Angiosperms (Flowering Plants) • Earth.com

Lanceleaf anemone

(Anemone lancifolia)

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en

Description

Anemone is a genus of flowering plants in the buttercup family Ranunculaceae. Plants of the genus are commonly called windflowers. They are native to the temperate and subtropical regions of all continents except Australia, New Zealand and Antarctica. The genus is closely related to several other genera including Anemonoides, Anemonastrum, Hepatica, and Pulsatilla. Some botanists include these genera within Anemone. Anemone are perennials that have basal leaves with long leaf-stems that can be upright or prostrate. Leaves are simple or compound with lobed, parted, or undivided leaf blades. The leaf margins are toothed or entire. Flowers with 4–27 sepals are produced singly, in cymes of 2–9 flowers, or in umbels, above a cluster of leaf- or sepal-like bracts. Sepals may be any color. The pistils have one ovule. The flowers have nectaries, but petals are missing in the majority of species. The fruits are ovoid to obovoid shaped achenes that are collected together in a tight cluster, ending variously lengthened stalks; though many species have sessile clusters terminating the stems. The achenes are beaked and some species have feathery hairs attached to them. Anemone was named by Carl Linnaeus in 1753 and is situated in the tribe Anemoneae, subfamily Ranunculoideae, and the family Ranunculaceae. As considered in the broader sense (sensu lato) the genus is sometimes considered to include a number of other genera, such as Anemonoides, Anemonastrum, Hepatica, Pulsatilla, Knowltonia, Barneoudia, and Oreithales. Several of these were included as separate genera within Anemoneae by Wang et al., a tribe with six genera in total. Early molecular analyses divided the genus into two subgenera (Anemonidium and Anemone), with seven sections, and 12 informal subsections. Ziman and colleagues (2008) treated the genus Anemone as 5 subgenera, 23 sections, 4 subsections, 23 series and about 118 species. A further reclassification by Hoot and colleagues (2012) estimated 200 species. Hoot et al. found many of the previously defined subdivisions, based on morphological characteristics were polyphyletic or paraphyletic. In contrast two clearly defined monophyletic clades emerged corresponding to the above two subgenera. Anemonidium demonstrated four subclades, corresponding to sections. The larger subgenus Anemone showed a similar pattern.

Taxonomic tree:

Domain:
Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Order:Ranunculales
Family:Ranunculaceae
Genus:Anemone
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