Description from Flora of China
Floscopa scandens var. vaginivillosa R. H. Miau.
Stems 20--70 cm, simple, prostrate proximally. Plants glandular pubescent throughout with multicellular hairs, or hairy only on leaf sheaths and inflorescences, sometimes sheaths hairy only on 1 side. Leaves usually sessile or with short, winged petiole; leaf blade elliptic to lanceolate, 4--12 × 1--3 cm, adaxially with scaly processes. Inflorescences several, terminal and axillary, each a broomlike panicle to 8 × 4 cm, densely glandular with long hairs; peduncle nearly absent; pedicels very short. Sepals shallowly boat-shaped. Petals blue or purple. Fertile stamens 6; filaments glabrous. Capsule ovoid, compressed, ca. 2 × 2 mm. Seeds gray-blue, semiellipsoid, ca. 1.5 mm, shallowly radiate striate. Fl. and fr. Jul--Nov.
Used medicinally as a febrifuge and for relieving pyodermas, abscesses, and acute nephritis.
Grassy ravines, forests, by water; near sea level to 1700 m. Fujian, Guangdong, Guangxi, Hainan, WC Hunan (Xuefeng Shan), Jiangxi, SC Sichuan (Yongchuan Xian), SE Xizang (Mêdog Xian), S and W Yunnan, SW Zhejiang (Longquan Xian) [Bhutan, India, Laos, Myanmar, Sikkim, Thailand, Vietnam; Oceania].