Chamaesium thalictrifolium Wolff (1926: 302)

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 thalictrifolium Wolff (1926: 302)

≡ Trachydium thalictrifolium (H.Wolff) Hiroe (1979: 714) ( Fig. 7 )

Type: CHINA. Sichuan: Hsioeh-shan , 3600 m. Ad fontem, 24. 07. 1922, H.Smith 3695 (lectotype: UPS BOT: V-070243!, designated by Pimenov 2017: 131; isolectotype: GB0048809 !) .

Notes: — Chamaesium thalictrifolium usually possess more larger segments of leaves than other species. The fruits are usually round. The ribs of fruit were obscure when mature, which was the unique character in Chamaesium . C. thalictrifolium usually taller more than 60 cm and also have very unequal rays and slender rhizome and numerous vittaes.

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

Habitat: —We found that C. thalictrifolium have diverse living environment including thick shrubs next to river, under forests, and humid marsh.

Specimens examined: — CHINA. Sichuan: Songpan Xian, without specific locality, 22 August 1928, W.P.Fang (NAS); Songpan Xian, Huangshengguan, 27 August, 1984, F.D.Pu et al. 150 (NAS); Songpan Xian, Huangshengguan, 3500 m, 3 June 1983, Plant Team 30389 (CDBI); Songpan Xian, Huangshengguan, 3400–3600 m, 1 October 1983, W.Z.Zeng & F.D.Pu 027, 017, 064 (CDBI); Songpan Xian, Huangshengguan, 3400 m, 2 August 1984, J.He & F.D.Pu 150 (CDBI); Songpan Xian, Huangshengguan 3400 m, 4 September 1988, F.D.Pu & L.P.Wang 1397 (CDBI); Songpan Xian, Huangshengguan 3400 m, 18 September 2015, X.L.Guo GXL15091801 (SZ); Songpan Xian, Huanglongsi, 3450 m, 2 August 1984, Y.L.Cao 135 (SZ); Songpan Xian, Kakagou, 3400 m, 31 July 2002, X.M.Gao M116 (HX). Songpan Xian, Dawan, 21 October 1987, Z.H.Pan 87017 (NAS); Zoigê Xian, Nenwa, 3340 m, 1 July 1975, Sichuan Plant Research Team 10235 (NAS); Zoigê Xian, Lake Flower, 3400 m, 20 September 2015, X.L.Guo GXL15092001 (SZ); Hongyuan Xian, Shuajingsi, 3200 m, 8 August 1957, Z.Y.Zhang & H.F.Zhou 23557 (SZ); Hongyuan Xian, Shuajingsi, 3300 m, 13 September 2016, X.L.Guo GXL16091301 (SZ); Hongyuan Xian, Anqu, 3700 m, 20 June 1980, C.R.Xie 75 (SZ); Xiaojin Xian, Mt. Maobi, 4300 m, 4 September 1975, Sichuan Plant Team 9856 (CDBI); Jinchuan Xian, Mt. Kasakongka, 4700 m, 28 June 1958, Q.Li 77948 (PE); Jinchuan Xian, Guanyinqiao, 3600 m, Anynomous 433 (SM). Gansu: Zhouqu Xian, Heiyuhou, 3600 m, 19 July 1987, Z.B.Wang 14458 (NWAFU); Hezuo Xian, Zuogaiduoma, 3600 m, 8 August 2016, X.L.Guo & H.X.Yu GXL16080801 (SZ); Qinghai: Baima Xian: Qingshuihe, 3425 m, 18 July 2016, X. L.Guo, H.X.Yu & D.F.Xie GXL1671801 (SZ).

Figures

FIGURE 3. Geographic distribution of Chamaesium in China.

FIGURE 7. Chamaesium thalictrifolium. A. cross section of mericarp; B. segments of basal leaf; C. habit; D. fruiting umbel with bracts; E. dorsal view of mericarp. [A, B, D and E from GXL1509180101; C from GXL1509180102].