Description from Flora of China
Calamintha barosma W. Smith, Notes Roy. Bot. Gard. Edinburgh 9: 88. 1916; Satureja barosma (W. Smith) Kudo.
Subshrubs diffuse, tufted, aromatic. Stems numerous, radiately prostrate, slender, 20-40 cm, terete, base woody, persistent, purple-red, densely puberulent, white pilose, much-branched, upper branches longer. Petiole ca. 0.5 mm; leaf blade lanceolate to oblanceolate, 4-6 × 2-3 mm, subpapery, glabrous or finely pilose, conspicuously impressed glandular, base cuneate, decurrent, margin entire, involute, apex slightly obtuse. Verticillasters 1- or 2-flowered, 3-7 close together in terminal spikes; bracts similar to leaves, smaller, narrower; bracteoles linear, ca. 2 mm. Pedicel ca. 2 mm. Calyx ca. 9 mm, ± purplish, conspicuously 13-veined, veins and teeth puberulent, golden glandular between veins, throat pilose annulate; teeth subulate, apiculate, subequal, ca. 2.5 mm. Corolla rose to red-purple, ca. 1.8 cm, densely puberulent; tube slender, ca. 1.2 cm; upper lip oblong, ca. 6 × 3 mm; lower lip spreading, ca. 7 mm; middle lobe elongated, oblong; lateral lobes ovate. Ovary glabrous. Nutlets triquetrous, oblong, ca. 1.3 mm, black-brown with 2 white scars at base, glabrous. Fl. Jul-Aug, fr. Sep-Oct.
Species 3-5 are closely related.
* Dry gravelly grasslands, rocky crevices of limestone mountains; 2300-3800 m. Yunnan