Oxygraphis delavayi Franchet (1886: 374)

Yuan, Qiong & Yang, Qin-Er, 2017, Ranunculus angustisepalus (Ranunculaceae) is an Oxygraphis and conspecific with O. delavayi, Phytotaxa 319 (1), pp. 103-110 : 105-106

Oxygraphis delavayi Franchet (1886: 374) . Figs. 1 − 6 .

Type:— CHINA. Yunnan: Dali, Cang Shan (= Tsang-chan), alpine meadow at top of the mountain, 20 June 1884, J. M. Delavay 247

(lectotype here designated P-00186236!, isolectotype P-00186237!). Fig. 3 . = Ranunculus angustisepalus Wang (1995: 320) , syn. nov. Type:— CHINA. Xizang: Bomi, 35 km on the way from Bomi to Mêdog, grassy slope, 3600 m a.s.l., 4 August 1990, G. Yao et al. 3294

(holotype NAS!, isotypes XZE!). Figs. 1 & 2 . = Oxygraphis delavayi var. nyingchiensis Zheng (1999: 304) . Type:— CHINA. Xizang: Nyingchi, alpine meadow, 4500 m a.s.l., 4 July 1997, W. L. Zheng 1085 (holotype XZE!). Fig. 4D .

Notes:—For a full description of Oxygraphis delavayi see Franchet (1886), Liou (1980), and Wang et al. (2001). The flower descriptions given by Wang (1995) and Wang et al. (2001) for Ranunculus angustisepalus , particularly on the presence of an androgynophore and the number of stamens, are not accurate. The so-called androgynophore actually belongs to the exposed part of the receptacle after the falling of the stamens and petals. The stamens should be numerous, with most of them having fallen in the type material.

Among the four species of the genus Oxygraphis , O. delavayi is distinguished by the apically puberulent (vs. glabrous) scapes and papery, deciduous (vs. leathery or subleathery, persistent) sepals (Wang et al. 2001). From the flower colour as well as sepal shape and texture, the illustration of O. delavayi given by Wang (2016) in the Higher Plants of China in Colour should actually be referred to O. endlicheri ( Walpers 1842: 33) Bennet & Chandra (1982: 374) , a Himalayan species. In China, O. endlicheri is currently known only from southern Xizang (Yadong) (Wang et al. 2001).

Additional specimens examined: — CHINA. Sichuan: Barkam, C. L. Wu 32405 ( PE); Dujiangyan, D. Z. Fu & Z. L. Zhao 87-2351 ( HX); Maoxian, C. Ho & T. L. Chow 12692 ( IBSC, GXMI, LBG, PE, SZ); Pingwu, Mianyang Pref. Exped. 477 ( SM); Songpan, H. Smith 3269 ( PE). Xizang: Bomi, B. S. Li & S. Z. Cheng 645 ( PE), T. S. Ying & D. Y. Hong 1172 ( PE); Mainling, B. S. Li & S. Z. Cheng 5465 ( PE), C. C. Ni et al. 3011 ( PE); Mêdog, S. Z. Cheng & B. S. Li 59 ( PE), S. Z. Cheng & B. S. Li 99 ( PE), S. Z. Cheng & B. S. Li 116 ( PE), S. Z. Cheng & B. S. Li 130 ( PE). Yunnan: Binchuan, H. C. Wang 2013 ( PE); Dali, G. Forrest 11602 ( PE); Dêqên, K. M. Feng 5095 ( KUN), K. M. Feng 6202 ( KUN, PE), K. M. Feng 6619 ( KUN, PE), K. M. Feng 6665 ( KUN, PE), K. M. Feng 6864 ( KUN, PE), PE Hengduan Shan Exped. 3582 ( PE), T. T. Yu 8644 ( KUN, PE), T. T. Yu 8731 ( KUN, PE); Fugong, Gaoligong Shan Biod. Surv. 27132 ( PE); Gongshan, K. M. Feng 7768 ( KUN), K. M. Feng 7872 ( KUN, PE), Gaoligong Shan Biod. Surv. 31347 ( PE), Gaoligong Shan Biod. Surv. 31672 ( PE), S. Jiang et al. 9323 ( KUN, PE), T. T. Yu 19371 ( KUN, PE), T. T. Yu 19862 ( KUN, PE), T. T. Yu 22260 ( KUN, PE), T. T. Yu 22264 ( IBSC, KUN, PE), T. T. Yu 22277 ( KUN, PE), T. T. Yu 22359 ( KUN, PE), T. T. Yu 23193 ( KUN, PE); Weixi, K. M. Feng 4272 ( KUN, PE), PE Hengduan Shan Exped. 1498 ( PE).

Figures

FIGURE 1. Holotype sheet of Ranunculus angustisepalus (= Oxygraphis delavayi). Inset (left): flower, with the petals and most of the stamens having fallen. Inset (right): fruit (immature).

FIGURE 2. Isotype sheets of Ranunculus angustisepalus (= Oxygraphis delavayi). The insets show various flowers with the sepals, petals or stamens having at least partly fallen.

FIGURE 3. Lectotype sheet (A) and isolectotype sheet (B) of Oxygraphis delavayi.

FIGURE 4. Specimens of Oxygraphis delavayi from southeastern Xizang, China.A. Bomi, T.S. Ying & D.Y. Hong 1172 (PE). B. Mainling, B.S. Li & S.Z. Cheng 5465 (PE). C. Mêdog, S.Z. Cheng & B.S. Li 116 (PE). D. Nyingchi, W. L. Zheng 1085 (XZE, holotype of O. delavayi var. nyingchiensis).

FIGURE 5. Specimens of Oxygraphis delavayi from Weixi, northwestern Yunnan, China. A, B. PE Hengduan Shan Exped. 1498 (PE). C, D. K.M. Feng 4272 (KUN).

FIGURE 6. Oxygraphis delavayi in the wild.A.Galongla Shan, Bomi, southeastern Xizang, China.B. Dêqên-Gongshan pass, northwestern Yunnan, China.