Clonal Plasticity in Response to Partial Neutral Shading in the Stoloniferous Herb Potentilla reptans var. sericophylla Clonal Growth and Clonal Morphology of Potentilla reptans var. sericophylla in Forest Understorey and Gap Phenotypic Plasticity in Response to Salinity Gradient in a Stoloniferous Herb Halerpestes ruthenica (in English)