Herbs 40-100 cm tall, perennial. Rhizome stout, with many fibrous roots. Stem solitary, erect, apically branched, unwinged. Basal and lower stem leaves petiolate; petiole 5-13(-20) cm; leaf blade oblong to obovate in outline, (10-)20-50(-70) × (3-)7-10(-15) cm, thick, pinnately divided or pinnately lobed, both surfaces green, scabrid, and hispid; lateral lobes 4-8 pairs, narrowly obovate-elliptic to oblong, margin serrate, dentate, or entire, apex acuminate; terminal lobe narrowly ovate to elliptic. Middle stem leaves gradually smaller upward on stem. Upper stem leaves sessile, narrowly elliptic to linear, undivided. Capitula numerous, in a corymbiform-paniculiform synflorescence. Involucre cylindric to narrowly campanulate, 6-7 mm in diam. Phyllaries in 4 or 5 rows, sparsely arachnoid; outer phyllaries ovate, 3-4 × ca. 2 mm, apex acuminate; middle phyllaries oblong, 4-9 × 1.5-2 mm, apex subobtuse and mucronate; inner phyllaries narrowly elliptic, 9-11 × 1-1.5 mm, apex obtuse. Receptacle bristles to 7 mm. Corolla purple, 1.1-1.5 cm, tube 6-9 mm, limb 5-6 mm, lobes 3-3.5 mm. Achene yellowish brown to black, obconic, 5-7 mm, obtusely ribbed, glabrous. Pappus white; outer bristles 2-5 mm; inner bristles ca. 1 cm. Fl. and fr. Aug-Oct. 2n = 26.
More
A herb. It grows 40-100 cm tall. It keeps growing from year to year. It has a stout rhizome. It has a single erect stem. The lower leaves have stalks 5-13 cm long. The leaves are oblong and 20-50 cm long by 7-10 cm wide. They are divided into 4-8 pairs of lobes along the stalk. There are teeth along the edge.
Home