Convolvulus ammannii Desr.

Herbs perennial, with a short woody rootstock. Stems few to several, prostrate or ascending, 2-10(-15) cm; branches ± densely silvery sericeous. Leaves sessile, linear or linear-oblanceolate, 1-2 cm X 1-4 mm, ± densely silvery sericeous, base attenuate, apex acute. Pedicel 0.5-7 cm. Flowers solitary, subterminal. Sepals slightly unequal, 3.5-7 mm, ± sericeous abaxially; outer 2 oblong or oblong-elliptic, apex acute or acuminate; inner ones wider, elliptic, apex acuminate. Corolla pale rose or whitish with pink-purple lines, funnelform, 0.8-1.5 cm; limb shallowly 5-lobed, midpetaline bands pubescent. Stamens included, unequal; filaments glabrous. Disc ringlike. Ovary ovoid, pilose apically. Stigmas linear. Capsule ovoid-ellipsoid, 6-8 mm, apiculate, apiculum pilose. Seeds 2 or 3, reddish, ovoid, smooth, beaked. Fl. Jun-Aug, fr. Jul-Aug.

Gansu, Hebei, Heilongjiang, Henan, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shanxi, W Sichuan, Xinjiang, E Xizang [Kazakhstan, Korea, ?Kyrgyzstan, Mongolia, Russia].

Loess soils, ravines, clay banks, on dry grassy slopes, roadsides; 1200-3400 m.