戟叶艾纳香 ji ye ai na xiang

Herbs. Stems 60-150 cm tall, usually not branched, terete, densely pale brown pilose. Leaves sessile or very shortly petiolate up to 5 mm, oblong-lanceolate or lanceolate, rarely elliptic, 6-20 × 2.5-7 cm, abaxially densely pilose, adaxially scabrid with prominent hairs, base sagittate with 2 distinct acute auricles, margin distantly and minutely dentate, apex acute or shortly acuminate. Capitula in a large, terminal, bracteate panicle. Involucre campanulate, ca. 10 mm; phyllaries in 5 series, outer ones lanceolate, ca. 1.5 mm, abaxially pubescent and glandular, median linear, 3-5 mm, pubescent and glandular adaxially, inner linear, ca. 7 mm, dry membranous, glabrous. Receptacle 2-3 mm in diam., alveolate, fimbrillate. Corollas yellow, tubular; marginal florets filiform, ca. 5 mm, subequally 5-lobed; central florets 5-6 mm, with 5 ovate, acute lobes. Anther tails longer than thickened portion of filament. Achenes spindly, ca. 1.2 mm, pubescent, 10-ribbed. Pappus light yellow or whitish yellow, ca. 8 mm. Fl. Aug-Dec.

Mixed forests, moist grassy slopes, thickets; 500-1000 m. Guangxi, Guizhou, Yunnan [Laos, Vietnam].