Stem erect, 3–4 ft. high, stiff, branched from the base, terete, slender, like the whole plant finely and spreadingly pubescent with few glands among the hairs, at length glabrescent below; branches long, rigid. Leaves oblong-lanceolate or lanceolate to linear, rounded or subretuse at the apex, cuneate at the base, quite entire, lower up to 1 1/4 in. long and 1/4 in. broad, upper much shorter and narrower, pale below; petiole 2– 1/2 lin. long. Bracts spathulate-linear, 4–3 lin. long. Pedicels slender, 1 1/2–4 lin. (in the fruiting state up to 8 lin.) long, minutely 2-bracteolate at the base. Calyx 2 1/2–3 lin. long; segments linear. Corolla pale rose, punctate in the throat, 7–10 lin. long; lowest lobe 4–5 lin. long and broad, whitish. Capsule ovate-oblong (or subglobose according to Peyritsch), 5–7 lin. long, 3 lin. wide, densely pubescent, beak up to 2 lin. long. Seeds 1 1/4 lin. long, margins (or at least one of them) acute, sides rather broad, oblique, pitted, faces flat or one of them convex, with prominent radial lines from the margins towards the centre.
