Herbs perennial, 50--100 cm tall, pilose with sparse multicellular eglandular hairs. Roots caespitose, pale yellow, narrowly cylindric, slightly fleshy. Stem solitary, simple or branched above. Leaves elliptic-lanceolate, (4--)8--12 × 2--3 cm, both surfaces pubescent, ciliate at margin, base cuneate, apex acuminate. Dichasium many flowered. Pedicel 2--5(--15) mm; bracts lanceolate, pubescent. Flowers 3.5--5 cm in diam. Calyx tubular to narrowly funnel-shaped, (2--)2.5--3 cm × 2.5--3.5 mm, slightly inflated in fruit, pilose at veins; teeth triangular, 2--4 mm. Petal limb deep red, triangular-obovate, irregularly parted into numerous incised-dentate lobes; claw often exceeding calyx, narrowly cuneate, glabrous. Stamens and styles included; anthers dark purple. Androgynophore 1--1.5 cm. Capsule ellipsoid-ovoid, 1--1.5 cm, protruding from calyx tube. Seeds red-brown, reniform, ca. 1 mm, tuberculate. Fl. Jul--Aug, fr. Aug--Sep. 2n = 24*.
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A herb. It keeps growing from year to year. It grows up to 1 m tall. The leaves are narrowly sword shaped and 8-12 cm long by 2-3 cm wide.
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