Psiadia, commonly known as daisy trees, is a genus of mostly woody Asian and African plants in the tribe Astereae within the family Asteraceae.[2][3] The genus is distributed throughout the Western Indian Ocean, with species reported from continental Eastern Africa, Madagascar, Mauritius, La Reunion, Rodrigues, the Comoro islands, as well as several of the smaller, uninhabited islands in the Mozambique Channel. Additional species are suspected on Socotra and Sri Lanka, but these have not been confirmed. Phylogenetic studies using DNA sequence data and biogeographic reconstruction using molecular dating have shown that the genus originated on the African mainland, and colonized Madagascar and the outlying islands in the Indian Ocean in several independent instances of overwater dispersal in the Miocene.[4]

Psiadia
Psiadia callocephala
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Tribe: Astereae
Subtribe: Eschenbachiinae
Genus: Psiadia
Jacq.
Type species
Psiadia glutinosa
Synonyms[1]
  • Alix Comm. ex DC.
  • Elphegea Less.
  • Frappieria Cordem.
  • Glycyderas Cass.
  • Glyphia Cass.
  • Henricia Cass.
  • Psiadiella Humbert
Species[1]
Formerly included[5]

see: Conyza Microglossa Pluchea

References

edit
  1. ^ a b "Psiadia Jacq". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 16 April 2024.
  2. ^ Jacquin NJ (1797). "plate 152: color illustration of Psiadia glutinosa". Plantarum Rariorum Horti Caesarei Schoenbrunnensis [Iconographia Imperial Garden Schoenbrunnensis] (in Latin). Vol. 2. pp. 13–14.
  3. ^ Jacquin NJ (1797). "Psiadia Jacq". Tropicos.org. Missouri Botanical Garden.
  4. ^ Strijk JS, Noyes RD, Strasberg D, Cruaud C, Gavory F, Chase MW, et al. (2012-08-10). "In and out of Madagascar: dispersal to peripheral islands, insular speciation and diversification of Indian Ocean daisy trees (Psiadia, Asteraceae)". PLOS ONE. 7 (8): e42932. Bibcode:2012PLoSO...742932S. doi:10.1371/journal.pone.0042932. PMC 3416790. PMID 22900068.
  5. ^ "Psiadia". Global Compositae Database. The International Compositae Alliance (TICA). 16 July 2021.