A plant family of the order Gentianales, subclass Asteridae, class Magnoliopsida.
Swertia
A plant genus of the family GENTIANACEAE. It is a source of swertiapuniside and IRIDOID GLYCOSIDES.
Gentiana
A plant genus of the family Gentianaceae whose members contain SECOIRIDOIDS and have been used in TRADITIONAL MEDICINE for suppressing INFLAMMATION.
Phylogeography
A field of study concerned with the principles and processes governing the geographic distributions of genealogical lineages, especially those within and among closely related species. (Avise, J.C., Phylogeography: The History and Formation of Species. Harvard University Press, 2000)
DNA, Ribosomal Spacer
The intergenic DNA segments that are between the ribosomal RNA genes (internal transcribed spacers) and between the tandemly repeated units of rDNA (external transcribed spacers and nontranscribed spacers).