Digitalis purpurea (Foxglove): hardy, 3 to 5 ft., rosy-purple or white; beautifully spotted; the variety called gloxinioides has regular, erect flowers.
Echium pomponium: hardy, 4 ft., rosy-pink.
Hedysarum coronarium (French Honeysuckle): hardy, 2 to 3 ft., scarlet or white; fragrant.
Hesperis tristis (Night-scented Rocket): hardy, 3 ft., dull purplish; fragrant at night.
Lunaria biennis (Honesty): hardy, 2 to 3 ft., purple; the silvery dissepiment attractive among everlastings.
Matthiola incana (two groups, the Brompton and the Queen stocks): hardy, 2 to 2½ ft., white, red and purple.
Meconopsis. Charming members of the poppy family, of which M. aculeata, purple; M. grandis, purple; M. heterophylla, coppery-orange; M. nepalensis, golden yellow; M. integrifolia, yellow; M. simplicifolia, violet purple, are grown with care in sheltered spots, and in rich, very gritty soil.
Michauxia campanuloides, a remarkable bell flower, 3 to 8 ft. high, white tinged purple. Requires rich loam in warm sheltered spots.
Oenothera biennis and O. Lamarckiana (Evening primrose): hardy, 5 ft., bright yellow; large.
Scabiosa caucasica: hardy, 3 ft., blue, white.