Craspedolobium unijugum (Gagnep.) Z. Wei & Pedley (2010: 189)

Song, Zhuqiu, Yao, Gang, Jiang, Kaiwen, Liao, Junjie & Xu, Dongxian, 2021, Spatholobus discolor, a new synonym of Craspedolobium unijugum (Fabaceae), Phytotaxa 489 (3), pp. 263-274 : 270-271

Craspedolobium unijugum (Gagnep.) Z. Wei & Pedley (2010: 189)

≡ Millettia unijuga Gagnepain (1913: 365) . Type :— LAOS. Xieng Khouang: C. J . Spire 446 (holotype, P01818114 !; isotype, P01818115 !) .

= Craspedolobium schochii Harms (1921: 135) . Type:— CHINA. Yunnan: Yunnanfu [Kunming], in valle versus mtem Mangan-shan, 2100 m, 28 July 1916, O. Schoch 261 (first-step lectotype, designated by Handel-Mazzetti (1933: 550), corrected from “ Typus ”, secondstep lectotype, WU0064624 !, designated here; isolectotypes, A00196736 !, US 00003974!) .

= Pueraria rigens Craib (1927: 380) . Type :— THAILAND. Sukotai: Kao Luang, 1100 m, 2 May 1922, A. F. G. Kerr 5924 (holotype, BM000997279 !; isotype, BK 258025 !) .

= Spatholobus discolor C. F. Wei (1985: 49) . Type:— CHINA. Yunnan: Lüchun, to Baqishan , 1700 m, 17 September 1973, De-Ding Tao 91 (holotype, KUN1208115 !; isotypes, HITBC0011543 !, KUN0623267 !), syn. nov.

Description: —Evergreen woody lianas, large, up to 15 m long. Stems cylindrical, blackish brown, up to 20 cm in diameter; young shoots appressed puberulent, densely covered with brownish lenticels. Leaves pinnately trifoliolate, alternate, papery to subleathery, appressed puberulent to glabrescent above, appressed puberulent beneath, often turning black above when dry; rachis 3.5–8.5 cm long, including petiole 2.5–6.5 cm long; petiolules 3–5 mm long; terminal leaflet symmetric, wide obovate to narrow elliptic, (3–)4–8 (–12.5) × (1.5–)2–5(–9.6) cm, base cuneate to obtuse, apex rounded, sometimes emarginate or acuminate, often with a minute tip; lateral leaflets opposite, asymmetric; secondary nerves 4–6 on each side of midvein, obvious, looped near margin, prominent below; stipules ovate-triangular, blackish, apex acute, ca. 1.7–2 mm, persistent; stipels subulate, ca. 1–1.7 mm long, persistent. Pseudoracemes axillary and terminal, sometimes branched; each pseudoraceme 10–30 cm long, many flowered, with a tawny hairy rachis; brachyblasts wart-like, distinct, 2–3 mm long, usually with 5–7 flowers; pedicles short, about 2–3 mm long; primary bract ovate-triangular, scarious, inserted at base of brachyblast, caducous; secondary bracts, scarious, ovate-triangular, inserted at base of pedicle, caducous; bracteoles 2, ovate, inserted at the base of calyx, persistent. Flower purple to red, easily dropped off when open; calyx campanulate, 4-lobed, tawny sericeous on both sides; the upper lobe entire minutely 2-toothed at apex, the three lower lobes triangular, apex, ca. 3.0–3.6 × 2.0– 2.5 mm, the lower one longest, forming a cover for the corolla in bud; tube ca. 2.5 mm long; petals glabrous; standard suborbicular, ca. 7–10 × 7–10 mm, reflexed, emarginate at the apex, with a yellow-green patch and two reflexed auricles at base as well as a 1.5–2 mm claw; wing oblong, 7–8 × 2.5–3 mm, with two small auricles and a ca. 2 mm long claw at base of the blade; keel falcate, slightly larger than wing, 8–8.5 × 3.7 mm, with a 2–3 mm long claw; stamens 10, diadelphous, ca. 11 mm long, with small openings (fenestrae) at both sides at base; vexillary stamen free; anthers elliptic, yellow, ca. 0.6 × 0.3 mm; floral disk intrastaminal, annular, 10-lobed, ca. 0.5 mm long; ovary sericeous, slightly compressed, with 5–10 (usually 8) ovules, slightly stipitate; stiple sericeous, ca. 1–1.5 mm long; style inflexed, glabrous, extending out the staminal tube; stigma minutely capitate. Pod thin woody, flat, narrow oblong, 3–8 × 0.9–1.5 cm, tawny sericeous outside, brown and dehiscent when mature, with a narrow wing on the upper suture and a clear beak at apex; wing 1–2 mm wide; beak 2–5 mm long. Seeds (1–)3–5(–7) per legume, flat, reniform, 5–7 × 3.2–4.5 × 1.0– 1.5 mm, light green at first and black when mature, smooth and shiny; hilum central. Flowering from June to October, and fruiting from July to December. It grows in sparse woodlands, open forests or secondary forests at an elevation of 200–2500 m above sea level.

