The eudicotyledons are a group of flowering plants , which includes a large part of the dicotyledons (= dicotyledons). According to the systematics of the Angiosperm Phylogeny Group , they are not a separate taxon and in terms of size they essentially correspond to the earlier class of three-furrow pollen dicotyledons .
The eudicotyledons have like the basal orders of the bedecktsamer two cotyledons . However, they lack their essential oils in idioblasts . The organs of the flower are in whorls . The pollen grains have three germinal furrows (are tricolpat) or are derived forms.
The eudicotyledons comprise a large part of the flowering plants. Her sister group are the Ceratophyllales .
They themselves are divided into two large groups, the rosids and asterids, at the base of which there are some orders. Within the eudicotyledons these are:
- Buttercups (Ranunculales)
- Silver tree-like (Proteales)
- Boxwood (Buxales)
The other eudicotyledons are often summarized in the so-called nuclear eudicotyledons, for example in APG III from 2009, but no longer in APG IV 2016, which is why they are no longer listed as a group here. The kernel eudicotyledons are characterized largely by five-fold flower covers, while the previous orders are quite variable here. They have tricolor pollen grains and contain ellagic acid .
The other groups of eudicotyledons are:
- Rose apple-like (Dilleniales)
- Saxifragales (Saxifragales)
- Sandalwoods (Santalales)
- Clove-like (Caryophyllales)
The eudicotyledon cladogram looks like this:
- ^ A b Andreas Bresinsky , Christian Körner , Joachim W. Kadereit , Gunther Neuhaus , Uwe Sonnewald : Textbook of Botany . Founded by Eduard Strasburger . 36th edition. Spektrum Akademischer Verlag, Heidelberg 2008, ISBN 978-3-8274-1455-7 , p. 869 ff .
- ↑ a b c d The Angiosperm Phylogeny Group : An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV . Botanical Journal of the Linnean Society, 2016, Volume 181, pp. 1-20. doi : 10.1111 / boj.12385
- ↑ 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 .