Erect shrubby plant up to 1 m high. Stems subterete, 3-5 mm ø, striate, pubescent. Leaves chartaceous, lanceolate or slightly elliptic, 11-17 by 3-6.5 cm; apex acuminate, rarely acute; base cordate, sinus 0.5-1 cm deep, auricles often overlapping or surrounding the stem; shortly hairy on both surfaces, especially on midrib, nerves and veins; basal nerves often 2 pairs, inner pair ascending to halfway the blade, outer pair very short and weak; lateral nerves 2 or 3 (-6) pairs; nerves slightly raised or nearly flat on both surfaces; veins often reticulate, some crossbarlike, flat, distinct, rarely faint on both surfaces; petiole c. 3 mm, pubescent. Inflorescences in axils of foliage leaves, spiciform; rachis with condensed internodes up to 1.5 cm long, pubescent; bracts lanceolate, 3-6 mm long, pubescent on both surfaces. Pedicel and ovary c. 5 mm, pubescent. Perianth yellowish, erect, with rather faint reticulation, pubescent outside; utricle subglobose, c. 4 mm ø, basal part contracted and stipe-like (0.7 mm long); tube cylindric, 10-16 by 2-2.5 mm; limb lanceolate, c. 20 by 3 mm, acuminate, pubescent on the inner surface. Stamens 6; anthers 1 mm long. Style column short, very obscurely lobed. Capsules oblong-ellipsoid, c. 1.5 by 1 cm, sparsely short-hairy. Seeds deltoid, c. 3 mm long and wide, not winged, verrucose on both surfaces.
In littoral thicket, up to 350 m. Fl. Aug., Nov.; fr. Aug., Oct., Nov.
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