5. Huchimingia weizhii (Z.Q. Song) Z.Q. Song, comb. nov.

≡ Millettia weizhii Z.Q. Song, Nordic J. Bot. 37(3)-e01964: 2, Figs. 1–3. 2019 (Song et al. 2019).

Type: CHINA. Yunnan Province, Mengla County, Mengyuan, Daoban, 995 m, 8 Apr 2013, Jian-Wu Li 2986 (holotype: HITBC! [150677] ; isotype: KUN! [1251989]).

Description. A full description for this species was provided by Song et al. (2019).

Distribution and ecology. Huchimingia weizhii is known from China (Yunnan). It grows in limestone forests at an altitude of 700–1000 m. It flowers before leaves expand, from January to February, and fruits from March to September. This species was recently evaluated as ‘Endangered’ (EN) by Song et al. (2019).

Notes. Due to its standard petal with inflexed auricles and pods with four wings, this species was previously placed in Millettia sect. Fragiliflorae Dunn by Song et al. (2019), who also pointed out its similarity with Millettia sect. Podocarpae Dunn. But it should be included in the genus Huchimingia by having large, subglobose, scaly buds (Fig. 3E), pseudoracemes with very indistinct brachyblasts, two flowers on each brachyblast, conspicuous large bracts (mistakenly described as bracteoles by Song et al. (2019)), ebracteolate calyx, hollow receptacle, and stipitate ovary and pod (Fig. 3F). The systematic position of this species within Huchimingia was also well supported by molecular evidence (Fig. 1).

Additional specimens examined. CHINA. Yunnan: Mengla, 780 m, 15 May 1962, Yan-Hui Li 4100 (HITBC [HITBC0012680], KUN [0618089]), 900 m, 2 Jun 1982, Exped. 32690 (HITBC [HITBC0013679]), 1000 m, Sep 1992, Hong Wang 1223 (HITBC [HITBC0013678]), Hong Wang 1246 (HITBC [HITBC0013677]), 995 m, 21 Dec 2017, Zhu-Qiu Song 2017006 (IBSC), 995 m, 31 Jan 2018, Kai Zhang 007 (IBSC), 25 Apr 2019, Bin Yang G2-248 (HITBC), 9 May 2019, Bin Yang G2-408 (HITBC), 20 Aug 2020, Zhu-Qiu Song 202038 (IBSC), 30 Mar 2021, Zhu-Qiu Song 2021014 (IBSC).