Notes: — Craspedolobium was long considered as an endemic genus to China ( Hu 1955, Hutchinson 1964, Geesink 1984, Ying & Zhang 1994, Wei, 1994, 2001, Wu et al. 2007, Zhu 2012, Li 2020), but it was also found in Laos, Myanmar, and Thailand ( Lôc 1998, Lôc & Vidal 2001, Kumar & Sane 2003, Xu et al. 2008, Wei & Padley 2010). One collection from Muséum National d’Histoire Naturelle (P. K. Loc & N. Q. Truong HAL10380B, barcode P03602385, P03602386) cited in this study showed that Craspedolobium is a new genus record for the flora of Vietnam ( Fig. 5 ). This taxon is worthy of monitoring actions for its in situ and ex situ conservation ( Perrino & Wagensommer 2021), as well as detailed studies for a better definition on its ecology, vegetation, and identification of any threats.

In morphology, we found that this taxon has three different types of bracts in the inflorescences, i.e. a primary one at base of each brachyblast, a secondary one at base of each pedicle, and two bracteoles at base of each calyx, as given in the description above and as showed in Fig. 3F . The examination of bracts may be important for the understanding in the evolution of inflorescences. In addition, the floral disk character of this taxon was unclear in previous studies. Most authors did not referred its disk in the descriptions ( Harms 1921, Hu 1955, Hutchinson 1964, Wei 1994, 2001, Sun 2006, Wei & Padley 2010). Lôc (1998) pointed out this genus has no disk, while Geesink (1984) stated its disk is distinct. Our observations showed that this taxon has a 10-lobed annular disk (about 0.5 mm tall) around base of ovary.

