J. Jpn. Bot. 84: 197–223 (2009) A Revision of Lespedeza Subgenus Macrolespedeza (Leguminosae) in China a b c Hiroyoshi ohashi , Tomoyuki nemoto and Kazuaki ohashi aBotanical Gardens, Tohoku University, Sendai, 980-0862 JAPAN; E-mail: [email protected] bDepartment of Basic Sciences, Faculty of Science and Engineering, Ishinomaki Senshu University, Ishinomaki, Miyagi, 986-8580 JAPAN; cSchool of Pharmacy, Iwate Medical University, Yahaba, Iwate, 028-3694 JAPAN (Received on March 5, 2009) Chinese members of subgenus Macrolespedeza in the genus Lespedeza are revised. Eight species are recognized in China. A key to the species, bibliography of the species, and synonyms are provided. Lespedeza dunnii Schindl. and L. fordii Schindl. are newly accommodated in the section Heteroloespedeza. Lespedeza thunbergii is divided into newly circumscribed subsp. thunbergii, subsp. formosa (Vogel) H. Ohashi and subsp. elliptica (Benth. ex Maxim.) H. Ohashi (comb. nov.). Lespedeza formosa (Vog.) Koehne, L. patens Nakai, L. pubescens Hayata, L. viatorum Champ. ex Benth., and L. wilfordii Ricker in Flora Reipublicae Popularis Sinicae (FRPS) vol. 41 (1995) are regarded as synonyms with L. thunbergii (DC.) Nakai. Of the unknown species in FRPS L. hupehensis Ricker and L. merrillii Ricker are considered as synonyms of L. davidii and L. veitchii Ricker as a synonym of L. bicolor. Key words: China, classification, Desmodieae, Leguminosae, Lespedeza, Macrolespedeza, taxonomy. This paper is intended as a complement (Ohashi et al. 2009a). to the account of subgenus Macrolespedeza The present circumscription of the genus of the genus Lespedeza for the Flora of Lespedeza was proposed by Schindler (1913) China treatment (Flora of China vol. 10. who modified the subgenus Lespedeza in the Fabaceae. Editors: Z. Y. Wu, P. H. Raven sense of Maximowicz (1873). Schindler’s and D. Y. Hong in preparation). We provide generic concept has been followed in the here an introductory note on the subgenus in recent general systems of the tribe Desmodieae China, a key to the species, bibliography of in Hutchinson (1964), Ohashi et al. (1981) and all the species and synonyms, and taxonomic Ohashi (2005). notes especially on the species described by Maximowicz (1873) created section Ricker (1942, 1946) and L. thunbergii (DC.) Macrolespedeza under subgenus Lespedeza. Nakai. Most of these items are not included Schindler (1913) adopted the section under in the Flora of China treatment. This is also a genus Lespedeza. Nakai (1939) divided continuous paper from our previous revision section Macrolespedeza into two sections of Chinese Lespedeza subgenus Lespedeza Macrolespedeza s.s. and Heterolespedeza. —197— 198 植物研究雑誌 第 84 巻 第 4 号 2009 年 8 月 Ohashi (1982, 2001, 2005) adopted the generic paper (Table 1). concept of Schindler (1913), but raised the Meanwhile, Ricker (1942, 1946) described section to subgenus: subgen. Macrolespedeza 10 new species of Macrolespedeza of the (Maxim.) H. Ohashi, and accommodated genus from China: Lespedeza albiflora section Heterolespedeza Nakai in the subgenus. Ricker from Kwangtung (Guangdong); L. Li and Chen (1995) adopted sect. anhweiensis Ricker from Anhwei (Anhui); L. Macrolespedeza Maxim. for the Chinese bracteolata Ricker from the USA originated in Lespedeza in Flora Reipublicae Popularis China or Korea; L. chekiangensis Ricker from Sinicae (FRPS), but Ohashi’s system is Chekiang (Zhejiang); L. hupehensis Ricker followed in this paper. from Hupeh (Hubei); L. merrillii Ricker from Chekiang; L. metcalfii Ricker from Anhwei; Subgen. Macrolespedeza of China L. paradoxa Ricker from Anhwei; L. veichii Schindler (1913) recognized eight species of Ricker from Hupeh; and L. wilfordii Ricker Macrolespedeza in his revision, of which seven from Hongkong. These species were described were recorded from China. Akiyama (1988) based usually on a single herbarium specimen. recognized nine species of Macrolespedeza of His circumscription of the species is often which six were found in China. Li and Chen difficult to reconfirm, because his new species (1995) adopted 12 species in FRPS volume were distinguished from the known species 41 that is the most recent comprehensive often on the basis of such variable characters treatment of Macrolespedeza in China. A list as degree of hairs on branches or leaves, shape of the species of Macrolespedeza in these or size of leaflets, or size of calyx or flowers. three works is compared with our result in this Of the 10 species of Macrolespedeza Table 1. Chinese species of Lespedeza-Macrolespedeza recognized by Schindler (1913), Akiyama (1988), Li and Chen (1995) and the present study Schindler (1913) Akiyama (1988) Li and Chen (1995) Present study L. bicolor Turcz. L. bicolor L. bicolor L. bicolor L. buergeri