Digitalis is a genus of about 20 species of herbaceous perennials, shrubs, and biennials commonly called foxgloves. (...) Digitalis toxicity (...) sometimes results in xanthopsia (jaundiced or yellow vision) and the appearance of blurred outlines (halos), drooling, abnormal heart rate, cardiac arrhythmias, weakness, collapse, dilated pupils, tremors, seizures, and even death.
Lily of the valley (Convallaria majalis), sometimes written lily-of-the-valley, is a highly poisonous woodland flowering plant with sweetly scented, pendent, bell-shaped white flowers borne in sprays in spring.