Specimens examined:— CHINA. Guangxi: Longlin, 750 m, 23 October 1957, C. C . Chang 10291 ( IBK, IBSC, KUN), 800 m, 24 October 1957, C. C . Chang 10606 ( IBK, IBSC), 6 November 1957, Nanzhidi 4870 ( IBSC), 1 June 1977, T. H . Wei 3-0830 ( GXMI), 1200 m, 21 June 1956, Y. K . Li 335 ( IBK, IBSC, PE), 800 m, 27 September 1956, Z. Y . Wei 267 ( IBK); Napo , 350 m, 6 December 1958, C. C . Chang 13375 ( IBK, IBSC), 747 m, 7 October 2007, J . Xu 50 ( KUN); Tianlin , 578 m, 10 August 2013, Tianlin Exped. 451029130810008 ( GXMG, GXMI) ; Guizhou: Anlong, 1200 m, 10 June 1960, Guizhou Exped. 4183 ( IBSC, NAS, PE), 8 October 1929, P. C . Chung 1665 ( KUN); Ceheng , 940 m, 17 November 1986, Longtan Exped. 973 ( IBK); Xingyi, Anonymous 166 ( HGAS), 1000 m, 11 July 1960, Guizhou Exped. 6038 ( IBSC, NAS, PE), 1250 m, 19 July 1960, Guizhou Exped. 6311 ( HGAS, IBSC, KUN, NAS, PE), 1200 m, 19 July 1960, Guizhou Exped. 6323 ( HGAS, IBSC, PE), 10 August 1929, P. C . Chung 1665 ( IBSC) ; Sichuan: Butuo, 24 May 1979, Anonymous 150 ( SM); Dechang , 1900‒2400 m, 10 July 1983, Anonymous 18 ( KUN), 2100 m, 10 July 1983, Anonymous s.n. ( KUN), 2260 m, 26 August 1959, S. F . Zhu 20138 ( PE), 1750 m, S. K . Wu 966 ( PE), 1750 m, 5 July 1976, Xinan Normal Univ. Dept. Bio. Exped. 12027 ( CDBI, PE); Huidong , 1800 m, 15 July 1978, H. N . Wang et al. 359 ( SM); Huili , 29 June 1960, C. Z . Gao 60-1137 ( SZ), 1950 m, 30 June 1978, Q. S . Zhao & G . Hu 5712 ( CDBI), 2300 m, 18 July 1976, Sichuan Floral Exped. 12478 ( CDBI); Miyi , 1900 m, 18 July 1978, Dechang Exped. 197 ( SM), 1100 m, 28 July 1963, Miyi Exped. 152 ( CDBI), 2300 m, 12 July 1983, Qinghai-Tibet Exped. 11966 ( KUN, PE), 23 June 1958, S. Y . Chen et al. 10379 ( SZ), 24 July 1958, S. Y . Chen et al. 10830 ( SZ), 2300 m, 4 August 1958, S. Y . Chen et al. 11132 ( NAS, SZ), 2210 m, 1 July 1983, Z . X. Li & H. Q . Liu 909 ( CDBI); Ningnan, 1970 m, 4 July 1978, Ningnan Exped. 256 ( SM); Puge , 1450 m, 8 June 1979, Puge Exped. 267 ( SM), 19 August 1959, Sichuan Econ. Pl. Exped. 5459 ( KUN, PE), 1625 m, 20 April 1959, Z. T . Guan 9253 ( PE); Shimian , 13 July 1955, C. T . Hsieh 41780 ( IBSC, PE, SZ, WUK); Xichang , 1800 m, 13 June 1979, Guo 1031 ( SM), 4 August 2007, J . Xu 2102 ( KUN), 1700 m, 7 September 1957, Sichuan Dept. Exped. 2429 ( CDBI), 2500 m, 8 July 1932, T. T . Yu 1171 ( IBSC, PE), 2500 m, 19 August 1959, Western Sichuan Exped. 2335 ( KUN, PE), 24 September 1930, Z. P . Huang et al. 2063 ( KUN, WUK); Yanbian , 2100 m, 31 July 2003, Y. L . Peng & H. L . Zhao 6223 ( CDBI); Zhaojue, 1900 m, 16 May 1979, Zhaojue Exped. 355 ( SM); without precise locality, 1959, Western Sichuan Exped. 996 ( KUN) ; Yunnan: Anning, 1880 m, 17 August 2006, E . D. Liu 1830 ( KUN), 2000 m, 6 September 2006, J . Xu 2 ( KUN); Cangyuan , 1289 m, 31 August 2013, C . Liu et al. 13 CS6612 ( KUN), 900 m, 29 October 1989, G . D. Tao 39927 ( HITBC, KUN), 1300 m, 31 August 1980, S. T . Li 858 ( KUN), 1200 m, 10 September 1980, S. T . Li 1099 ( KUN), 950 m, 9 September 1980, S. T . Li 80-1063 ( KUN); Chuxiong , 2000 m, 26 September 1939, M. K . Li 249 ( IBK, IBSC, KUN, PE); Eshan , 1640 m, 9 October 1988, Eshan Exped. 