Subshrubs 0.5-2 m tall, much branched, weakly to strongly anisophyllous. Stems 4-angled, sometimes zigzag, glabrous or sparsely hirsute. Leaves sessile; leaf blade narrowly to broadly oblong-elliptic or oblong-oblanceolate, rarely ovate for small leaves, 2-20 × 1.5-6 cm, both surfaces sparsely pilose, abaxially pale green or reddish when young, adaxially green, secondary veins 12-15 on each side of midvein, base attenuate, cuneate, rounded, or auriculate, margin serrate to undulate, apex acuminate. Inflorescences axillary or terminal, spikes, 3-10 cm, sometimes branched; peduncle 2-4 cm, 4-angled, sulcate, bracteate; sterile bracts ovate, 0.8-2 × ca. 1.5 cm; floral bracts imbricate, broadly ovate to obovate-spatulate, 4-9 mm, often becoming recurved, persistent, densely villous and ciliate, apex usually apiculate but sometimes rounded or emarginate; bracteoles absent. Calyx 6-12 mm, gland-tipped pilose, 5-lobed almost to base; lobes linear, unequal with 2 slightly shorter than others, margin usually ciliate, apex subacute. Corolla pale purple to violet, funnel-shaped, 2.5-3 cm, curved, outside gland-tipped pilose on lobes, inside glabrous; tube basally cylindric and narrow for ca. 4 mm then weakly to strongly bent, abruptly inflated, and widened to ca. 2.5 cm at mouth; limb weakly 2-lipped, lower lip 3-lobed, upper lip 2-lobed; lobes ca. 3 mm. Stamens 4, included; filaments glabrous, shorter pair ca. 2 mm, longer pair ca. 4 mm; anther thecae oblong, ca. 1.5 × 1 mm; pollen type 3. Ovary glabrous; style ca. 3.2 cm. Capsule narrowly oblong-obovoid, 8-10 × ca. 2 mm, glabrous, 4-seeded, apex apiculate. Seeds ovate-suborbicular in outline, ca. 2 × 1.8 mm, pubescent; areola very small. Fl. Sep-Jan, fr. Jan-Feb.
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