Pentactina
Genus of flowering plants
From Wikipedia, the free encyclopedia
Pentactina is an oligotypic genus of flowering plants in the family Rosaceae, first described by the Japanese botanist Takenoshin Nakai in 1917.[1][3] The genus occurs in restricted areas of North Korea and the Russian Far East.[3]
| Pentactina | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Rosales |
| Family: | Rosaceae |
| Genus: | Pentactina Nakai (1917)[1] |
| Type species | |
| Pentactina rupicola Nakai (1917)[2] | |
Description
Classification
Taxonomic history
Pentactina was long considered a monotypic genus, represented by its type species Pentactina rupicola Nakai,[2] which is narrowly endemic to North Korea. Its taxonomic treatment was controversial due to the rarity and limited accessibility of P. rupicola: some botanists treated Pentactina as a synonym of the genus Spiraea L.,[5][6] while others supported its generic distinctiveness based on morphological and phylogenetic evidence.[7][8]
In 2014, Russian botanist V. V. Yakubov published a new combination, Pentactina schlothauerae (Vorosch. & Ignatov) Jakubov,[9] based on morphological comparisons, transferring the species from Spiraea.[4] A subsequent biochemical analysis supported this revision, showing that the phenolic compound composition of P. schlothauerae differed from that of Spiraea species.[10] A later phylogenetic study substantiated a sister relationship between P. rupicola and P. schlothauerae, forming a distinct lineage within the tribe Spiraeeae, separate from other genera including Spiraea.[11]
Species
The genus Pentactina currently comprises two species:[1][3]
- Pentactina rupicola Nakai[2] — native to North Korea
- Pentactina schlothauerae (Vorosch. & Ignatov) Jakubov [9] — native to the Russian Far East
Distribution
Pentactina rupicola is endemic to the Kumgangsan Mountains in North Korea, and P. schlothauerae is endemic to the Badzhal Range in the Russian Far East.[4][11]