part_of part of part of trunk 2026-09-18 no_EQ_quality_definition A stem that is the single dominant, persistent, self-supporting main axis of a tree-form plant, extending from ground level and bearing the principal branches. Approved FLOPO botanical concept proposal PO-CAND:trunk (curation/botanical_concept_proposals.tsv, curator decision accept_with_revision on 2026-09-18). Provisional FLOPO-local representation of a class proposed to PO (curation/upstream_drafts/po-pr-5-anatomy-classes.md); replace it with the PO identifier via IAO:0100001 once assigned. No PO or PATO identifier is minted locally. whole plant stem