501 ( KUN), 1900 m, 13 October 1988, Eshan Exped. 740 ( KUN), 1800 m, 11 June 1933, H. T . Tsai 53530 ( KUN, PE), 4 July 1989, Yuxi Exped. 89-076 ( KUN), 1740 m, 5 July 1989, Yuxi Exped. 89-109 ( KUN), 1470 m, 7 July 1989, Yuxi Exped. 89-277 ( KUN); Fumin , 2300 m, 20 October 1964, P. Y . Chiu 596159 ( KUN, PE), 1800 m, 11 May 2013, Y. H . Zhang et al. KC-0022 ( KUN); Gengma , 950 m, 9 November 1958, T. P . Zhu 402 ( IBSC, KUN); Guangnan , 1175 m, 3 August 2015, Guangnan Exped. 5326270111 ( IMDY); Huaning, 1720 m, 26 September 1990, Yuxi Exped. 903506 ( KUN), 2000 m, 28 September 1990, Yuxi Exped. 903570 ( KUN), 1520 m, 29 September 1990, Yuxi Exped. 903643 ( KUN); Jiangcheng, 1596 m, 19 July 2012, Jiangcheng Exped. 5308260489 ( IMDY), 1200 m, 27 February 2011, S. S . Zhou 8082 ( HITBC), 16 August 2011, S. S . Zhou 10648 ( HITBC), 1100 m, 31 July 1961, Y. H . Li 3349 ( HITBC, IBSC, KUN), 1280 m, 27 September 2009, Y. M . Lu & Z. Q . Zhang 2009090-1 ( PE), 1280 m, 27 September 2009, Y. M . Lu & Z. Q . Zhang 2009090-2 ( PE), 1280 m, 27 September 2009, Y. M . Lu & Z. Q . Zhang 2009090-3 ( PE); Jianshui , 21 March 1941, T. N . Liou 18369 ( IBSC, KUN, PE); Jingdong , 2350 m, 4 October 2003, G. P . Yang 307 ( HITBC, PE), 2140 m, 23 October 1993, H . Peng 1503 ( KUN), 1800 m, 12 June 1993, H . Peng & B . Bai 189 ( KUN), 1850 m, 15 June 1993, H . Peng & B . Bai 293 ( KUN), 1750 m, 30 June 1993, H . Peng & B . Bai 898 ( KUN), 980 m, 24 December 1939, M. K . Li 1608 ( IBK, IBSC, KUN, PE, WUK), 1080 m, 1 June 1939, M. K . Li 1683 ( IBSC, KUN, PE, WUK), 2100 m, 5 June 1963, Q. A . Wu 9472 ( KUN), 2190 m, 23 October 2008, Z. H . Luo et al. JDNR067 ( KUN); Jinggu , 900 m, 5 October 2001, Z. Z . Tao 120 ( HITBC); Jinghong , 1050 m, August 1936, C. W . Wang 75707 ( PE), 1200 m, September 1936, C. W . Wang 75879 ( KUN, NAS, PE), 6 October 1981, G . D. Tao 15916 ( HITBC, IBSC, PE), 800 m, 7 August 1977, G . D. Tao 16347 ( HITBC, KUN), 1300 m, 2 August 1977, G . D. Tao 16475 ( HITBC), 750 m, 10 August 1977, G . D. Tao 16790 ( HITBC, IBSC, KUN), 930 m, 12 August 1977, G . D. Tao 17024 ( HITBC, KUN), 830 m, 12 August 1977, G . D. Tao 17083 ( HITBC, KUN), 15 October 1978, G . D. Tao 19691 ( HITBC), 8 October 1955, P. I . Mao 6525 ( IBSC, KUN, PE), 760 m, 28 October 1955, P. I . Mao 7002 ( KUN, LBG, PE, SZ, WUK), 1400 m, 4 November 1973, P. Z . Zhu 10537 ( HITBC, IBSC), 3 December 1961, Y. W . Sun 1074 ( LZU); Jinping , 1409 m, 10 September 2012, Jinping Exped. 