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Phalaenopsis (/ ˌ f æ l ɪ ˈ n ɒ p s ɪ s /), also known as moth orchids, [2] is a genus of about seventy species of plants in the family Orchidaceae.Orchids in this genus are monopodial epiphytes or lithophytes with long, coarse roots, short, leafy stems and long-lasting, flat flowers arranged in a flowering stem that often branches near the end.
Aeridinae contains the largest diversity of leafless taxa within the tribe Vandeae. These leafless species of the genera Chiloschista, Phalaenopsis, and Taeniophyllum (syn. Microtatorchis [7]), which is the most species rich genus of Aeridinae with 245 accepted species, [8] exhibit reduced stems and enhanced importance and photosynthetic function of the root system.
The term monophyly, or monophyletic, derives from the two Ancient Greek words μόνος (mónos), meaning "alone, only, unique", and φῦλον (phûlon), meaning "genus, species", [4] [5] and refers to the fact that a monophyletic group includes organisms (e.g., genera, species) consisting of all the descendants of a unique common ancestor.
The following is a list of intergeneric hybrids recognised by the Royal Horticultural Society that includes species of Phalaenopsis as ancestors, as at February 2022: [6]. × Aeridopsis (Aerides × Phalaenopsis)
In biological phylogenetics, a clade (from Ancient Greek κλάδος (kládos) 'branch'), also known as a monophyletic group or natural group, [1] is a grouping of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. [2]
The chromosome count is 2n = 2x = 34. It is reduced, just like in species of Phalaenopsis section Aphyllae. The karyotype is symmetrical and uniform in size. It is clear, that Phalaenopsis finleyi is closely related to Phalaenopsis section Aphyllae. Together they form a monophyletic clade. A synapomorphy is the reduction of the chromosome count.
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The subtribe Angraecinae is a well supported, monophyletic group under the inclusion of Aerangidinae. Separating these groups would make them polyphyletic. [7] [8] The divergence time of Vandeae has been estimated to be 25.31 Mya. [1]