Thymus debilis Bunge, Fl. Altaic. 2: 391. 1830; Antonina debilis (Bunge) Vvedensky; Calamintha annua Schrenk; Melissa debilis (Bunge) Bentham; Satureja annua (Schrenk) B. Fedtschenko; S. debilis (Bunge) Briquet.

Herbs perennial. Stems slender, ascending, 9-20 cm, base or nodes reddish, pubescent. Petiole 2-8 mm, shorter toward stem apex; leaf blade ovate to oblong-ovate, 1-2 × 0.4-1 cm, herbaceous, base attenuate, margin remotely denticulate, base entire, sparsely minutely hispid, apex acute, adaxially sparsely minutely hispid, abaxially pubescent, sparsely yellow glandular, veins minutely hispid. Cymes dichotomous, 2-12-flowered, axillary; peduncle 2-3 mm; bracts acute, 0.5-1.5 mm. Pedicel slender, 1-5 mm. Calyx tubular-campanulate, pendulous, ca. 6 × 1.5 mm in flower, slightly dilated in fruit, conspicuously 13-veined, puberulent, yellow glandular, veins minutely hispid, throat sparsely hirsute, tube longer than limb, slightly saccate toward base, teeth of upper lip ovate, apex awned, reflexed, ca. 2 mm, teeth of lower lip apex subulate-aristate, slightly longer than upper lip. Corolla white, to as long as calyx, funnelform, gradually dilated; stamens included, posterior 2 infertile; anther cells divergent. Style apex complanate. Disc ringlike. Nutlets ca. 1.2 × 0.8 mm, brownish, smooth. Fl. Jun-Jul, fr. Jul-Aug.

Subalpine meadows, gravelly slopes, stony beaches, rocky cliffs, stony hillocks; 500-2000 m. Xinjiang [Kazakhstan, Kyrgyzstan, Russia, Tajikistan].