Discussion of the morphology and distribution ofRorippa microphylla (Cruciferae)and related taxa from the Iberian Península

[摘要] A morphological and chorological study ofRorippa microphylla ,R. nasturtium-aquaticumandR. x sterilisin the Iberian Península was carried out. The number of areolae per side on the seed coat is confirmed as the best distinguishing character between these taxa. The length of the atiricies in caulinar leaves is also pointed out as a valuable trait.R. microphyllareaches in the center of the Iberian Península the southernmost and only Mediterranean localities of this species in Europe. BothR. microphyllaandR. nasturtium-aquaticumform part of two types of communities of flowing waters, one in which decumbent helophytes of shallow waters domínate, and the other dominated by erect helophytes of somewhat deeper waters.

[学科分类] 植物学

[关键词] Cruciferae;Arabideae;Rorippa;watercress;morphology;chorology;Iberian Península