Ptilotus
| Ptilotus | |
|---|---|
| File:Ptilotus rotundifolius.jpg | |
| Ptilotus rotundifolius (F.Muell.) F.Muell. | |
| Scientific classification Edit this classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Amaranthaceae |
| Subfamily: | Amaranthoideae |
| Genus: | Ptilotus R.Br.[1] |
| Species[1] | |
|
125; see List of Ptilotus species | |
| Synonyms[1] | |
| |
Ptilotus is a genus of approximately 125 species of flowering plants in the family Amaranthaceae, and is endemic to Australia, apart from Ptilotus conicus[2] that also occurs in Malesia. Plants in the genus Ptilotus are annual or perennial herbs or shrubs with usually hairy spikes of compact spherical, oval or cylindrical flowers.
Description
[edit | edit source]Plants in the genus Ptilotus are annual or perennial herbs or small shrubs, many covered with soft hairs. The leaves are arranged alternately, sometimes on branches and/or in a rosette at the base. The flowers are bisexual and borne in compact spherical to oval or cylindrical spikes, each flower with a membranous bract and two bracteoles at the base. There are five, equal, hairy, linear tepals and five stamens, sometimes up to three stamens reduced to sterile staminodes, fused into a cap surrounding the ovary. The fruit is a nut or utricle, surrounded by the remains of the perianth.[3][4][5]
Taxonomy
[edit | edit source]The genus Ptilotus was first formally described in 1810 by Robert Brown in his Prodromus Florae Novae Hollandiae.[6][7] The genus name means 'winged', particularly 'soft winged'.[8]
In family-level phylogenetic studies, Ptilotus has been placed within a clade informally known as the 'aervoids'.[9] It has been resolved as monophyletic and is closely related to Aerva Forssk.[10][11]
Species list
[edit | edit source]Distribution
[edit | edit source]Most species of Ptilotus occur in arid parts of Western Australia,[5][10][12] but there are species in the Northern Territory, Queensland, South Australia, New South Wales, Victoria and Tasmania.[13]
Gallery
[edit | edit source]-
Ptilotus exaltatus Nees
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Ptilotus obovatus (Gaudich.) F.Muell.
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Ptilotus eriotrichus (Gaudich.) F.Muell.
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Ptilotus stirlingii (Lindl.) F.Muell. subsp. stirlingii
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Ptilotus declinatus Nees
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Ptilotus fusiformis (R.Br.) Poir.
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Ptilotus nobilis (Lindl.) F.Muell
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Ptilotus latifolius R.Br.
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Ptilotus drummondii (Moq.) F.Muell.
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Ptilotus xerophilus T.Hammer & R.W.Davis
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Ptilotus rotundifolius (F.Muell.) F.Muell.
References
[edit | edit source]
- ^ a b c Ptilotus R.Br. Plants of the World Online. Retrieved 3 April 2024.
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