Herbs, perennial. Roots numerous, fibrous. Leaves basal; petiole 2-15(-27) cm, sparsely pubescent; leaf blade broadly ovate to broadly elliptic, 4-12 × 2.5-6.5 cm, thinly papery to papery, sparsely pubescent, veins 3-7, base broadly cuneate to subrounded and decurrent onto petiole, margin entire, repand, serrate, or dentate, apex obtuse to acute. Spikes narrowly cylindric, 3-40 cm, loosely to densely flowered, sometimes interrupted basally; peduncle 5-30 cm, white pubescent; bracts narrowly ovate-triangular to triangular-lanceolate, 2-3 mm, glabrous or pubescent at apex, keel thick. Sepals 2-4 mm, keel extending or not extending to apex, apex obtuse, rounded, or acute; lower sepals elliptic, keel broad; upper sepals broadly obovate-elliptic to broadly obovate. Corolla white, glabrous; lobes narrowly triangular, (0.7-)1-1.5 mm, patent to reflexed, apex acuminate to acute. Stamens adnate only to near base of corolla tube, exserted; anthers white, ovoid-ellipsoid, 1-1.2 mm. Pyxis fusiform-ovoid, ovoid, conic-ovoid, or narrowly conic-ovoid, 3-6(-8) mm, circumscissile near base, with 5-15 seeds. Seeds blackish brown, ovoid-ellipsoid to ellipsoid, 1.2-2 mm, angled, ventral face prominent to slightly flat; cotyledons parallel to ventral side. Fl. Apr-Aug, fr. Jun-Sep.
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A herb. It keeps growing from year to year. It has a large root. The plant is 20-60 cm tall. The leaves are near the base. Leaves are oval and 11-12 cm long by 4-9 cm wide. The leaves are entire but curled along the edges. The leaf stalk is as long as the leaf blade. The flowers are in erect spikes 20-45 cm tall. The flowers are white and do not have hairs.
Mountain slopes, ravines, riverbanks, fields, roadsides, wastelands, lawns; at elevations from near sea level to 3,800 metres. Woods and waste ground in lowland and mountains all over Japan.
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It grows in tropical and temperate places. It grows in open humid areas. It grows in wetlands. In XTBG Yunnan. In Sichuan.
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