8. Physospermopsis nana (A.R.Franchet) M.G.Pimenov et E.V.Kljuykov, 2000c: 538

Pleurospermum nanum = Pleurospermum nanum A.R.Franchet, 1894: 140. Type: CHINA. Yunnan: Dali County, Mt. Cang, 25 Sep 1884, Delavay 197 (syntypes: P [P00834544, P00834545]).

Type.

China. Yunnan: Mt. Cang, 4000 m, 30 Aug 1889, Delavay 4066 (lectotype, designated by Pimenov and Kljuykov 2000c, pg. 538: P [P00834546]; isolectotype, designated by Pimenov and Kljuykov 2000c, pg. 538: P [P00834547]) .

Diagnostic characters.

Physospermopsis nana usually possesses reduced stem, membranous-margined sheaths, and leaf-like bracts. The bracteoles are pale green with whitish margin in lower half. The ultimate segments are linear-lanceolate. The characters mentioned above are sufficient to distinguish it from other Physospermopsis species.

Distribution.

Endemic to China, Sichuan, Tibet, Yunnan. (Fig. 4).

Habitat.

Physospermopsis nana usually grows on marshy meadows, under shrubs.

Additional specimens examined.

China. Sichuan Province: Yajiang County, 3800 m, 9 Aug 1979, Yajiangdui 293 (SM); Muli County, Sanqu, 3600 m, 13 Sep 1983, Qinghai-Tibet Expedition 14043 (KUN) ; Tibet Province: Cona County, 4561 m, 10 Aug 2015, L.Wei & J.C.Hao 15544 (BNU); Lahsa County, 5200 m, 3 Sep 1965, G.C.Xia & T.K.Mi 2610 (KUN); Ge'gyai County , 5200 m, 21 Aug 1976, Qinghai-Tibet Expedition 8710 (KUN); Lahsa County, 6000 m, 1 Sep 1965, Y.T.Zhang & K.Y.Lang 2412 (KUN); Ge'gyai County , 5185 m, 9 Sep 2017, Y.He BNU2017XZ325 (BNU); Shigatse, 4645 m, 23 Aug 2017, Y.He & D.H.Liu BNU2017XZ064 (BNU); Gar County, 4360 m, 31 Aug 2008, J.H.Chen et al YangYP-Q-0122 (KUN) . Yunnan Province: Lanping County, 4200 m, 18 Oct 2019, X.L.Guo G19101802 (SZ); Lijiang County, Mt. Yulong, 4400 m, 18 Aug 1976, Y.Q.He 049 (WUK); Deqen County , Baima snow range, 4400 m, 14 Jul 1981, Qinghai-Tibet Expedition 2774 (HITBC); Gongshan County, Mt. Nanwan, 3400 m, 22 Sep 1997, 9604 (KUN); Zhongdian County, 4190 m, 2 Oct 2005, Z.D.Fang et al PL-130 (SABG); Lijiang County, Yuhu, 4000 m, 8 Sep 1955, G.M.Feng 21475 (KUN); Lijiang County, 4100 m, 31 Aug 1963, C.Z.Bao 20229 (KUN); Zhongdian County, 4200 m, 2 Aug 1986, H.Sun & Z.G.Qian 991 (KUN); Lijiang County, snow range, 15 Sep 1940, R.C.Qin 31043 (KUN); Zhongdian County, Mt. Haba, 4000 m, 31 Aug 1962, Zhongdian Expedition 1687 (KUN); Zhongdian County, Haba snow range, 26 Aug 1939, G.M.Feng 2215 (KUN); Lijiang County, Yulong, 4000 m, 31 Aug 1963, C.Z.Bao 20226 (KUN); Lijiang County, 2600 m, 27 Jul 1937, D.J.Yu 15374 (KUN); Lijiang County, Mt. Yulong, 3200 m, 26 Aug 1961, R.L.Xiong & Y.F.Qi 612715 (KUN); Dali County, 20 Aug 1945, H.C.Wang 4507 (KUN); unknown locality, 1963, J.S.Yang 2374 (KUN); Zhongdian County, 3400 m, 28 Jun 2009, Z.D.Fang G-297 (SABG); Dali County, Mt. Cang, 3460 m, 15 Oct 1990, CLD-90 (PE) .