| Aylostera | |
|---|---|
 | |
| Aylostera deminuta | |
Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Cactaceae |
| Subfamily: | Cactoideae |
| Tribe: | Cereeae |
| Subtribe: | Aylosterinae |
| Genus: | Aylostera Speg. |
| Type species | |
| Aylostera deminuta | |
| Synonyms[1] | |
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Aylostera, is a genus ofcactus, native to central Bolivia and north western Argentina.[1]Aylostera was formerly sunk into a broadlycircumscribed genusRebutia, butmolecular phylogenetic studies from 2007 onwards showed that when defined in this way,Rebutia was notmonophyletic, leading to the resurrection ofAylostera. A 2023 classification of the tribeCereeae placed it as the only genus in the subtribeAylosterinae. It was formerly placed in the subtribeRebutiinae.
Aylostera species are small cacti with globular stems. The stems may or may not have ribs; this feature can vary even within a species. Their flowers are of various colours. A key feature that distinguishesAylostera fromRebutia is that thepericarpels andreceptacles (which together form a structure that is often referred to as the 'flower tube') are hairy, rather thanglabrous.[2]
The genusAylostera was erected byCarlo Luigi Spegazzini in 1923.[1] A historical summary of the treatment ofAylostera and related genera published in 2011 showed how in succession it was recognized, sunk intoRebutia, and then resurrected to include a large part ofRebutia.[3] A phylogenetic study in 2016 using both molecular and morphological characters confirmed thatAylostera was monophyletic and distantly related to the clade that contains the type species ofRebutia, thus justifying recognizing it as a separate genus.[2] The separate status ofAylostera is accepted byPlants of the World Online, as of December 2024[update].[1]
In a 2023 classification of the tribeCereeae, it was placed as the only genus in the subtribe Uebelmanniinae, having formerly been placed in the subtribeRebutiinae.[4]
The number of species accepted inAylostera varies considerably. The 2016 study of the genus accepted only nine species, including a very broadly circumscribedAylostera deminuta.[2] As of December 2024[update], Plants of the World Online accepted 26 species:[1]
| Image | Scientific name | Distribution |
|---|---|---|
 | Aylostera albiflora (F.Ritter & Buining) Backeb. | Bolivia. |
 | Aylostera albopectinata(Rausch) Mosti & Papini | Bolivia. |
 | Aylostera atrovirens (Backeb.) Mosti & Papini | Bolivia to Argentina |
 | Aylostera deminuta (F.A.C.Weber) Backeb. | Bolivia to Argentina |
 | Aylostera einsteinii (Frič) Mosti & Papini | Bolivia to Argentina |
 | Aylostera fiebrigii(Gürke) Backeb. | Bolivia to Argentina |
 | Aylostera flavistyla(F.Ritter) Mosti & Papini | Bolivia |
| Aylostera fusca(F.Ritter) Mosti & Papini | Bolivia. | |
 | Aylostera heliosa(Rausch) Mosti & Papini | Bolivia. |
| Aylostera hoffmannii(Diers & Rausch) Mosti & Papini | Bolivia to Argentina (Salta) | |
 | Aylostera kupperiana(Boed.) Backeb. | Bolivia (Tarija) |
| Aylostera leucanthema(Rausch) Mosti & Papini | Bolivia (Chuquisaca) | |
| Aylostera malochii (Slaba & Lad.Fisch.) Ritz | Bolivia. | |
| Aylostera mamillosa(Rausch) Mosti & Papini | Bolivia | |
| Aylostera mandingaensisR.Wahl & Jucker | Bolivia. | |
 | Aylostera muscula(F.Ritter & P.Thiele) Backeb. | Bolivia (Tarija) |
 | Aylostera narvaecenseCárdenas | Bolivia (Tarija) |
 | Aylostera nigricans(Wessner) Mosti & Papini | Argentina |
.jpg) | Aylostera perplexa(Donald) Mosti & Papini | Bolivia. |
 | Aylostera pseudominuscula(Speg.) Speg. | Bolivia to Argentina |
 | Aylostera pulvinosa(F.Ritter & Buining) Backeb. | Bolivia (Tarija) |
 | Aylostera pygmaea(R.E.Fr.) Mosti & Papini | Bolivia to Argentina |
 | Aylostera spinosissima(Backeb.) Backeb. | Bolivia. |
 | Aylostera steinmannii(Solms) Backeb. | Bolivia to Argentina |
 | Aylostera tarvitaensis(F.Ritter) Mosti & Papini | Bolivia. |
| Aylostera tuberosa(F.Ritter) Backeb. | Bolivia. |
Aylostera species are native toBolivia and north-westernArgentina.[1] They are found on thecordilleras to the east of theAndes, from17° south to26° south, in montane dry forests, shrublands anddry puna grasslands.[2]
Authority control databases: National |
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