Thalictrum diffusiflorum Marquand & Shaw

Yuan, Qiong & Yang, Qin-Er, 2017, Thalictrum callianthum (Ranunculaceae) is merged with T. diffusiflorum, Phytotaxa 307 (4), pp. 285-291 : 290

Thalictrum diffusiflorum Marquand & Shaw in Marquand (1929: 153). Figs. 1–3 .

Type:— CHINA. Xizang: Nyingchi, Tumbatse, in sheltered pastures and thickets, under trees or bushes, etc., 3600 m a.s.l., 7 July 1924, F.

Kingdon-Ward 5899 (holotype K!; isotype K!). Fig. 2 . = Thalictrum callianthum Wang (2013: 583) , syn. nov. Type:— CHINA. Xizang: Mainling (= Milin), Paiqu , Gega village , in thickets, 3400 m a.s.l., 1 August 2012, Y. Yang et al. 471 (holotype

PE!; isotypes PE!). Fig.1A, B .

For a full description of this species see Marquand & Shaw in Marquand (1929), Wang & Wang (1979), Wang (1985), and Fu & Zhu (2001).

Distribution and habitat: — Thalictrum diffusiflorum is distributed in south-east Xizang, China ( Fig. 5 ). It occurs in forests, thickets or grassy places along streamside at elevations of 2900–3800 m above sea level.

Phenology: —Flowering June to August; fruiting September.

Additional specimens examined: — CHINA. Xizang: Bomi, Anonymous 76-289 (PE), Anonymous 2224 (PE), Y. T. Chang & K.Y. Lang 611 (PE), Y. Fei et al. 201 (KUN), R.F. Huang 728 (HNWP), H.N. Qin et al. 332 (PE), T.S. Ying & D.Y. Hong 866 (PE); Gongbo’gyamda, Anonymous 2121 (PE); Mainling, B.S. Li et al. 5766 (PE), C. C. Ni et al. 2867 (PE), Qinghai-Xizang Exped. 74-3715 (KUN, PE), Qinghai-Xizang Supp. Exped. 750846 (KUN, PE), Xizang Trad. Chin. Med. Exped. 4102 (PE); Nangxian, Z.S. Ren 194 (PE); Nyingchi, Y. T. Chang & K.Y. Lang 997 (PE), Y. Fei et al. 307 (KUN), X.F. Jin 3134 (PE), B.S. Li et al. 6221 (PE), J. Luo et al. 253 (HNWP), Qinghai-Xizang Supp. Exped. 751272 (KUN, PE), Xizang Trad. Chin. Med. Exped. 3313 (PE).

Figures

FIGURE 1. Holotype and isotype sheets of Thalictrum callianthum (= T. diffusiflorum), showing habit (A, B) and pubescence (C–H). A. Holotype sheet (PE). B. Isotype sheet (PE). C. Carpels from holotype. D. Carpels from isotype. E. Leaf (abaxial side) from holotype. F. Leaves from isotype. G. Portion of flowering branch from holotype. H. Portion of flowering branch from isotype.

FIGURE 2. Holotype sheet (A) and isotype sheet (B) of Thalictrum diffusiflorum.

FIGURE 3. Specimens of Thalictrum diffusiflorum. A. China, south-east Xizang, Bomi, Zamu, Y.T. Chang & K.Y. Lang 611 (PE). B. China, south-east Xizang, Mainling, Wolong, C.C. Ni et al. 2867 (PE). C. China, south-east Xizang, Mainling, Jiage, C.C. Ni et al. 2867 (PE). C. China, south-east Xizang, Nyingchi, Lulang, Y. T. Chang & K.Y. Lang 997 (PE).

FIGURE 5. Distribution of Thalictrum diffusiflorum (●).