Chamaesium viridiflorum (Franch.) Wolff ex Shan (1937: 87)

Guo, Xian Lin, Wang, Chang Bao, Wen, Jun, Zhou, Songdong & He, Xing Jin, 2018, Phylogeny of Chinese Chamaesium (Apiaceae: Apioideae) inferred from ITS, cpDNA and morphological characters, Phytotaxa 376 (1), pp. 1-16 : 12

Chamaesium viridiflorum (Franch.) Wolff ex Shan (1937: 87)

≡ Trachydium viridiflorum Franchet (1894: 111) ( Fig. 8 )

Type: CHINA. Yunnan: Mt. Maer , 3500 m, 10 September 1889, J.M.Delavay 3900 (lectotype: K001091336!, designated by Mukherjee and Constance, 1993: 33; isolectotypes: P00245465 !, P00834667 !) .

= Chamaesium markgrafianum (Fedde ex Wolff) Norman (1938: 231)

≡ Trachydium markgrafianum Fedde ex Wolff (1930: 304) . Type: CHINA. Xizang: Glacier Lake Camp, 13000–14000 ft (About 3900– 4300 m), on north facing earth slopes, well clothed with vegetation and Rhododendron scrub, 29 July 1921, Kingdon-Ward 4662 (holotype: E00000255!).

Notes: — Chamaesium viridiflorum usually possess obsolete bracteoles and leaf-like bracts, torulose rhizome and broadly obovate to fan-shaped segments of leaves. The petals are usually greenish. The size of the fruit is only half of the other Chamaesium species. The characters mentioned above is sufficient to distinguish it from other Chamaesium species.

Distribution in China: — Yunnan, Sichuan. Endemic. ( Fig. 3 )

Habitat: — Chamaesium viridiflorum usually grows under Forests and Bushes, and occupied very humid areas, which is suitable for growth of Moss. Its torulose rhizome is adaptable structure to fix on the soft ground environment.

Specimens examined: — CHINA. Yunnan: without specific locality, X.T.Cai 58177 (KUN); Lianda team 20582 (KUN); Weixi Lisu Autonomous Xian, Yezhi, 3600 m, 8 August 1935, Q. W. Wang 68506 (KUN); Shangri-La Xian, Mt. Haba, 31 August 1962, 4100 m, Zhongdian Team 1759 (KUN); Shangri-La Xian, 4200 m, 8 September 1962, Zhongdian Team 1929 (KUN); Shangri-La Xian, 4225 m, 15 July 2015, X.L.Guo & X.M.Zeng GXL15071501 (SZ); Shangri-La Xian, Mt. Zhuaci, 19 July 1938, D. J.Yu 12282 (KUN); Shangri-La Xian, Baikaluo, 3700 m, 26 August 1962, zhongdian team 1381 (KUN); Shangri-La Xian, Mt. Tianbao, 10 August 1981, Beijing hengduan team 2807 (PE); Fugong Xian, Mt. Biluo, 4200 m, 9 Septenber 1964, S.G.Wu 8736 (KUN)(LBG); Lijiang Xian, ladaoge, 22 October 1939, Y.Z.Zhao 21977 (KUN). Sichuan: without specific locality, X.T.Cai 581772 (KUN); Dawu Xian, Songlinkou, 1 July 1974, Sichuan plant research team 1328 (PE); Kangding Xian, Mt. Gaoersi, 4250 m, 25 July 1981, Z.J.Zhao, J.B.Shi & D.G.Fan 115118 (SZ); Luding Xian, Yala, 3500 m, 23 September 2015, X.L.Guo, Y.Zhong & C.Peng GXL16092301 (SZ).

Figures

FIGURE 3. Geographic distribution of Chamaesium in China.

FIGURE 8. Chamaesium viridiflorum. A. cross section of mericarp; B. segment of basal leaf; C. habit; D. flowering umbellet with bracteoles; E. dorsal view of mericarps. [A, B, D, E from GXL1507150101; C from GXL1507150102].