Description from Flora of China
Herbs smooth. Sterile shoots rosulate; rosette leaves alternate, pseudopetiolate. Flowering stems basally creeping or decumbent and rooting at nodes, apically suberect, 6-18 cm, apex sometimes 2-cleft. Stem leaves subopposite, crowded near stem apex; leaf blade narrowly spatulate, 1-2.5 × 0.4-0.6 cm, base tapered, apex obtuse to subobtuse. Cyme cymose. Flowers sessile, (4 or)5-merous. Sepals spatulate to linear-oblanceolate, unequal, 2.8-4 × 1-2 mm, base attenuate to truncate, apex obtuse. Petals linear-lanceolate, equal, 1-veined. Stamens 8-10; antepetalous ones inserted slightly above petal base; filaments ca. 3 mm; anthers oblong. Nectar scales 4 or 5, long, apex emarginate. Carpels 4 or 5, base connate. Styles ca. 1 mm. Follicles stellately divergent, ca. 7 mm in diam., many seeded. Seeds brown, oblong, ca. 0.6 mm, minutely mammillate. Fl. Jun, fr. Nov.
* Mountainous areas. N Taiwan (Taibei, Yilan Xian).