同志们注意，回欢草已经升为科了

sunzeyu001

最近有几个很好的关于回欢草的帖子，其中都提到了“马齿苋科回欢草属”，其实到APG III就已经提升为回欢草科，APG IV也依然承认这个结论，所以以后不要再说回欢草属了，它已经升阶啦

抄一段Wiki（https://en.wikipedia.org/wiki/Anacampserotaceae）：
    The Anacampserotaceae are a family of plants proposed in the February 2010 issue of the journal Taxon. The family was described by Urs Eggli and Reto Nyffeler in their analysis of the polyphyly in the suborder Portulacineae (order Caryophyllales). The new family and its circumscription was based on molecular and morphological data. The three recognized genera - Anacampseros, Grahamia, and Talinopsis - were formerly placed in the Portulacaceae[1][2] and comprise a total of 36 known species.[3] This family was accepted in the Angiosperm Phylogeny Group's 2009 publication of the APG III system.[4]

注意“The family was described by Urs Eggli and Reto Nyffeler in their analysis of the polyphyly in the suborder Portulacineae (order Caryophyllales)”这句话表明了将回欢草独立成科的原因是原马齿苋科为并系群，不符合APG的分类原则（即不符合按演化分类的原则），把回欢草单拿出去才是正路。
(关于单系群并系群的科普：http://weibo.com/ttarticle/p/show?id=2309403990944650255649)

至于本帖为什么依然归类在马齿苋科的分类下呢……因为马齿苋科已经一分为五，这五个科都可以算是广义马齿苋科（Portulacaceae，或者也可以叫马齿苋亚目？）的一部分



PS：石竹目真是一个神奇的目，番杏仙人广义马齿苋都在里面。这个目下肉质化普遍存在不说，还有两类食虫——毛膏菜和猪笼草，真是适应恶劣环境的小能手。另外蓝雪科其实也是非常有意思的一个科，有几种很类似景天的植物，比如下图中的贵霜花（Bukiniczia cabulica）：

图片来自：http://www.phytograph.co.uk/b/bu/bukinicziacabulica/species.html

aaron17556

鼓掌❤啪啪啪``

brancusi

科普，谢谢

fangtooth

终于升级为科了真好啊。虽然我也不知道这是啥东西

泥巴a1

蘑菇