Robuta

https://www.rhs.org.uk/plants/238638/verbena-rigida-intensity/details Verbena rigida 'Intensity' | slender vervain 'Intensity' Herbaceous Perennial/RHS verbena rigida slender vervain herbaceous perennial intensity rhs https://www.rhs.org.uk/plants/248615/verbena-rigida-f-lilacina/details Verbena rigida f. lilacina | /RHS verbena rigida f rhs