5325300673 ( IMDY), 1700 m, 25 October 1999, Z. K . Zhou et al. 514 ( KUN, PE); Kunming , Anonymous 1197 ( PE), 1939, Anonymous RN 2050 ( PEY), Anonymous RN 2051 ( PEY), 29 July 1963, B. H . Yang 101177 ( KUN), 1550‒2200 m, 1 November 1914, Handel-Mazzetti 5687 ( K), 13 August 1919, K. K . Chung 2187 ( PE), 6 August 1946, K. M . Feng 10110 ( KUN, PE), 26 August 1953, K. M . Feng 50173 ( IBSC, KUN, PE, SZ, WUK), 25 July 1955, K. M . Feng 50934 ( IBSC, KUN, PE, SZ), 2100 m, 28 July 1916, O . Schoch 261 ( US, WU), 25 April 1957, P. Y . Chiu 54506 ( KUN, PE), 2200 m, 22 October 1957, P. Y . Chiu 55261 ( KUN, PE), 2200 m, 8 July 1958, P. Y . Chiu 57071 ( IBSC, KUN), 1000 m, 9 August 2002, S . X. Zhu & Y . Kang 4 ( PE), 2000 m, 18 June 1945, T. N . Liou 13607 ( IBSC, KUN, PE), 2200 m, 25 November 1945, T. N . Liou 14531 ( IBSC, KUN, PE), 2000 m, 20 December 1945, T. N . Liou 14818 ( IBSC, PE), 1941, T. N . Liou 20078 ( IBSC, PE), 26 August 1946, T. N . Liou 20732 ( IBSC, KUN, PE), 6 September 1946, T. N . Liou 20818 ( PE), 2000 m, 18 October 1955, W. S . Liou 51360 ( IBSC, KUN, PE, SZ), 200 m, 16 October 1978, Y. T . Zhang 78181 ( FJSI), 29 July 1963, Z. H . Yang 101177 ( KUN); Lancang, 20 June 1970, Anonymous 6159 ( HITBC); Lincang , 1850 m, 28 September 1938, T. T . Yu 17760 ( KUN, PE); Lufeng , 1700 m, 30 June 1933, H. T . Tsai 53637 ( IBSC, KUN, PE, SZ, WUK); Lunan , 24 September 2013, L. C . Yan 362 ( HITBC); Luoping , 780 m, 24 November 1984, H . Sun et al. 530 ( KUN), Luquan , July 1961, X. N . Wang 61-0081 ( GXMI); Lüchun , 1700 m, 17 September 1973, D. D. Tao 91 ( HITBC, KUN), 1700 m, 17 September 1973, D. D. Tao 117 ( HITBC, IBSC, KUN), 1200 m, 5 October 2005, H . Wang 7877 ( HITBC), 840‒1300 m, 1 November 1995, S. K . Wu et al. 860 ( KUN), 1856 m, 11 November 2007, T . Zhang et al. SCSB-B-000575 ( KUN), 1000 m, 18 October 2000, Y. M . Shui & W. H . Chen 13115 ( KUN), 1100 m, 22 October 2000, Y. M . Shui & W. H . Chen 13642 ( KUN); Maguan, 1110 m, 10 July 2015, Maguang Exped. 5326251038 ( IMDY), 1108 m, 10 July 2015, Maguang Exped. 5326251045 ( IMDY); Malipo , 912 m, 21 March 2018, E . D. Liu 8621 ( KUN), 548 m, 9 December 2009, T . Zhang et al. 09 CS1478 ( KUN), 520 m, 22 October 1998, Y. Z . Wang et al. 4584 ( PE); Menghai , 1250 m, 16 October 1998, B. G . Li et al. 9810109 ( HITBC), 1380 m, June 1936, C. W . Wang 75149 ( IBSC, KUN, LBG, NAS, PE, WUK), 1400 m, June 1936, C. W . Wang 77114 ( KUN, NAS, PE), 1400 m, July 1936, C. W . Wang 77208 ( KUN, NAS, PE), 1100 m, 7 October 1959, H. T . Tsai 10489 ( KUN), 1200 m, 10 July 2011, J. W . Li 771 ( HITBC), 1150 m, 28 August 1958, K. L . Le 162 ( KUN), 1139 m, 3 July 2012, Menghai Exped. 5328220598 ( IMDY), 1205 m, 29 August 2012, Menghai Exped. 5328220746 ( IMDY), 16 November 1955, P. I . Mao 7309 ( IBSC, KUN, PE, SZ, WUK), 1200 m, 5 June 1998, T. G . Gao 1233 ( PE), 28 December 1959, Z. W . Lin et al. 143 ( KUN); Mengla , 900 m, November 1936, C. W . Wang 80695 ( KUN, NAS, PE), 850 m, November 1936, C. W . Wang 80842 ( IBSC, KUN, LBG, PE, WUK), 900 m, 31 October 1983, Mengla Exped. 32754 ( HITBC), 1267 m, 29 June 2015, Mengla Exped. 