Annuals 2-3.5 cm tall. Stems erect, much branched from base, with short branches, glabrous. Leaf blade spatulate to obovate, hirsute and glabrescent, margin long ciliate, apex rounded, veins 1-3. Basal leaves withered at anthesis; petiole 0.5-1 mm; leaf blade 0.9-1.2 cm × 4.5-8 mm. Stem leaves crowded; petiole 0.5-0.7 mm, entirely connate, hirsute; leaf blade 4-6 × 1.7-3.5 mm, as long as or longer than internodes. Flowers few to many. Pedicel 2-4 mm, surrounded by upper leaves, glabrous. Calyx tubular to narrowly obconic, 7.5-11 mm, outside hirsute and glabrescent; lobes ovate-lanceolate, 2-2.5 mm, margin long ciliate, apex acuminate and caudate, midvein distinct. Corolla greenish yellow or inside sometimes pale blue, tubular, ca. 1.4 cm, glabrous; lobes ovate-lan-ceolate, 1.5-2.5 mm, margin entire, apex acute and caudate; plicae broadly ovate, 1.2-1.5 mm, margin entire or erose, apex rounded. Stamens inserted at middle of corolla tube, unequal; filaments 2.5-6 mm; anthers ellipsoid, 0.8-1 mm. Style 1.5-2 mm; stigma lobes narrowly oblong. Capsules obovoid, 8-9 mm; gynophore to 1.3 cm. Seeds light brown, ellipsoid, 1.2-1.5 mm. Fl. and fr. May.
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