Perennial herb to 50 cm; stems reddish-brown, erect, branched; branches leafy, glabrous to minutely pubescent with ± retrorse hairs. Leaves often fascicled with smaller leaves in the axils, linear, 10–30 mm long, 1–1.5 mm wide, apex acute, margins entire, glabrous, single-veined. Inflorescence spicate, 3–7 cm long; bracts ovate, 3–4 mm long, acuminate to apiculate, margins hyaline, glabrous. Calyx ovate, 3–4 mm long, obtuse or emaginate, hyaline, glabrous. Corolla white with an orange to reddish brown throat, 8–12 mm long; tube 2.5–4 mm, slit to about 2/3 its length; limb to 8 mm, glabrous; lobes 1–1.5 mm, oblong. Anthers ± 1 mm; filaments short. Ovary ovoid, ± 4 mm long, glabrous; style shorter than the tube, bent apically at ± right angles and exserting through the slit in the tube; stigma elongate. Capsule oblong, 3–5 mm long, glabrous, separating into 2 cocci at maturity. Fig. 52, p. 199.
