PARTE UTILIZADA= Used part: Planta entera. 

ACCIÓN FARMACOLÓGICA= Pharmacological action: Oftálmico, diabetes, hepatitis, ictericia. 

COMPOSICIÓN QUÍMICA= Chemical composition: Chromatographic processing with different adsorbents of the chloroform soluble fractions obtained from the methanol extracts, allowed as to obtain the following compounds: Bidens subalternans: maslinic acid, oleanolic acid, stigmasterol (I), stigmasterol-3-O-beta;-Dglucoside (II)…. 

ZONA GEOGRÁFICA= Geografical zone: S. de Brasil, Paraguay, Uruguay, N. y Centro de Argentina. 

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

The chromosomal numbers of three species of Bidens were determined based on an analysis of somatic metaphases. The species studied were Bidens pilosa L., Bidens subalternans DC and Bidens alba (L.) DC, all of which belong to the Bidens pilosa species complex. The three species have a similar morphology: Bidens pilosa and B. subalternans are widely distributed in agricultural areas, in disturbed habitats and along roadsides, whereas B. alba occurs only along the seacoast. Bidens pilosa has n=72 and B. subalternans and B. alba has 2n=48. These numbers agreed with the basic chromosomal number of n=12 reported for the tribe Heliantheae and show that the number of metaphase chromosomes can be used to distinguish Bidens pilosa from the other two species of the B. pilosa complex in southeastern Brazil. 

ÚLTIMOS AVANCES EN LA QUÍMICA Y ACTIVIDADES BACTERIOLÓGICAS EN LAS PLANTAS MEDICINALES= Medicinal plants, last advances on chemistry and bacteria activities on the medicinal herbs

From the chromatog. resoln. of the chloroform sol. fraction of the MeOH ext. of Bidens subalternans, a plant used in folk medicine as an anti-inflammatory and analgesic agent, maslinic acid and stigmasterol 3-O-alpha-D-glucoside were isolated, together with oleanic acid and stigmasterol as minor components.  The anti-inflammatory properties of stigmasterol glucoside exerted the strongest effect after 3 h.

1) TOURSARKISSIAN, Martín. Plantas medicinales de Argentina : sus nombres botánicos, vulgares, usos y distribución geográfica. Buenos Aires : Hemisferio Sur, 1980, p.27.

2) ORTEGA, C.A.; GIANELLO, María; GIANELLO, J.C. Chemical Components and Biological Activity of Bidens Subalternans, B. Aurea (Astereaceae) and Zuccagnia Puntacta (Fabaceae). Molecules. 2000, vol.5, nº3, p.465-467.
 
3) GROMBONE-GUARATINI, M.T., et al. Chromosomal studies of three species of Bidens (L.) (Asteraceae). Caryologia. 2006, vol.59, nº1, p.14-18.
 
4) ORTEGA, Claudia A.; ROTELLI, Alejandra E.; GIANELLO, Jose C. Chemical components and anti-inflammatory activity from Bidens subalternans. Planta Medica. 1998, vol.64, nº8, p.778.