Dysphania bhutanica Sukhor., Willdenowia 42(2): 171 (2012)

Sukhorukov, Alexander P., Liu, Pei-Liang & Kushunina, Maria, 2019, Taxonomic revision of Chenopodiaceae in Himalaya and Tibet, PhytoKeys 116, pp. 1-141 : 56-57

3. Dysphania bhutanica Sukhor., Willdenowia 42(2): 171 (2012)

Holotype.

BHUTAN, Thimphu distr., Lango, near Paro, frequent weed in apple and other crops, 2300 m a.s.l., 29 Jun 1992, C. Parker 7263 (E00051983! image available at http://data.rbge.org.uk/herb/E00051983).

Description.

Annual up to 100 cm. Stem covered with short simple hairs and subsessile, orange or yellow glands. Leaves pinnatisect, 2.0-9.0 × 1.0-2.5 cm, long-petiolate; their segments oblong or lanceolate, sinuate to lobed, usually densely covered with short simple hairs intermixed with scattered glands. Inflorescence up to 20 cm long, leafy at least in basal and middle parts with scattered curved simple (up to 0.2 mm) hairs and subsessile glands. Perianth segments 5, almost free, 0.7-0.9 × 0.35-0.40 mm; their dorsal part with stout simple hairs (up to 0.08 mm) and orange (rarely yellow) glands (Fig. 20E ). Fruit 0.6-0.7 × 0.5 mm in diameter, subspherical, pericarp minutely papillate (Fig. 20F ). Seed blackish, keeled; embryo horizontal.

Habitat.

Grassy hill slopes and disturbed areas; 2200-3800 m a.s.l.

Phenology.

Flowering: June-August; fruiting: July-September.

Distribution.

See Fig. 22 .

Specimens examined.

BHUTAN: [Thimphu Distr.] Thimphu, 8000 ft a.s.l., 9 Aug 1914, R.E. Cooper 3370 (BM, E00151685); Thimphu, 2408 m a.s.l., 10 Aug 1971, R. Bedi 657 (K); Thimphu Chu, below Taba, 27°30'N, 89°38'E, 2300 m a.s.l., 22 Jul 1979, A.J.C. Grierson & D.G. Long 2828 (E00151632, K); Thimphu Distr., Chapcha, 2200-2400 m a.s.l., 1 Jul 1992, C. Parker 7270 & 7271 (E00051982, E00051981);

CHINA: Xizang: Xigazê Prefecture: Gyangtse, 1904, H.J. Walton s.n. (CAL, P04992918); Lhasa City: Lhasa, 3800 m a.s.l., 16 Aug 1965, Zhang & Lang 1532 (PE00510965); Lhasa, 29°41'N, 91°08'E, 3800 m a.s.l., 13 Aug 1997, G. & S. Miehe & al. 97-013-10 (herb. Miehe); Shannan Prefecture: Gyaca (Jiacha) County, 3300 m a.s.l., 2 Sep 1972, Tibet Chinese Herbal Medicine Survey Team 4572 (PE00511073); [ Nêdong (Naidong) County] Zêtang (Zedang), 11 Aug 1977, B.Z.Guo et al. 22359 (KUN0587209); Nêdong (Naidong) County, Luoqiong vill., 29°15'57.23"N, 91°49'1.76"E, 3569 m a.s.l., 2 Sep 2012, FLPH Tibet Expedition 12-0610 (PE); Nyingchi Prefecture: Tsangpo valley, 10000-11000 ft a.s.l., 5 Sep 1935, F. Kingdon-Ward 12308a (BM); Tsangpo valley, Tse, 9800 ft a.s.l., 31 May 1938, F. Ludlow, G. Sherriff & G. Taylor 4585 (BM); Zhamo (Bomi) County, 2700 m a.s.l., 16 Jul 1965, Zhang & Lang 312 (PE00511002); Mainling (Milin) County, Pai [Pa] town, 3000-3100 m a.s.l., 12 Sep 1974, Qinghai-Tibet Team 74-4663 (PE00511046, PE00511047); Nang (Lang) County, 3100 m a.s.l., 4 Aug 1982, Ni, Ciduo & Cidan 2744 (PE00511029); Mainling County, Qabnag (Qiangna), 22 Aug 1982, Ni, Ciduo & Cidan 3109 (PE00511027);

NEPAL: Western: Dhaulagiri Zone: [Mustang Distr., Kali Gandaki river valley] Tukuche, 10500 ft a.s.l., 21 Aug 1954, J. Stainton, W.R. Sykes & L.H.J. Williams 7356 (BM). The plant has yellow glands only and identification is based on the pinnatisect leaf shape.

General distribution.

E Himalaya and S Tibet.

Figures

Figure 20. SEM micrographs: A perianth of Dysphania ambrosioides B pericarp of Dysphania ambrosioides C perianth of D. himalaica D pericarp of D. himalaica E perianth of D. bhutanica F pericarp of D. bhutanica G perianth of D. kitiae H pericarp of D. kitiae. Magnification: 150 x (A), 250 x (C, E, G), 500 x (B, D, F, H).

Figure 22. Distribution map of Dysphania bhutanica (circles) and D. kitiae (stars).