biennial plant Digitalis nature shrub stamens summer white flowers White foxglove biennial Caryophyllaceae Dianthus flowers garden grow petals pink red sweet William common flower foliage foxglove glove herbaceous lady perennial plant purple purpurea rosette saavem Scrophulariaceae tight woolly cow parsnip England english grasses Great Britain Heracleum sphondylium hogweed rural stems Umbelliferae umbels white wild wiltshire anthers blue florets hairy lanceolate leaves linear lobes narrow oblong plants stiffly stigmas violet beta carotene colorful colourful companion plant cut daucus carota dietary fibre fibre firm folate healthy inside lines orange popular raw root vegetable satisfying sativus skin sliced smooth snack sugar taproot tasty texture uncooked vegetable vitamin A widespread