Bentley and Trimen, Med. Plants , 203.
Bracts subulate, outer ones as long as the calyx.
Pedicels quite smooth. Calyx 5-toothed, teeth hispid, subulate, erect. The corolla is 4-cleft, tubular, with the broadest segment emarginate. History, Description, and Chemical Composition. It grows wild in damp places and flowers from July to September.