5328230373 ( IMDY), 1209 m, 24 November 2015, Mengla Exped. 5328231334 ( IMDY), 600 m, 9 October 1959, S. J . Pei 10867 ( KUN), 1200 m, 29 August 1959, S. J . Pei 59- 9851 ( KUN), 784 m, 19 March 2012, Y. J . Guo et al. 12 CS4910 ( KUN), 730 m, 19 January 1990, Z. N . Chen 189 ( IBSC); Menglian , 1000 m, 19 October 1989, G . D. Tao 39574 ( HITBC), 1000 m, 19 October 1989, G . D. Tao 39574 ( KUN), 980 m, 14 July 1973, Menglian Exped. 9484 ( HITBC, KUN), 1650 m, 23 July 1973, Menglian Exped. 9585 ( HITBC, IBSC, KUN), 1680 m, 9 November 2010, S. S . Zhou 7819 ( HITBC); Mengzi , A . Henry 9241 ( US), 1800 m, A . Henry 9241 A ( MO, US), 1830 m, A . Henry 9241 C ( PE); Midu, 1780 m, 30 July 2012, Midu Exped. 5329250456 ( IMDY); Mojiang , 600‒2000 m, 13 July 2013, H . Sun et al. KC-0167 ( KUN); Mouding , 2050 m, 16 September 2006, J . Xu 3 ( KUN), 2043 m, 22 November 2010, Y. N . Zhang Ouxk-0061 ( KUN); Nanjian , 1384 m, 1 July 2015, E . D. Liu et al. 4390 ( IBSC, KUN), 1948 m, 19 July 2019, E . D. Liu et al. YiMu 40 ( KUN); Pingbian , 1380 m, 17 September 1939, C. W . Wang 81810 ( KUN, PE), 7 June 1934, H. T . Tsai 62360 ( IBSC, KUN, PE); Puer , 1800‒2000 m, 23 August 1984, Anonymous 142 ( KUN), 1600 m, 2 August 2006, E . D. Liu 1782 ( IBSC, KUN, PE), 1300 m, 14 July 2001, H . Wang 4895 ( HITBC, IBSC, PE), 1340 m, 3 January 2008, J. K . Ye YN0095 ( KUN), 1450 m, 14 September 1955, P. I . Mao 5862 ( IBSC, KUN, PE, SZ, WUK), 26 July 2012, S. J . Li et al. 3332 ( IBSC), 16 June 2011, S. S . Zhou 9945 ( HITBC), 17 June 2011, S. S . Zhou 10016 ( HITBC), 2 September 2011, S. S . Zhou 10796 ( HITBC), 1670 m, 31 October 2012, Simao Exped. 5308020868 ( IMDY), 1200 m, 2 September 2001, Z. Z . Tao 41 ( HITBC); Qiubei , 1640 m, 9 June 2015, F . Du et al. 5326260932 ( IMDY), 1400 m, 13 July 1982, Q. A . Wu & S. W . Yu 895 ( KUN); Shiping , 1460 m, 15 October 2005, E . D. Liu 1378 ( KUN), 2000 m, 20 May 1933, H. T . Tsai 53360 ( IBSC, KUN, NAS, PE); Shizong , 1750 m, 12August 1985, S. C . He 85256 ( IBSC), 17 November 1984, W . X. Xu et al. 236 ( KUN); Shuangjiang , 1100‒2100 m, 9 September 1957, J. S . Xin 772 ( IBSC, KUN, PE, WUK); Tonghai , 2077 m, 21 September 2006, J . Xu 4 ( KUN), 15 July 1958, P. Y . Chiu 57164 ( KUN), 1900 m, 11 August 1989, Yuxi Exped. 703 ( KUN), 2000 m, 12 August 1989, Yuxi Exped. 774 ( KUN); Wenshan , 1413 m, 20 October 2019, Y. S . Chen et al. WS0828 ( IBSC); Xichou , November 1943, P. C . Tsoong & K. Z . Kuang 846 ( IBK, PE); Xinping , 1804 m, 9 August 2020, Z. Q . Song 202004 ( IBSC); Yanshan , 1200 m, 1 October 1939, C. W . Wang 84091 ( KUN, PE), 1200 m, 18 October 1939, C. W . Wang 84444 ( KUN, PE, WUK); Yimen , 1550 m, 11 July 1990, Anonymous 3246 ( KUN), 1680 m, 18 May 1982, H . Li et al. 912 ( KUN), 1914 m, 10 July 2007, J . Xu 70710 ( KUN); Yongren , 2017 m, 26 July 2006, H . Peng 5054 ( KUN); Yuanjiang , 1400‒1800 m, 23 October 1965, W. C . Yin 1757 ( KUN), 26 July 1987, X. F . Gao 277 ( KUN), 1624 m, 28 May 2012, Yuangjiang Exped. 