Biology:Pentactina

From HandWiki

Pentactina is an oligotypic genus of flowering plants in the family Rosaceae, first described by the Japanese botanist Takenoshin Nakai in 1917.[1][2] The genus occurs in restricted areas of North Korea and the Russian Far East.[2]

Description

Shrub deciduous. Leaves alternate, simple, without stipules. Inflorescence a terminal panicle. Flower calyx 5-lobed, calyx lobes reflexed during flowering; petals 5, white, linear; stamens 20; carpels 5; ovules 2 per carpel. Fruit follicles, dorsiventrally dehiscent.[3]

Classification

Taxonomic history

Pentactina was long considered a monotypic genus, represented by its type species Pentactina rupicola Nakai,[4] 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.[3] 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][2]

  • Pentactina rupicola Nakai[4] — 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.[3][11]

References

  1. ↑ 1.0 1.1 Cite error: Invalid <ref> tag; no text was provided for refs named Pentactina
  2. ↑ 2.0 2.1 2.2 "Pentactina Nakai | Plants of the World Online | Kew Science" (in en). https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:33943-1. 
  3. ↑ 3.0 3.1 3.2 Yakubov, V. V. (2014). "The genera Pentactina and Geum (Rosaceae) in the Russian Far East". V. L. Komarov Memorial Lectures 62: 229–240. https://www.biosoil.ru/en/kr/Publication/843. 
  4. ↑ 4.0 4.1 Cite error: Invalid <ref> tag; no text was provided for refs named Pentactina rupicola
  5. ↑ Hutchinson, J. (1964). The Genera of Flowering Plants. Vol. 1. Dicotyledones. Oxford: Clarendon Press. 
  6. ↑ Kalkman, C. (2004). "Rosaceae". in Kubitzki, K.. The Families and Genera of Vascular Plants, Vol. VI. Flowering Plants; Dicotyledons; Celastrales, Oxalidales, Rosales, Cornales, Ericales.. Berlin: Springer. pp. 343–386. ISBN 9783662072578. 
  7. ↑ Lee, C.; Hong, S.-P. (2011). "Phylogenetic relationships of the rare Korean monotypic endemic genus Pentactina Nakai in the tribe Spiraeeae (Rosaceae) based on molecular data" (in en). Plant Systematics and Evolution 294 (3): 159–166. doi:10.1007/s00606-011-0457-8. ISSN 1615-6110. https://doi.org/10.1007/s00606-011-0457-8. 
  8. ↑ Song, J.-H.; Roh, H.-S.; Hong, S.-P. (2020). "Petal micromorphology and its systematic implications in Rosaceae tribe Spiraeeae" (in en). Brittonia 72 (2): 111–122. doi:10.1007/s12228-020-09609-w. ISSN 1938-436X. https://doi.org/10.1007/s12228-020-09609-w. 
  9. ↑ 9.0 9.1 "Pentactina schlothauerae (Vorosch. & Ignatov) Jakubov". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew. https://www.ipni.org/n/77321707-1. 
  10. ↑ Kostikova, V.A. (2018). "Phenolic compounds in Pentactina schlothauerae (= Spiraea schlothauerae)". Proceedings of Universities Applied Chemistry and Biotechnology 8 (1): 74–81. doi:10.21285/2227-2925-2018-8-1-74-81. ISSN 2227-2925. https://journals.istu.edu/izvestia_biochemi/journals/2018/01/articles/08. 
  11. ↑ 11.0 11.1 Jeon, J.-H.; Kim, S.-H.; Marchuk, E. A.; Koldaeva, M. N.; Kim, S.-C. (2025). "A taxonomic revision of the rare genus Pentactina (Rosaceae) based on comparative phylogenetic analyses" (in English). Korean Journal of Plant Taxonomy 55 (1): 1–13. doi:10.11110/kjpt.2025.55.1.1. ISSN 1225-8318. http://www.e-kjpt.org/journal/view.php?doi=10.11110/kjpt.2025.55.1.1. 

Wikidata ☰ {{{from}}} entry



Retrieved from "https://handwiki.org/wiki/index.php?title=Biology:Pentactina&oldid=4249332"