Herbs, perennial, rhizomatous. Stem solitary, ascending then erect, 30-60 cm tall, puberulent when young, soon glabrous. Basal and lower stem leaves withered by anthesis, long petiolate; petiole 4-8 cm, not winged, basally expanded but not auriculate; blade ovate-triangular, 4-6 × 2.5-5 cm, papery, base cordate or hastate, margin coarsely sharply dentate, apex acute. Median stem leaves larger; petiole 3-5 cm, broadly winged, basally expanded into prominent subamplexicaul dentate auricle; blade ovate-triangular, 6-10 × 4-6 cm, otherwise similar, glabrous, pinnately veined, lateral veins 10-14. Upper leaves sessile; blade ovate-lanceolate or oblong-lanceolate, 4-9 × 1.5-3 cm, with auricle and petiolar wings confluent with blade, margin irregularly deeply dentate, apex long acuminate. Capitula at first erect, then nodding, discoid, numerous, arranged in terminal and upper axillary rather dense rounded corymbiform clusters; peduncles 5-12 mm, densely fulvous puberulent; bracteoles 1-3, linear. Involucres obconic-campanulate, 6-7 × 2.5-4 mm, calyculate; bracts of calyculus 4 or 5, linear, unequal, 3-6 mm, apically acute, dark; phyllaries 8-13, spreading or reflexed in upper part, linear-lanceolate, 6-7 × 1-1.5 mm, leathery, puberulent to glabrous, apically acute-acuminate, dark at apex and on upper margin. Disk florets (13-)22-26; corolla yellow, ca. 7.5 mm, with ca. 4 mm tube and funnelform limb; lobes ovate-triangular, apically acute. Anthers ca. 2 mm, basally shortly obtuse-auriculate, appendages ovate-oblong; antheropodia elongated, basally gradually slightly dilated. Style branches ca. 1 mm. Achenes cylindric, ca. 2.5 mm, glabrous. Pappus white, ca. 5 mm. Fl. Jul-Sep.
Home