Description from Flora of China
Sagina litoralis Hultén.
Herbs annual, sometimes perennial. Stems caespitose, erect or ascending, 4--8 cm tall, slender, basally branched, glabrous. Leaves linear, 4--6 × 0.7--1 mm, apex acuminate. Flower solitary, axillary. Pedicel slightly recurved after anthesis, erect in fruit, 4--25 mm, somewhat glandular hairy. Sepals 5, elliptic, 2--2.5 mm, abaxially glandular hairy. Petals 5, broadly ovate, slightly shorter than or subequaling sepals, basally clawed. Stamens 5. Styles 5. Capsule ovoid, longer than sepals, 5-valved. Seeds brown, reniform-globose, ca. 0.5 mm, not grooved, with short linear striae. Fl. Jul--Aug, fr. Aug--Sep. 2n = 22, 44.
Chinese plants belong to subsp. maxima .
Fields, rocky mountain slope meadows. Anhui, Liaoning, Sichuan, Taiwan, Xinjiang [Japan, Korea, Russia; North America].