Herbs, annual. Stems erect, 5-30 cm tall, branching from base or in upper part; branches erect or divaricate-spreading, slender, sparsely pubescent or subglabrous. Leaves sessile; blade ovate-oblong, 1.5-5 × 0.4-1.5 cm, both surfaces sparsely pubescent to subglabrous, base slightly dilated and subamplexicaul, pinnatifid to finely and deeply pinnatisect with 4-8 usually narrow, linear, irregularly denticulate or entire lateral lobes, apex obtuse to subacute. Upper leaves smaller, pinnately lobed to linear and subentire. Capitula radiate, few to many, terminal, laxly corymbose; peduncles 1-3(-5) cm, slender, rather densely to sparsely white pubescent; bracteoles 2-4, linear-subulate. Involucres narrowly campanulate, 5-7 × 1.5-4 mm, calyculate; bracts of calyculus 4 or 5, subulate, inconspicuous; phyllaries 13-15, linear or linear-lanceolate, 0.3-0.5 mm wide, herbaceous, with narrow membranous margins, glabrous, apex acute-acuminate, sometimes dark tipped. Ray florets 4-7; corolla tube 3-3.5 mm; lamina yellow, oblong, very short, 2-2.5 mm, hardly exceeding involucre, 4-veined, apically 3-denticulate, becoming revolute. Disk florets many; corolla yellow, ca. 5.5 mm, with ca. 3 mm tube and narrowly funnelform limb; lobes ovate-oblong, ca. 0.5 mm, apically subobtuse. Anthers ca. 2 mm, basally obtuse-auriculate, appendages ovate; antheropodia distinctly dilated toward base. Style branches ca. 0.5 mm. Achenes cylindric, 2.5-3 mm, sparsely adpressed pubescent. Pappus white, ca. 5.5 mm. Fl. Jun-Sep. 2n = 18, 20.
Home