Herbs perennial, glabrous. Rootstock sometimes very stout; nodes with adventitious roots. Flowering stems simple or many branched, erect or ascending, 6-18 cm. Leaves 3-or 4-verticillate; leaf blade obovate to suboblong, 1-2 cm, base obtuse and shortly spurred. Cyme corymbiform; bracts subobovate. Flowers unequally 5-merous. Sepals broadly linear to obovate-linear, unequal, 3-5 mm, base spurless, apex obtuse and long papillate. Petals ± free, yellow, narrowly lanceolate, 7-10 mm, apex subobtuse, helmet-shaped, mucronate, and papillate. Stamens 10; antepetalous ones 3.5-4.5 mm, inserted 2-3 mm from petal base. Nectar scales broadly spatulate, ca. 1 mm, apex retuse. Carpels erect, base connate for 1-1.5 mm. Styles 1.5-1.7 mm. Follicles ovoid to subovoid-globose, many seeded; placenta linear. Seeds broadly obovoid, ca. 0.8 mm, densely and minutely papilliferous. Fl. Sep-Oct, fr. Nov.
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