1) Bellflower 2) Bellflower or foxglove 3) Campanula 4) Campanula trachelium 5) Nettle-leaved bellflower 
• (n.) A plant (Campanula Trachelium) formerly considered a remedy for sore throats because of its throat-shaped corolla.
(from the article `bellflower`) ...leaves that form a rosette around the stalk. Rover, or creeping, bellflower (C. rapunculoides), a European plant named for its spreading rhizomes, ...
Throat'wort` noun (Botany) A plant ( Campanula Trachelium ) formerly considered a remedy for sore throats because of its throat-shaped corolla. 
[n] - European bellflower with blue-purple to lilac flowers formerly used to treat sore throat
nettle-leaved bellflower noun European bellflower with blue-purple to lilac flowers formerly used to treat sore throat