Rubus nguyenii Huan C.Wang, 2014

Wang, Huan-Chong, 2014, Two replacement names in Asian Rubus (Rosaceae), Phytotaxa 172 (3), pp. 293-296 : 295

Rubus nguyenii Huan C.Wang , nom. nov. ( Figure 1 )

Replaced name: Rubus caudatisepalus T. H. Nguyên & Yakovlev (1982: 108) , nom. illeg., non Calderón (1973: 57). Type : — VIETNAM.? Hoang Lien Son:? Sa pa, collection date unknown, sine coll. 75 (holotype HN, not seen, probably lost.)

Paratype: — VIETNAM. Bac Thai : Dai Tu, 1967, Be Kim khe s.n. ( HN!) .

Etymology: —The new specific epithet is dedicated to Nguyên Tien Hiep, one of the authors of Rubus caudatisepalus T. H. Nguyên & Yakovlev.

Additional specimens examined:— CHINA. Yunnan: Jingping county, Yongping village, Hetou Zhai , Laoling , 2200m, 9 May 1956, Sino-Russ. Exped. 1128 (IBSC-0323388, KUN- 689454, PE-00168928); Pingbian county , Jianshe village , Laojian Shan , 2140m, 19 March 1954, P. Y. Mao 03504 (IBSC-0323378, KUN-689452, KUN-689453, PE- 00168937, WUK-196043) .

Notes: —Based on two collections from northern Vietnam, Nguyên & Yakovlev (1982: 108) published the name Rubus caudatisepalus T. H. Nguyên & Yakovlev , which they placed it in sect. Corchorifolii Focke (1911: 129). The name R. caudatisepalus , however, had been previously used by Calderón (1973: 57) for a different Mexican species. Thus Nguyên & Yakovlev’s name is a later homonym of R. caudatisepalus Calderón and illegitimate. A replacement name (nomen novum), R. nguyenii Huan C. Wang , is proposed here.

Rubus nguyenii Huan C. Wang is very similar to R. corchorifolius Linn. f., a species widespread in East Asia, but differs from the latter by its stems nearly glabrous, leaves long acuminate at apex, lateral veins of leaves 9-11 pairs, sepals caudate at apex, styles pilose at base, and fruits nearly glabrous. This species has so far been reported only from northern Vietnam (Nguyên & Yakovlev 1982, Averyanov & Nguyên 1996), here two gatherings (Sino-Russ Exped.1128 and P. Y. Mao 03504) from southeastern Yunnan, China, are first reported for the flora of China.

Figures

FIGURE 1. Rubus nguyenii Huan C. Wang.A. Be Kim khe s.n. (HN), photographed by Do Van Hai. B. P. Y. Mao 03504 (KUN). C. Sino- Russ Exped.1128 (KUN). D. Flower. E. Fruit.