Perennials 15-20 cm tall. Taproot stout. Stems single, erect, robust, angular. Leaves mostly basal, in a rosette; petiole flattened, to 1.5 cm, base connate; leaf blade oblong to spatulate, 5-10 × 1-4 cm, base narrowed, apex rounded, veins 5-7. Stem leaves in whorls of 3-6, sessile, ovate-oblong to ovate, 3-5 × 1-2 cm, apex obtuse, veins 3-5. Inflorescences verticillasterlike, many flowered. Flowers 4-merous. Pedicel nodding, striate, to 2 cm. Calyx lobes ovate, 5-10 × 4-8 mm, apex acute, veins 1-3. Corolla pale yellow-green, with purple veins, campanulate, 1.6-2 cm in diam., tube 2-3 mm; lobes cuneate-obovate, 1.5-2 cm × 5-10 mm, apex rounded and erose. Nectaries 1 per corolla lobe, orbicular, naked. Filaments 7-8 mm; anthers ovoid, 0.5-1 mm. Style indistinct; stigma lobes suborbicular. Capsules narrowly ovoid, 1.2-1.6 cm. Seeds ovoid, wingless. Fl. Jun.
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