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Temporal range: Early Cretaceous – Recent
Creeping butercup close 800.jpg
Ranunculus repens
Scienteefic clessification
Kinrick: Plantae
(unranked): Angiosperms
(unranked): Eudicots
Order: Ranunculales

See text

Ranunculales is an order o flouerin plants. O necessity it contains the faimily Ranunculaceae, the buttercup faimily, because the name o the order is based on the name o a genus in that faimily. Ranunculales belongs tae a paraphyletic group kent as the basal eudicots. It is the maist basal clade in this group; in ether wirds, it is sister tae the remainin eudicots.

Taxonomy[eedit | eedit soorce]

The Angiosperm Phylogeny Group recognized seven faimilies in Ranunculales in their APG III system, published in 2009. In the preceding APG II system, they offered the option o three segregate faimilies as shown below.

Note: "+ ..." = optionally separate faimily (that mey be split aff frae the precedin faimily).

Unner this definition, well-kent memmers o Ranunculales include buttercups, clematis, columbines, delphiniums, an poppies.

The Cronquist system (1981) also recognised the order, but placed it in the subclass Magnoliidae, in class Magnoliopsida [= dicotyledons]. It uised this circumscription:

In the Cronquist system, the Papaveraceae an Fumariaceae (includin the plants in the optional faimily Pteridophyllaceae) were treatit as a separate order Papaverales, placed in this same subclass Magnoliidae. The Cronquist circumscription o Ranunculales is nou kent tae be polyphyletic. Sabiaceae is in a clade o basal eudicots separate frae Ranunculales. Coriariaceae is now placed in the order Cucurbitales.

A phylogeny o Ranunculales wis published in 2009, based on molecular phylogenetic analysis o DNA sequences. The authors o this paper revised the subfaimilies an tribes o the order.[1]

References[eedit | eedit soorce]

  1. Wei Wang; An-Ming Lu, Yi Ren, Mary E. Endress, and Zhi-Duan Chen (2009). "Phylogeny and Classification of Ranunculales: Evidence from four molecular loci and morphological data". Perspectives in Plant Ecology, Evolution and Systematics. 11 (2): 81–110. doi:10.1016/j.ppees.2009.01.001.  Unknown parameter |coauthors= ignored (help)

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