Miq. L. buergeri L. buergeri L. buergeri L. cyrtobotrya Miq. L. cyrtobotrya L. cyrtobotrya L. cyrtobotrya L. davidii Franch. L. davidii L. davidii L. davidii L. dunnii Schindl. L. dunnii L. dunnii L. fordii Schindl. L. fordii L. fordii L. formosa (Vogel) L. formosa L. formosa L. thunbergii (DC.) Nakai Koehne L. friebeana Schindl. L. maximowiczii L. maximowiczii L. maximowiczii C. K. Schneid. L. patens auct. non Nakai (= L. thunbergii) L. pubescens Hayata (= L. thunbergii) L. viatorum (= L. thunbergii) Champ. ex Benth. L. wilfordii Ricker (= L. thunbergii) August 2009 Journal of Japanese Botany Vol. 84 No.4 199 described by Ricker from China, Akiyama Subgen. Macrolespedeza (Maxim.) H. (1988) listed seven species as imperfectly Ohashi in J. Jap. Bot. 57: 29 (1982); H. Ohashi known in her revision, and did not treat in K. Iwats. & al., Fl. Jap. IIb: 260 (2001). L. hupehensis, L. veichii and L. wilfordii. L. sect. Macrolespedeza Maxim. in Trudy Akiyama and Ohba (1988) regarded L. Imp. S.-Peterburgsk. Bot. Sada 2: 346 (1873) wilfordii as a synonym of L. formosa. Li as “Macro-lespedeza” sub subgen. Lespedeza; and Chen (1995) accepted L. wilfordii as Schindl. in Bot. Jahrb. Syst. 49: 574 (1913); correct species and regarded four species: L. S. Akiyama in Univ. Mus. Univ. Tokyo Bull. anhweiensis, L. chekiangensis, L. metcalfii (33): 91 (1988); Li & Chen in FRPS 41: 131 and L. paradoxa as synonyms of the known (1995). species in China. They treated four (L. L. sect. Archilespedeza Taub. in Engl. & albiflora, L. hupehensis, L. merrillii and L. Prantl, Nat. Pflanzenfam. 3, 3: 332 (1891), p. veitchii) as unknown and did not treat L. p. incl. A.[unranked] Macrolespedeza Maxim. bracteolata. ex Taub., cet. excl. Most of the type specimens of Ricker’s species were missing in A, GH and NY when Key to the species of China one of the author, H. Ohashi, had worked on 1a. Flowers chasmogamous and cleistogamous Chinese Lespedeza for the Flora of China (except L. forrestii), usually less than project in the Harvard University Herbaria 10 mm long (except L. gerardiana), in 2006 and 2007. He examined types of L. in more or less elongated racemes of anhweiensis, L. bracteolata and L. metcalfii chasmogamous flowers with basal and also examined fragmental specimens fascicles of cleistogamous flowers, or of a few flowers, fruits or leaflets of L. composed only of fasciculate racemes of chekiangensis, L. hupehensis, L. veitchii and cleistogamous flowers; standard white L. wilfordii kept in US. These fragmental to yellowish or reddish purple; loments specimens were considered as isotypes of sessile or subsessile; herbs to subshrubs the four species separated by Ricker from [subgenus Lespedeza] the holotype in his studies. Each of them is 1b. Flowers all chasmogamous, usually more packed in a small packet with Ricker’s memo than 10 mm long, in simple or compound and mounted with photographs of the type racemes; standard usually rose-purple specimen. Lespedeza merrillii was examined or reddish purple, rarely yellowish or only as a photograph of the type in NY. white; loments shortly stipitate; shrubs to Lespedeza albiflora and L. paradoxa were not subshrubs [subgenus Macrolespedeza] .. examined. Lespedeza bracteolata was referred ................................................................. 2 to L. buergeri Miq. (Ohashi et al. 2009b). 2a. Peduncles almost sessile, inflorescences In the present study, however, examinations not longer than subtending leaves; lateral of some of Richer’s species are insufficient and lowermost calyx-lobes acuminate to and further study is necessary for the missing caudate .................................................... 3 specimens at the moment. 2b. Peduncles distinct, inflorescences usually longer than subtending leaves; lateral and Taxonomic treatment lowermost calyx-lobes obtuse or acute to Lespedeza Michaux, Fl. Bor.-Amer. 2: 70 acuminate ............................................... 4 (1803); Li and Chen in FRPS 41: 131 (1995); 3a. Leaflets ovate, elliptic, or obovate to H. Ohashi & al. in J. Jpn. Bot. 84: 145 (2009). broadly obovate; bracteoles nearly half 200 植物研究雑誌 第 84 巻 第 4 号 2009 年 8 月 as long as calyx-tube; wings longer than Sect. 1. Heterolespedeza Nakai in J. Jap. keel; pods globose, less than 7 mm long .. Bot. 15: 531 (1939); H. Ohashi in K. Iwats. & .............................................L. cyrtobotrya al., Fl. Jap. IIb: 260 (2001). Type: Lespedeza 3b. Leaflets ovate-oblong; bracteoles as long buergeri Miq. as calyx-tube; wings equal to keel; pods L. ser. Heterolespedeza (Nakai) S. oblong, 13–15 mm long ............. L. fordii Akiyama & H. Ohba in Univ. Mus. Univ. 4a. Winter buds depressed, scales distichously Tokyo Bull. (33): 142 (1988). arranged; leaflets sharply acute,