Aster-like

Aster-like
Fever clover ( Menyanthes trifoliata )
Systematics
Class : Bedecktsamer (Magnoliopsida) Eudicotyledons Nuclear eudicotyledons Asterids Euasterids II Order : Aster-like
Scientific name
Asterales
Lindl.

Cornflower ( Centaurea cyanus ), daisy family (Asteraceae)

The aster-like (Asterales) are an order of the flowering plants (Magnoliopsida). It is one of the most species-rich orders of the flowering plants. Fossil finds have been known since the Oligocene , about 29 million years ago; so it is still a relatively new order.

description

There are far more herbaceous taxa than woody ones. There are never any stipules . The leaves are seldom simple, often serrated or notched, sometimes divided.

The flowers are usually five-fold. The petals are always fused ( sympetalie ). The fruits are capsule fruits or achenes .

Within this order, a tendency towards the formation of pseudanthia (false flowers), from radial symmetrical flowers to zygomorphic (mirror symmetrical) flowers, to adhesions in the stamen area , and to a reduction of the carpels from five to two can be observed.

Systematics

The aster-like are placed within the group of asterids named after them in the Euasterids II . The following families are included in the order :

• Alseuosmiaceae
• Argophyllaceae
• Daisy family (Asteraceae)
• Calyceraceae
• Bellflower Family (Campanulaceae) (including Lobeliaceae )
• Goodeniaceae (Goodeniaceae)
• Fever clover family (Menyanthaceae)
• Pentaphragmataceae
• Phellinaceae
• Rousseaceae
• Stylidiaceae (including Donatiaceae)

A simplified cladogram based on a work by Tachtadschjan (1997) describes the relationships within the Asterales as follows:

	Rousseaceae     Campanulaceae     Pentaphragmataceae     Alseuosmiaceae     Argophyllaceae     Phellinaceae     Stylidiaceae     Menyanthaceae     Goodeniaceae     Calyceraceae     Asteraceae

swell

• The order in APWebsite (Engl.)
• Information on the regulations from the University of Hamburg. (German)

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, No. 2, 2009, pp. 105-121, DOI: 10.1111 / j.1095-8339.2009.00996.x .
2. ↑ : The Asterales order on the AP website: [1]

Web links

Commons : Astern-like  - collection of images, videos, and audio files

• Entry in the Tree of Life project, version from January 1, 2002. (Eng.)