<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31435634</termId><termName>Betulaceae</termName><termType>PT</termType><termNote><![CDATA[ Betulaceae is the birch family of flowering plants, usually placed in the order Fagales; some authorities, however, have placed the family in the order Betulales. The family contains six genera and 120-150 species. Although not done in this hierarchy, it is elsewhere sometimes divided into two subfamilies: Betuloideae, with the genera Betula (birch) and Alnus (alder); and Coryloideae, with the genera Carpinus (hornbeam), Corylus (hazel, or filbert), Ostrya, and Ostryopsis. ]]></termNote><termCreatedDate>2026-03-30 20:57:28</termCreatedDate><relation><relationType>UF</relationType><termId>31435635</termId><termName>birch family</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31409179</termId><termName>Fagales</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31454690</termId><termName>Alnus</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31454693</termId><termName>Betula</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31454695</termId><termName>Carpinus</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31454697</termId><termName>Ostrya</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31454701</termId><termName>Corylus</termName><termType>PT</termType></relation></term>  </Zthes>