stem erect, scabrous, branched above, very leafy; leaves sessile, subopposite or ternate, linear, subpilose, scabrous with revolute margins, spreading; pedicels axillary, 3–4 times longer than the leaf, appressed, hispid as well as the calyx-tube; lobes of calyx linear, acute, longer than the tube, 2–3 times shorter than the corolla. Perennial, 1/2–1 ft., scabrous-hairy, simple or a few-branched. Leaves longer than the intervals, mucronulate or acute, 4–6 lines long, rarely 1 line wide, the lower smaller, often broader, the uppermost sometimes 1 in. long, not 1 l. wide. Peduncles 1–3 inches long. Calyx-tube obconical or obovoid; lobes reflexed, at flowering time 2 lines long. Segments of corolla ovate, acute. Capsule obovoid or hemispherical, rarely obconical, attenuate at the base, 10-nerved.
