bells blooming broomrape Digitalis flourish flower flowering plant flowers foxglove garden garden scene gardening Germanders green groundcover magenta medicinal monkshood nature plant plants purple Purple loosestrife summer verbascum beardtongue digitalis plant pink Terrestrial plant colourful white floral grass meadow sky sun biennial plant shrub stamens white flowers White foxglove biennial common foliage glove herbaceous lady perennial purpurea rosette saavem Scrophulariaceae tight woolly