Book  (1 May 2003)  
 
osa duplicata T. T. Yu & T. C. Ku, Acta Phytotax. Sin. 18: 501. 1980.

重齿蔷薇 chong chi qiang wei

Shrubs small, 1.5–2 m tall.
Branchlets purple-brown when young, later gray-brown, terete, curved, slender, glabrous; prickles sparse, yellowish.
Leaves including petiole 2–2.5 cm; free parts lanceolate, glabrous or sparsely glandular-pubescent, margin entire, apex acuminate; rachis and petiole shortly prickly, glandular-pubescent; leaflets 3–5, obovate or elliptic, 8–15 × 5–8 mm, glabrous, abaxially glandular, base subrounded or broadly cuneate, margin doubly serrate, apex rounded-obtuse or truncate.
Flowers solitary or 2 or 3 and fasciculate, ca. 1 cm in diam.; pedicel 5–10 mm, glandular-pubescent; bracts unknown. Hypanthium subglobose, abaxially sparsely pubescent and glandular-pubescent.
Sepals 5, deciduous, ovate-lanceolate, abaxially sparsely pubescent and glandular-pubescent, adaxially densely puberulous, margin entire, apex shortly caudate. Petals 5, yellowish or white, obovate, base broadly cuneate, apex rounded-obtuse.
Styles connate into column, exserted, slightly longer than stamens, sparsely pubescent or subglabrous.
Hip purple-red, subglobose, ca. 5 mm in diam., sparsely glandular; sepals very late deciduous.
Fl. May–Jul, fr. Aug–Sep.

Farmland, roadsides; 2400--2600 m. Xizang.