无齿蒌蒿 wu chi lou hao

Artemisia keiskeana f. hirtella Nakai; A. keiskeana subf. rotundifolia Pampanini; A. vulgaris Linnaeus lusus glabrescens Regel.

Subshrubs, 30-100(-120) cm tall, strongly rhizomatous, most parts sparsely puberulent or glabrescent. Lower stem leaves: petiole 3-8 mm; leaf blade obovate or broadly cuneate, 3-8 × 1.5-4.5 cm, base attenuate, margin few acutely serrate from middle to apex, apex rounded. Middle stem leaves ± sessile; leaf blade obovate, ovate-elliptic, or obovate-cuneate, 4.5-6.5(-8) × 1.5-4 cm, base attenuate, margin serrate upward, apex obtuse. Upper leaves and leaflike bracts ovate or elliptic, few serrate or entire. Synflorescence a lax conical panicle; branches obliquely ascending, longer than subtending leaves. Capitula long pedunculate, pendent. Involucre subglobose, 3-3.5 mm in diam.; phyllaries glabrous. Marginal female florets 6-10; corolla 1.2-1.5 mm. Disk florets 13-18, bisexual; corolla ca. 2 mm. Achenes ovoid-ellipsoid, ca. 2 mm. Fl. and fr. Aug-Nov. 2n = 18, 27.

Roadsides, dry slopes, shrublands, grasslands, forest margins; 100-900 m. Hebei, Heilongjiang, Jilin, Liaoning, Shandong [Japan, Korea, E Russia].