Elymus tschimganicus (Drobow) Tzvelev

Alieva, Kumush B., Peng, Yilong, Usupbaev, Adilet, Tojibaev, Komiljon Sh., Yusupov, Ziyoviddin, Ergashov, Ibrokhimjon, Azimova, Dilnoza & Jiang, Zhilin, 2025, Synopsis of the genus Elymus (Poaceae) in Uzbekistan (Middle Asia) with a description of Elymus uzbekistanicus a new species from Turkestan Mts, PhytoKeys 257, pp. 9-50 : 9-50

10. Elymus tschimganicus (Drobow) Tzvelev in Trudy Bot. Inst. Komarova Akad. Nauk SSSR, Rast. Tsentral. Azii 4: 221 (sub « E. czimganicus ») (1968), orth. var.

≡ Agropyron czimganicum Drobow in M. G. Popov (ed.), Key Pl. Envir. Tashkent: 40 (1923). ≡ Roegneria czimganica (Drobow) Nevski in V. L. Komarov (ed.), Fl. URSS 2: 604 (1934).

Type.

(lectotype designated by Drobow 1925: 41). Uzbekistan • Prov. Syr-darja. Distr. Taschkent. In montibus ca. urb. Taschkent . Popov, 1921, no. 1266 et 1270 [ TASH 000146 and TASH 000147 ] ).

Description.

Stems 30–70 cm, glabrous, smooth. Leaves 1.2–4 mm wide, flat or longitudinally folded, bluish green, glabrous or slightly hairy adaxially. Sheaths glabrous, smooth, lowest sheaths hairy. Ligule nearly inconspicuous. Spikes drooping. Spikelets solitary along axis of spike. Internodes of spikelet more or less short. Glumes awnless, but sometimes with mucro to 0.8 mm. Awn of lemma geniculate, bent outward, to 30 mm. Palea linear, nearly equal to lemma, apex slightly notched or obtuse. Anthers 2–2.5 mm (Fig. 12 ). 2 n = 28 ( Tzvelev 1976).

Phenology.

Flowering and fruiting in June-July.

Habitat.

In foothills, middle-subalpine and alpine mountain belts, in petrophytic communities (rocky screes, gravelly screes, rocky-gravelly screes, cliffs), meadows (floodplains, mesophytic), and gravel, 500–3400 m.

General distribution.

China (Kashgar), western Himalaya, Middle Asia (Tarbagatai, Dzungarian Alatau, Tian Shan, Pamir-Alay: Alay, Gissar ranges; Darvaz): Kazakhstan, Kyrgyzstan, Tajikistan, Uzbekistan.

Distribution in Uzbekistan.

Jizzakh, Kashkadarya, Namangan, Samarkand, Tashkent, and Fergana regions (Fig. 3 I ). I- 1 Western Tian Shan district. I- 1 - a Ugam-Pskem region. UGAM RANGE (Tashkent district, Khumsan, Haudale mountains, 14. 08. 1920, Popov 1266 [TASH 0000146!], 1270 [TASH 0000147!]); PSKEM RANGE (Bostandyk district. Upper reaches of the Barkrak-say gorge. Southern rocky slope near the GRP base, 3300 m, 08. 08. 1959, Pavlov 19 [MW 0808515]; Upper reaches of the Barkrak-say gorge. On the rocky southern slope near the cliffs along the right bank of the gorge near the end of the glacier, 3400 m, 11. 08. 1959, Pavlov 116 [MW 0808517]); I- 1 - c Arashan region. CHATKAL RANGE (Angren, surroundings of the Arаshan peak, 29. 07. 1938, Zakirov 26 [SAMDU]); I- 1 - d Kurama region. KURAMA RANGE (Angren River, 1937, Zokirov s. n. [SAMDU]). I- 3 Fergana-Alay district. 1-3 - b Eastern-Alay region. ALAY RANGE (Skobelevsky district. Northern slope of the Alay Range. Basin of the Shakhimardan River. Upper reaches of the Archa-bashi River. Granite scree near vegetation, 31. 07. 1915, Drobow 342 [TASH 047390], 6076 [US 2530891]). I- 5 Kuhistan district. I- 5 - a North Turkestan region. TURKESTAN RANGE (Northern slopes of the Turkestan Range, upper reaches of the Sanzar River. Guralash-Say Nature Reserve. On the road, at the Guralash Pass. Altitude 2900 m, 08. 09. 1938, Korotkova 278 [TASH 040990, TASH 040991, TASH 040992]; At the summit of the watershed between Kulsay and Guralash, 14. 07. 1938, Korotkova 256 [TASH 041000, TASH 041001]). I- 6 Western Hissar district. I- 6 - a Kashkadarya region. HISSAR RANGE (Western Pamir-Alay. Upper reaches of the Yakkabag-Darya River. Near the village of Tash-Kurgan, 16. 07. 1936, Butkov, Bochantsev 982 [TASH 040994]; Outcrops of variegated rocks to the west of the village of Tash-Kurgan. Among the cliffs, 30. 06. 1936, Butkov, Bochantsev 513 [TASH 040997, TASH 040998]); I- 6 - b Tarkapchigay region. HISSAR RANGE (Pamir-Alay. Variegated foothills to the southeast of the city of Guzar. Shale screes along the slope of Mountain Kara-San, 09. 09. 1935, Lepeshkin 9 [TASH 040999]).

Figures

Figure 3. Distribution maps of Elymus species in Uzbekistan A E. caninus B E. lachnophyllus C E. fedtschenkoi D E. longearistatus E E. macrochaetus F E. nevskii G E. praeruptus H E. transhyrcanus I E. tschimganicus J E. tianschanigenus.

Figure 12. Elymus tschimganicus a spike b spikelet c glumes d lemmas and paleas e stem f node g ligule (https://doi.org/10.13140/RG.2.2.25043.18724)