Description from Flora of China
Veronica rotunda Nakai, Bot. Mag. (Tokyo) 29: 3. 1915.
Stems 1, erect, ca. 1 m tall, simple or apically branched, glabrous or puberulent, with a ring at each node connecting petiole bases. Leaves opposite, sessile, amplexicaul, sometimes short petiolate upward; leaf blade glabrous or abaxially pubescent along veins, base cuneate, margin deltoid dentate, apex acute to short acuminate. Inflorescences mostly 1, axis densely with white short curly hairs. Pedicel 2-5 mm, densely with multicellular glandular hairs, rarely villous. Corolla blue, blue-purple, or rarely white, 6-7 mm; tube less than 1/3 of corolla length; lobes patent, upper lobe ovate-orbicular, other 3 lobes narrowly ovate. Stamens exserted. Capsule 3-5 mm. Fl. Jun-Aug. 2n = 34.
Meadows, among grasses at forest margins, forests, grassy mountain slopes; below 1600 m. Anhui (Yuexi Xian), Heilongjiang, Henan (Shangcheng Xian), Jilin, Liaoning, Shanxi, Zhejiang (Lin'an Xian) [Japan, Korea, Russia (Far East)].