Stems 3–4 ft. high, apparently annual from a perennial woody rootstock, quite simple, rather stout, minutely puberulous. Leaves in whorls of three, or opposite in the upper part; petiole 1–4 lin. long; blade 3 1/2–5 1/2 in. long, 2–4 1/2 lin. broad, linear-lanceolate, acuminate, cuneately narrowed into the petiole at the base, margins revolute, glabrous on both sides or with the midrib puberulous beneath. Umbels pedunculate, lateral at the nodes along the upper part of the stem, 6–9-fLowered; peduncles 1/2–1 in. long, pedicels 9–10 lin. long, all puberulous or minutely tomentose. Sepals 2–2 1/2 lin. long, ovate-lanceolate, acuminate, puberulous. Corolla somewhat reflexed; lobes about 3 1/2 lin. long, 2 1/3 lin. broad, elliptic-ovate, acute, glabrous on both sides, ciliate along one margin. Coronal-lobes arising about 3/4 lin. above the base of the staminal-column and reaching its top, 1 1/3 lin. long, complicate-cucullate, ovate-oblong in side view, rounded on the back, subtruncate or truncate at the top, which is notched in front of the teeth reflexed from the apical angles of the inflexed sides; teeth very minutely erose-denticulate along the upper margin and sometimes entirely included within the cavity, or rising slightly above the top of the lobe, no median tooth or crest within. staminal-column 2–2 1/4 lin. long; anther-appendages semicircular, inflexed over the truncate apex of the style. Follicles 2 1/4–2 3/4 in. long, 7–9 lin. thick, ovoid-lanceolate, acuminate into a beak, setose, minutely tomentose, with puberulous setæ when young, puberulent or nearly glabrous when ripe. Ripe seeds not seen but apparently scrobiculate or minutely tuberculate.
