Dichocarpum hypoglaucum Wang & Hsiao

Xie, Si-Nan, Yuan, Qiong & Yang, Qin-Er, 2017, Dichocarpum lobatipetalum and D. malipoense (Ranunculaceae) are both merged with D. hypoglaucum, Phytotaxa 298 (2), pp. 181-186 : 184-186

Dichocarpum hypoglaucum Wang & Hsiao in Hsiao & Wang (1964: 327). Figs. 1−4 .

Type:— CHINA. Yunnan, Xichou, Nanchang, in woods in ravine, 6 May 1959, C. A. Wu 7885 (holotype KUN!, isotype KUN!). Fig. 1 .

= Dichocarpum malipoense Tao (1989: 179 ; “ malipoenense ”), syn. nov.

Type:— CHINA. Yunnan, Malipo, Huang-Jing-Ying, 1300 m a.s.l., streamside in woods, 15 January 1940, C. W. Wang 83876 (holotype

KUN!). Fig. 2 . = Dichocarpum lobatipetalum W.T. Wang & B. Liu (2015: 275) , syn. nov. Type:— CHINA. Yunnan, Malipo, Xiajinchang Xiang, Yunling, Daxichang Village, 1537 m a.s.l., in woods on limestone hill, 2 April 2014,

B. Liu & Y. Yang 1958 (holotype PE!, isotype PE!). Fig. 3 .

For a full description of this species see Wang & Hsiao in Hsiao & Wang (1964), Hsiao (1979), Fei (2000), Fu & Robinson (2001), Wang & Liu (2015), and Wang (2016). The flower characters are given for the first time by Wang & Liu (2015).

Color illustrations: — Jiang et al. (2015), Wang (2016).

Distribution and habitat: — Dichocarpum hypoglaucum is currently known from Malipo and Xichou, south-east Yunnan, China ( Fig. 5 ). It grows in woods at elevations of 1300 to 1700 m above sea level, preferring a limestone habitat.

Phenology: —Flowering March to April; fruiting April to May.

Additional specimens examined: — CHINA. Yunnan: Malipo, Anonymous 6111 (HITBC), Y.M. Shui 20300 (PE), C.A. Wu 89068 (KUN); Xichou, D.Z. Fu 84329 (PE), S.Z. Wang 461 (KUN).

Note: —According to Tamura (1995), Dichocarpum hypoglaucum belongs to D. sect. Dichocarpum subsect. Dalzielia ( Tamura & Lauener 1968: 270) Tamura (1992: 54) . Its closest ally is D. dalzielii , a species widely distributed in China. The chromosome number of D. hypoglaucum is 2 n = 24 ( Yang et al. 1993), indicating this species is a tetraploid based on x = 6 ( Fu 1988).

Figures

FIGURE 1. Holotype (A) and isotype (B) sheets of Dichocarpum hypoglaucum.

FIGURE 2. Holotype sheet of Dichocarpum malipoense (= D. hypoglaucum).

FIGURE 3. Holotype (A) and isotype (B) sheets of Dichocarpum lobatipetalum (= D. hypoglaucum).

FIGURE 4. Specimens of Dichocarpum hypoglaucum. A. China, Yunnan, Malipo, Anonymous 6111 (HITBC). B. Same locality, Y.M. Shui et al. 20300 (PE; previously identified as D. malipoense).

FIGURE 5. Distribution of Dichocarpum hypoglaucum (●).