形态特征：Herbs, shrub-like, or subshrubs, 50–150 cm tall. Stems erect, branching, slender, glabrous. Leaves short-petiolate; petiole 1–1.5 cm long, glabrous, exauriculate; blade narrowly elliptic or oblong-elliptic, 5–22 cm long, 2–5 cm broad, base narrowly cuneate, margin prominently mucronate-serrate, apex acute-acuminate, papery, both surfaces glabrous, pinnately veined, lateral veins 12–18, arcuate-ascending, somewhat prominent abaxially; uppermost and branch leaves obviously smaller. Capitula radiate, numerous in lax axillary and terminal rounded compound corymbs; peduncles 2–3 mm long, densely pubescent, bracts and/or bracteoles 1 or 2. Involucres cylindrical, 5–5.5 mm long, 1.5–2 mm broad, calyculate; bracts of calyculus 2 or 3, ca. 1 mm long; phyllaries 5, oblong-linear, 5–5.5 mm long, 1–1.5 mm broad, margin scarious and subglabrous, apex obtuse and pubescent, often purplish. Ray florets 2 or 3; corolla ca. 8 mm long; tube ca. 4 mm long; lamina yellow, oblong, 3.5–4.5 mm long, ca. 1 mm broad, 3-denticulate, 2- or 3-veined. Disk florets 2 or 3; corolla yellow, 6–7 mm long, tube 3 mm long, infundibuliform limb exserted, narrow; lobes ovate-oblong, ca. 2 mm long, apex acute. Anthers ca. 3 mm long; anther tails 1/4 –1 3/4 as long as anther collar; appendages ovate; anther collars distinctly dilated at base. Style arms 1–1.2 mm long, fringed with short papillae, central tuft prominent, much longer than laterals. Achenes cylindrical, ca. 1.5 mm long, sparsely pubescent. Pappus white, ca. 5 mm long.
