PARTE UTILIZADA= Used part: Hojas y raíces frescas.

ACCIÓN FARMACOLÓGICA= Pharmacological action: Antiescrofulosa, depurativa, tónica.
 
POSOLOGÍA= Posology: Irritación producida por picaduras de ortiga. Coger unas hojas frescas y triturarlas. Extraer el jugo y aplicarlo sobre la zona de la piel afectada por la irritación. Repetir esta operación varias veces.

COMPOSICIÓN QUÍMICA= Chemical composition: Rumicina, resina, hierro, ácido.

ZONA GEOGRÁFICA= Geografical zone: Caminos de Santiago.

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

The genus Rumex includes hermaphroditic, polygamous, gynodioecious, monoecious, and dioecious species, with the dioecious species being represented by different sex-detg. mechanisms and sex-chromosome systems.  Therefore, this genus represents an exceptional case study to test several hypotheses concerning the evolution of both mating systems and the genetic control of sex detn. in plants.  Here, we compare nuclear intergenic transcribed spacers and chloroplast intergenic sequences of 31 species of Rumex.  Our phylogenetic anal. supports a systematic classification of the genus, which differs from that currently accepted.  In contrast to the current view, this new phylogeny suggests a common origin for all Eurasian and American dioecious species of Rumex, with gynodioecy as an intermediate state on the way to dioecy.  Our results support the contention that sex detn. based on the balance between the no. of X chromosomes and the no. of autosomes (X/A balance) has evolved secondarily from male-detg. Y mechanisms and that multiple sex-chromosome systems, XX/XY1Y2, were derived twice from an XX/XY system.  The resulting phylogeny is consistent with a classification of Rumex species according to their basic chromosome no., implying that the evolution of Rumex species might have followed a process of chromosomal redn. from x = 10 toward x = 7 through intermediate stages (x = 9 and x = 8).

1) ALFARO, Txumari, Plantas y remedios naturales de los caminos de santiago. Barcelona: B.S.A. 2008, p. 194.

2)  NAVAJES-PEREZ, Rafael, et al. The evolution of reproductive systems and sex-determining mechanisms within Rumex (Polygonaceae) inferred from nuclear and chloroplastidial sequence data.  Molecular Biology and Evolution. 2005, vol.22, nº9, p.1929-1939.