5304280355 ( IMDY); Yuxi, 1750 m, 31 October 1989, Yuxi Exped. 1276 ( KUN); Zhenyuan , 1582 m, 15 October 2013, C . Liu et al. 13 CS6713 ( KUN), 1150 m, 31 October 1933, Y . Tsiang 12478 ( IBSC, KUN, NAS, PE, SZ, WUK); without precise locality, 19 July 1898, Bons d’Anty s.n. ( KUN, P), 1906, F . Ducloux 4154 ( P), 24 July 1902, J . Beauvais 1280 ( P), Kunming Station 4472 ( PE), T. N . Liou 818 ( IBSC), 13 July 1946, T. N . Liou 14469 ( IBSC), 24 June 1946, T. N . Liou 16366 ( IBSC, KUN), 13 July 1946, T. N . Liou 16469 ( IBSC, KUN), 26 August 1946, T. N . Liou 20732 ( IBSC), 6 September 1946, T. N . Liou 20820 ( IBSC), T. S . Chao 406 ( KUN), 1800 m, 26 June 1986, Z. H . Yang 86074 ( IBSC), 1750 m, 27 June 1986, Z. H . Yang 86084 ( IBSC) . LAOS. Attapu: Lamam, 26 April 2013, H . Sun et al. 14613 ( KUN) ; Luang Prabang: Phoukhoune, 1251 m, 18 November 2007, E . D. Liu 1934 ( KUN) ; Oudomxay: NaHong, 900 m, 30 November 1996, H . Wang 1227 ( HITBC) ; Xiangkhouang: Kham, 1043 m, 4 December 2013, H . Sun et al. 17356 ( KUN), 1043 m, 4 December 2013, H . Sun et al. 17357 ( KUN), 1043 m, 4 December 2013, H . Sun et al. 17394 ( KUN), 1304 m, 4 December 2013, H . Sun et al. 17531 ( KUN); Muong Seng , 218‒300 m, 12 September 1929, E . Poilane 16956 ( P), 1100 m, 8 February 1932, E . Poilane 20063 ( P); without precise locality, C. J . Spire 446 ( P) . MYANMAR. Southern Shan States: Keng Tung, 1830 m, 15 October 1909, R. W . MacGregor 948 ( E) . THAILAND. Chiang Mai: Amphoe Chom Thong, 1425 m, 21 July 1991, J. F . Maxwell 91- 700 ( E, L, P), 1275 m, 12 August 1998, J. F . Maxwell 98-842 ( L); Samoeng , 1375 m, 16 May 1993, J. F . Maxwell 93-445 ( L), 1375 m, 20 July 1997, J. F . Maxwell 97-784 ( L); San Sai , 1100 m, 22 May 1993, J. F . Maxwell 93-463 ( L) ; Chiang Rai: Wiang Pa Pao, 1200 m, 31 December 1997, J. F . Maxwell 97-1550 ( L) ; Lampang: Mueang Pan, 1225 m, 23 June 1996, J. F . Maxwell 96-865 ( L) ; Phitsanulok: Nakhon Thai, 1287 m, 27 October 2014, A. N . Egan 13-0681 ( US) ; Sukotai: Kao Luang, 1100 m, 2 May 1922, A. F. G . Kerr 5924 ( BK, BM) . VIETNAM. Yen Bai: Mu Cang Chai, 104°01′E, 21°53′N, 900 m, 8 December 2006, P. K . Loc & N. Q . Truong HAL 10380 B ( P) .

Figures

FIGURE 3. Craspedolobium unijugum (Gagnep.) Z. Wei & Pedley. A. habit; B. flowering branchlets; C. trifoliolate leaf as well as the minute tips and variation of apex of terminal leaflets; D. flowering and fruiting branchlets; E. branchlet with numerous lenticels; F. part of inflorescence with unopen flowers; G. immature pods; H. immature green pods, showing the narrow wing on the upper suture as well as four well developed and four abortive seeds; I. brown and dehiscent pods when mature. Scale bar = 1 cm.

FIGURE 5. Distribution map of Craspedolobium unijugum (Gagnep.) Z. Wei & Pedley based on all specimen records cited in this study (blue points, made by the software ArcGIS 10.2).