Herbs perennial, yellow-green, to 70 cm tall. Stems erect, distally many branched, proximally glandular pubescent. Leaves obovate-or ovate-oblong, 3--7 × 1--3 cm, glandular pubescent, 3--5-veined, base amplexicaul and slightly connate. Thyrse diffuse; bracts triangular, glabrous, apex acuminate. Pedicel slender, 4--15 mm, glabrous. Calyx green veined, broadly campanulate, 2--4 mm, lobed for ca. 1/2 its length; lobes ovate, margin membranous, apex obtuse. Petals red, pink, or white, oblong, ca. 5 × 2 mm, apex retuse or obtuse. Stamens slightly shorter than petals. Ovary ovoid. Styles exserted. Capsule globose, longer than calyx. Seeds reniform, ca. 1 mm, minutely flat tuberculate. Fl. Jul--Aug, fr. Aug--Sep.
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Another European sp., is also occasionally intr. in our range. It is much like G. scorzonerifolia, but the cal and pedicels are glabrous, and the lvs are sometimes wider, to 3.5 cm.
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