Description from Flora of China
Phlomis melanantha Diels var. angustifolia C. Y. Wu.
Roots woody, thick. Stems 60-90 cm tall, subglabrous. Petiole 1.2-6 cm; stem leaf blades broadly ovate to ovate-oblong, 4.5-12 × (1.9-)2.5-9.5 cm, reduced upward, adaxially strigose, abaxially with scattered elevated glands, base cordate, margin serrate-dentate to dentate, sometimes crenate, apex acute to long acuminate. Verticillasters numerous, many flowered; floral leaves similar to stem leaves; bracts rigid, subulate, 1-1.2 cm, spinescent, sparsely ciliolate. Calyx purple, ca. 12 × 6 mm, dusty puberulent, sometimes veins very sparsely bristly outside; teeth double toothed at margin, puberulent, apex emarginate, tufted hairy inside, spines 2-3 mm. Corolla purple-red, limb dark purple or reddish, ca. 2.2 cm, silky pilose outside; tube ca. 1.4 cm, glabrous outside, pilose on posterior, pilose annulate inside; upper lip ca. 8 mm, margin irregularly dentate, bearded inside; lower lip ca. 6 × 9 mm, middle lobe oblate, ca. 4 × 6 mm; lateral lobes ovate. Posterior filaments each with a slender reflexed basal appendage. Nutlets glabrous. Fl. Jun-Sep, fr. Jul-Oct.
* Picea forests, mixed forests, grasslands; 3000-3300 m. Sichuan, Yunnan.