Herbs or subshrubs 20-30(-100) cm tall, much branched, anisophyllous. Stems slender, erect, 4-angled, basally glabrescent, apically reddish brown setose. Petiole 1.5-2.5 cm, densely reddish setose; leaf blade ovate to ovate-lanceolate, 8-9 × 3.5-4 cm, both surfaces reddish brown setose on veins, abaxially whitish, adaxially dark green, cystoliths absent or obscure, secondary veins ca. 5 on each side of midvein, base broadly cuneate to subrounded, margin crenate, apex acuminate. Inflorescences axillary, spikes, 2-4 cm; rachis densely reddish setose; bracts spatulate, 1.3-1.6 × ca. 0.3 cm, persistent, basal claw pale reddish setose, expanded apex green and leaflike; bracteoles linear-spatulate, 0.8-1.2 cm, reddish setose. Calyx ca. 1.3 cm, 5-lobed almost to base; lobes linear-spatulate, reddish setose. Corolla pale blue, 4-5 cm, straight, outside puberulent, inside glabrous except for trichomes retaining style; tube basally cylindric and ca. 2 mm wide for ca. 8 mm then gradually widened to ca. 1.2 cm at mouth; lobes orbicular, 6-7 mm in diam. Stamens 4, included; filaments white villous, shorter pair ca. 4 mm, longer pair ca. 6 mm; anther thecae oblong, ca. 2 × 1 mm; pollen type 3. Capsule light brown, fusiform, ca. 1 cm, gland-tipped pubescent, 4-seeded, apex apiculate. Seeds brown, ovate in outline, ca. 2 × 2 mm, compressed, pubescent, apex shortly apiculate; areola absent. Fl. Aug-Dec, fr. Nov-Feb.
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