
The Portulacaceae are a family of flowering plants, comprising 115 species in a single genus Portulaca. Formerly some 20 genera with about 500 species, were placed there, but it is now restricted to encompass only one genus. It is also known as the purslane family. It has a cosmopolitan distribution, with the highest diversity in semiarid regions of the Southern Hemisphere in Africa, Australia, and South America, but with a few species also extending north into Arctic regions. The family is very similar to the Caryophyllaceae, differing in the calyx, which has only two sepals.
portlakväxter
FAMILY
屬 參見文本 马齿苋科[1](Portulacaceae) 双子叶植物,约19属,580种,广布于全球,美洲最多。肉质草本或亚灌木;叶互生或对生,全缘;花两性,辐射对称或左右对称;萼片通常2;花瓣4-5,稀更多,常早萎;雄蕊4至多枚,通常10枚;于房1室,上位或半下位至下位(Portulaca),有胚珠1至多颗,生于基生的中央胎座上;果为一蒴果。盖裂或2-3瓣裂。 APG II植物分類系統 (2003; 从1998年APG系统未改变的)分配它到核心真双子叶植物分支石竹目。2009年,被子植物APG III分类法從馬齒莧科中分出三個獨立的科,分別是土人參科(Talinaceae) 、回歡草科(Anacampserotaceae)和小雞草科(Montiaceae)。 选择的类 红娘花属(Calandrinia) 猫垫草属(Calyptridium) 猫爪花属(Cistanthe) 春美草属(Claytonia) 露薇花属(Lewisia)/离子苋 矿苣属(Montia) 夕落红属(Phemeranthus) 马齿苋属(Portulaca) 马齿苋树属(Portulacaria) 伞花马齿苋属(Spraguea) 拟土人参属(Talinopsis) 土人参属(Talinum) 注释 ^ 「莧」,拼音:xiàn,中古擬音:ghrenh 参考 维基共享资源中相关的多媒体资源:马齿苋科 Portulacaceae in L. Watson and M.J. Dallwitz (1992 onwards). The families of flowering plants Flora of North America: Portulacaceae Flora of China: Portulacaceae NCBI Taxonomy Browser links at CSDL 规范控制 NDL: 00972025 取自“https://zh.wikipedia.org/w/index.php?title=马齿苋科&oldid=36584512” 分类: 马齿苋科 植物科名 隐藏分类: 调用重复模板参数的页面 含有非中文內容的條目 本地相关图片与维基数据不同 包含NDL标识符的维基百科条目
via GBIF · Kew POWO
via PubMed
via Wikidata · CC0
The Portulacaceae are a family of flowering plants, comprising 115 species in a single genus Portulaca. Formerly some 20 genera with about 500 species, were placed there, but it is now restricted to encompass only one genus. It is also known as the purslane family. It has a cosmopolitan distribution, with the highest diversity in semiarid regions of the Southern Hemisphere in Africa, Australia, and South America, but with a few species also extending north into Arctic regions. The family is very similar to the Caryophyllaceae, differing in the calyx, which has only two sepals.
The APG II system (2003; unchanged from the APG system of 1998) assigns it to the order Caryophyllales in the clade core eudicots. In the APG III system, several genera were moved to the Montiaceae, Didiereaceae, Anacampserotaceae and Talinaceae, thus making the family monotypic and only containing the genus Portulaca.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).