PARTE UTILIZADA= Used part: Hojas, raíz.

ACCIÓN FARMACOLÓGICA= Pharmacological action: Diurético, antiofídico, antiartrítico.

COMPOSICIÓN QUÍMICA= Chemical composition: From the aerial parts of Conyza sophiaefolia a new alicyclic furan diterpene was isolated and characterized as an E-isomer in C6 of centipedic acid. In addition, the new clerodane type diterpene 12-epi-bacchotricuneatin A as well as two known related diterpenoids were identified. The flavone apigenine was also isolated. Structures were determined on the basis of spectroscopic evidence. 

ZONA GEOGRÁFICA= Geografical zone: Argentina.

DIVERSIDAD GENÉTICA Y MEJORAMIENTO DE PLANTAS MEDICINALES Medicinal plants and improvement of medicinal herbs

Complex geog. distribution patterns and agamospermy have united to obscure systematic relationships in the genus Erigeron (400+ species). Sequence data were analyzed from the internal transcribed spacer region of nrDNA (ITS) and 5.8S cistron for 77 taxa including 63 Erigeron species. Results support the North American origin of Erigeron and document that Aphanostephus, Conyza, and three small genera restricted to South America (Apopyros, Hysterionica, Neja) are all derived from within Erigeron. Phylogenetic data indicate that agamospermy has arisen at least three times in Erigeron and that autogamy has evolved independently in Conyza and in E. sect. Trimorpha.

1) TOURSARKISSIAN, Martín. Plantas medicinales de Argentina : sus nombres botánicos, vulgares, usos y distribución geográfica. Buenos Aires : Hemisferio Sur, 1980.

2) SIMIRGIOTIS, M. J., et al. Phytochemical Study Conyza Sophiaefolia. Antiinflammatory Activity. Molecules. 2000, vol.5, nº3, p.605-607.
     
3) NOYES, Richard D. Biogeographical and evolutionary insights on Erigeron and allies (Asteraceae) from ITS sequence data. Plant Systematics and Evolution. 2000, vol.220, nº1-2, p.93-114.