Circaeasteraceae

Circaeasteraceae
Systematics
Department : Vascular plants (tracheophyta) Subdivision : Seed plants (Spermatophytina) Class : Bedecktsamer (Magnoliopsida) Eudicotyledons Order : Buttercups (Ranunculales) Family : Circaeasteraceae
Scientific name
Circaeasteraceae
Hutch.

The Circaeasteraceae are a family of plants in the order buttercups (Ranunculales) within the flowering plants (Magnoliopsida). It contains two monotypical genera, so only two species. It has areas in the western and southwestern People's Republic of China , Japan and northern India .

description

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Vegetative characteristics

They are small, annual in Circaeaster agrestis and perennial in Kingdonia uniflora , herbaceous plants . The leaves have largely dichotomous veins.

Generative characteristics

They have small flowers . There are two to three or five (rarely up to seven) bracts , (one to) two to six (up to eight) stamens , three to nine free, upper carpels .

There are achenes formed.

Systematics and distribution

The surname Circaeasteraceae was established by John Hutchinson in The Families of Flowering Plants , Volume 1, p. 98 in 1926 . Sometimes you can find Kuntze ex Hutch as the author . , but this is not valid.

Since APG III 2009 it is no longer possible to separate Kingdonia into the Kingdoniaceae family.

In the family Circaeasteraceae there are only two monotypical genera, so only two species:

• Circaeaster Maxim. : It contains only one type (or two types):
  • Circaeaster agrestis Maxim. : It is common in Bhutan , northeast India , Nepal , Sikkim , southern Tibet and the Chinese provinces: southern Gansu , eastern and southern Qinghai , southern Shaanxi , western Sichuan , northwestern Xinjiang , eastern and northwestern Yunnan .
• Kingdonia Balf. f. & WWSm. (For some authors an independent family Kingdoniaceae ASFoster ex Airy Shaw ): It contains only one species:
  • Kingdonia uniflora I.B.Balf. & WWSm. : It thrives in forests at altitudes of 2700 to 3900 meters in the Chinese provinces: southern Gansu, southern Shaanxi (only in Taibai Shan), western Sichuan, northwestern Yunnan (only in Dêqên Xian).

swell

• The family of circaeasteraceae in APWebsite . (Sections Description and Systematics)
• The family of circaeasteraceae and the family of Kingdoniaceae at DELTA . (English)
• Circaeasteraceae in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. (Section systematics)

literature

• Dezhi Fu, Bryan E. Dutton: Circaeasteraceae. (Only the genus Circaeaster ) , p. 439 - online with the same text as the printed work, In: Flora of China. Volume 6.
• Kong Hong-zhi, Yang Qin-er: Karyomorphology and Relationships of the Genus Circaeaster Maxim. In: Acta Phytotaxonomica Sinica. Volume 35, Issue 6, 1997, pp. 494-499 ( PDF-Online. ).

Individual evidence

1. ↑ Angiosperm Phylogeny Group : An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III. In: Botanical Journal of the Linnean Society , Volume 161, Issue 2, 2009, pp. 105-121. doi : 10.1111 / j.1095-8339.2009.00996.x .
2. ↑ Angiosperm Phylogeny Group: An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV. In: Botanical Journal of the Linnean Society , Volume 181, 2016, pp. 1-20. doi : 10.1111 / boj.12385 .
3. ^ Circaeaster agrestis in the Flora of China : Online.
4. ↑ Fu Dezhi, Orbélia R. Robinson: Kingdonia in the Flora of China : Online.

Web links

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