An erect herb 1 1/2–2 ft. high, sparingly branched from the woody base; branches terete, leafy, rather densely covered with grey pubescence; internodes 4–6 lin. long. Leaves opposite or the upper subopposite, sessile, lanceolate or the upper linear-lanceolate, 3/4–1 1/4 in. long, 2–3 lin. broad, acute, glabrous or with a few minute scabrid hairs on the midrib and margins, 1-nerved. Flowers in slender imbricate spikes 3–6 in. long; bracts linear-lanceolate or boat-shaped, 2/3 in. long; 1 1/2 lin. broad, acuminate, sparingly pubescent, becoming rigid in fruit; bracteoles 1/2 in. long, similar to the bracts but much narrower. Calyx 1/2 in. long, sparingly pubescent; teeth subulate, 1 2/3–1 3/4 lin. long, the upper tooth smaller, acute, ciliate. Corolla-tube 7 1/2 lin. long, cylindric, curved, narrow, minutely pubescent inside and outside, having numerous stiff hairs at the throat inside and a few on the lobes; lobes obovate, 2 1/2 lin. long, 1 1/2 lin. broad, slightly toothed. Anthers acute. Style 3 1/2 lin. long. Capsule oblong, about 3 lin. long, shortly beaked, bisulcate.
