These pages are a series of characterizations of all orders and families of extant angiosperms (flowering plants) and gymnosperms, i.e. all seed plants, as well as many of clades grouping families and orders and some smaller clades, especially within larger families; non-seed plants are covered more briefly.

被子植物APG IV分類法是由被子植物種系發生學組（Angiosperm Phylogeny Group，簡稱APG）開發的第4版本的一個現代的，主要是基於分子的被子植物（開花植物）的植物分類學系統。

APG IV系统是由APG（“被子植物系统发育研究组”的英文Angiosperm Phylogeny Group的缩写）建立的被子植物分类系统的第四版，于2016年发表在《林奈学会植物学报》（Botanical Journal of the Linnean Society）上，是一个基本建立在分子系统发育研究之上的现代被子植物分类系统。

The APG IV system of flowering plant classification is the fourth version of a modern, mostly molecular-based, system of plant taxonomy for flowering plants (angiosperms) being developed by the Angiosperm Phylogeny Group (APG).

An update of the Angiosperm Phylogeny Group (APG) classification of the orders and families of angiosperms is presented. Several new orders are recognized: Boraginales, Dilleniales, Icacinales, Metteniusiales and Vahliales. This brings the total number of orders and families recognized in the APG system to 64 and 416, respectively.

Angiosperm phylogeny classification of flowering plants (APG IV) with the families organized alphabetically within orders. The Angiosperm Phylogeny Group IV system of flowering plant classification is the fourth version of a modern, mostly molecular-based, system of plant taxonomy for flowering plants (angiosperms) being developed by the ...

2023年9月26日 · APG IV系统共有64个目，416个科，数量比较适宜于应用和教学。 国际植物分类学界有不少人推荐使用APG IV系统代替传统的分类系统，作为学术研究和科学传播的基础工具和交流框架。 与APG IV系统针对的是被子植物类似，裸子植物以及石松植物和蕨类植物也有基于分子系统发育的新系统，即 克里斯腾许思 （Christenhusz）裸子植物系统和由蕨类植物系统发育研究组（Pteridophyte Phylogeny Group）提出的 PPG I系统。 参考文献：

APG IV提出的新分支，即蔷薇分支加上与其成姐妹群关系的虎耳草目（Saxifragales），锁阳科被放入虎耳草目。 蔷薇类分支 （rosids）:目一级保持稳定。 蔷薇类分支又分为两个分支：

An update of the Angiosperm Phylogeny Group (APG) classification of the orders and families of angiosperms is presented. Several new orders are recognized: Boraginales, Dilleniales, Icacinales, Metteniusiales and Vahliales. This brings the total number of orders and families recognized in the APG system to 64 and 416, respectively. We

apg iv系统介绍（一） 被子植物是现存高等植物最为繁盛的类群，约有30万种，也是陆地植被的主要组成部分。 因此，能够细致清楚地划分科（family）、属（genus）和种（species）的数量和范畴对认识全球和区域生物多样性…