Subshrubs to 2 m tall, usually pubescent, strongly anisophyllous. Leaf blade ovate-elliptic, 2-20 × 1-9.5 cm, usually pubescent at least on veins, base attenuate and oblique, margin serrate, apex shortly acuminate and sometimes falcate. Inflorescences axillary, usually capitate, borne on 3-furcate axillary gland-tipped pilose peduncles, sometimes with scattered flower pairs below heads, rarely of branched spikes with flower pairs only; bracts ovate-suborbicular, 3-6 mm, concave, caducous, gland-tipped pilose, apex acute; bracteoles absent. Calyx 6-10 mm at anthesis, gland-tipped pubescent; lobes linear, accrescent to ca. 1.6 cm with one lobe 2-3 mm longer than others, apex acute. Corolla blue, 3.5-4.8 cm, outside glabrous, inside glabrous except for trichomes retaining style; tube basally cylindric and narrow then widened to ca. 1.5 cm at mouth. Stamens 4; shorter filament pair ca. 1 mm, recurved; longer filament pair 5-6 mm, slightly unequal, glabrous; anther thecae subspherical, ca. 1 mm, incurved; pollen type 3. Ovary gland-tipped; style ca. 2.5 cm, glabrous except for a few trichomes basally. Capsule oblong, 13-18 × ca. 3 mm, apically gland-tipped pilose, 4-seeded. Seeds ovate in outline, ca. 3 × 2 mm, appressed pubescent. Fl. Sep-Apr.
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