like the 'Pugster Blue', produce deep indigo-blue flowers, while others lean more true purple, red, white, pink, or yellow. Butterfly bushes grow well in hardiness zones 5 to 10. Beardtongue ...

With no sightings in two years, the rare Ogasawara blue butterfly, named after its island chain natural habitat far south of Tokyo and designated a national natural treasure, is considered extinct ...