Herbs perennial. Stems erect, numerous, 40-60 cm tall, branched at apex, densely retrorse gray tomentose. Stem leaves opposite; petiole 1-2 mm; leaf blade narrowly lanceolate to obovate-lanceolate, 3-9 × 0.5-1.5(-2.5) cm, papery, adaxially green, densely pilose or papillose glandular hairy, abaxially rusty, gray, or white tomentulose or densely papillose hairy or glandular, base narrowly attenuate, margin crenulate-serrulate except base, apex acute; lateral veins ca. 4-paired, immersed adaxially, elevated abaxially. Panicles terminal, loose, 10-30 cm; cymes 3-7-flowered, pedunculate, densely gray tomentose; floral leaves subsessile, lanceolate, less than 1 cm; bracteoles minute, linear, less than 1 mm. Pedicel 1-4 mm. Calyx campanulate, ca. 2 mm, densely gray tomentose outside, obscurely 2-lipped, teeth ovate-triangular, subequal, shorter than calyx tube; fruiting calyx tubular-campanulate, to 4 mm, curved, 10-veined, lower 2 teeth longer. Corolla white, purplish, or rose, 6-7 mm, white pilose outside, glandular, tube slightly exserted. Stamens exserted. Style exserted. Nutlets brownish yellow, triquetrous, ovoid, ca. 1 mm, glabrous. Fl. Sep-Oct, fr. Oct-Nov.
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