---
tag: TK324QZBPT
kind: concept
name: Subtree
sources:
  - wikipedia: en:325802@r1373839425
    locator: Glossary of graph theory, section S
    note: adopted
    mention: wikipedia://en/325802#30WE
    sections: [Summary]
inventory: [V91EH35D1H]
---

## Summary

A subtree is a connected subgraph of a tree. Sometimes, for rooted trees, subtrees are defined to be a special type of connected subgraph, formed by all vertices and edges reachable from a chosen vertex.