport","propagate plants from stem cuttings","recognise stem problems in plants"]},"hazards":{"applicability":"required","items":["Stem rots and diseases","Spreading invasive plants from stem fragments","Sap irritation from some species"]},"interfaces":{"applicability":"required","items":["Plant health rules for moving plant material"]},"context":{"applicability":"required","items":["Support, transport and storage in plants.","herbaceous stems","woody stems","rhizomes and stolons","tubers and corms","tillers and caudices"]}},"sources":[{"title":"Wikidata item Q134267: plant stem","url":"https://www.wikidata.org/wiki/Q134267","note":"identity and sense of the item"},{"title":"Wikipedia: Plant stem","url":"https://en.wikipedia.org/wiki/Plant_stem","note":"general description of the item"}],"openQuestions":["Should stem modifications be separate entries?","How should botanical glossaries be linked?","How should invasive species be linked?"],"resources":{"spec":"/models/things/publications/thing-q134267/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q134267/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T14:24:28Z","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 2026-10-08T18:54:36+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}