荒野蒿 huang ye hao

Oligosporus campestris (Linnaeus) Cassini.

Shrubs, 30-60[-150] cm tall, with a strong woody stock, much branched, faintly aromatic, pubescent or glabrescent. Lowermost leaves: petiole 3-5 cm; leaf blade broadly ovate or ovate, (3-)4-5(-8) × 2.5-5 cm, 2(or 3)-pinnatisect; segments 4 or 5 pairs, 3-5-sect; lobules narrowly linear or narrowly linear-lanceolate, 4-10 × (0.5-)1-1.5[-2] mm, apex mucronulate. Middle stem leaves sessile, 1- or 2-pinnatisect; segments 3 or 4 pairs. Uppermost leaves and leaflike bracts 3-5-sect or entire. Synflorescence a lax, broad panicle. Involucre ovoid, 1.5-2.5 mm in diam. Marginal female florets 3-6[-20]. Disk florets 6-10[-30], bisexual. Achene obovoid. Fl. and fr. Jul-Oct. 2n = 18, 36.

Steppes, waste areas, rocky slopes, dune margins; 300-3100 m. N Gansu, Taiwan, Xinjiang [Japan, Russia; C Asia, Europe, North America].

We have not seen material of Artemisia campestris var. glomerata Pampanini (Nuovo Giorn. Bot. Ital., n.s., 34: 642. 1927), described as an annual with ± filiform leaf segments.