Calamintha laxiflora Hayata, J. Coll. Sci. Imp. Univ. Tokyo 30: 228. 1911; Satureja laxiflora (Hayata) Matsumura & Kudo.

Rhizomes ± woody, slender. Stems numerous, ascending, ca. 20 cm, slender, twisted, densely retrorse white pubescent. Petiole 1-2 mm; leaf blade ovate, 7-12 × 5-8 mm, papery, subglabrous, abaxially sometimes red-purple, base rounded, margin shallowly serrate, apex obtuse to acute. Verticillasters 2-6-flowered, semiglobose, 1.2-1.5 cm in diam.; peduncle ca. 1 mm; floral leaves entire, apex bractlike; bracts needlelike, ca. 3 mm, ribbed, purple-red, white ciliate. Pedicel ca. 2 mm. Calyx tubular, ca. 6 mm, tinged purple-red, glandular pubescent, veins and teeth minutely hispid; upper teeth 3, subtriangular, short awned; lower teeth 2, subulate, awned. Corolla tube ca. 1.1 cm, slightly curved outward, to 3 mm wide at throat; upper lip ca. 2.5 mm, 2-lobed; lower lip spreading, ca. 5 mm; middle lobe broadly circular, ca. 3 mm. Nutlets ovoid, ca. 0.7 × 0.6 mm.

* Hillsides. Taiwan.