岩蒿 yan hao

Absinthium rupestre (Linnaeus) Schrank; A. rupestre var. oelandicum Besser; A. rupestre var. thuringiacum Besser; A. viride Besser; A. viridifolium (Ledebour) Besser; Artemisia dentata Willdenow; A. rupestris var. oelandica (Besser) Candolle; A. rupestris var. thuringiaca (Besser) Candolle; A. rupestris var. viridifolia (Ledebour) Candolle; A. rupestris var. viridis (Besser) Candolle; A. viridifolia Ledebour.

Herbs, perennial, usually caespitose, 20-50 cm tall, ± woody at base, pubescent, glabrescent. Stems brown or dark brown, shortly branched or not. Leaves thinly textured. Lower stem leaves petiolate. Middle stem leaves ovate-elliptic or oblong, 1.5-3(-5) × 1-2(-2.5) cm, pinnatisect; segments 5-7 pairs, pectinate, ± clasping; lobules linear-lanceolate or linear, 1-6 × 0.5-1.5 mm. Uppermost leaves and leaflike bracts pinnatisect or 3-lobed. Synflorescence a spikelike or racemelike panicle. Capitula pedunculate or sessile, nodding. Involucre globose or subglobose, 4-7 mm in diam.; phyllaries pubescent, scarious margin lacerate; receptacle hemispheric, pubescent. Marginal female florets 8-16; corolla vasiform or narrowly conical, 3- or 4-toothed. Disk florets 30-70, bisexual. Achenes oblong or oblong-ovoid, usually with a minute apical crown. Fl. and fr. Jul-Oct. 2n = 18, 34.

Dry hills, desert or semidesert steppes, grassy marshlands, dry river valleys, riverbeds, scrub, forest margins; 1100-2900 m. Xinjiang [Afghanistan, Kazakhstan, Kyrgyzstan, Mongolia, Russia, Tajikistan; E and N Europe].

The whole plant is used in anti-inflammatory and hemostatic medicines.