Elymus tianschanigenus Czrep., Sosud. Rast. SSSR

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

8. Elymus tianschanigenus Czrep., Sosud. Rast. SSSR : 351 (1981). Typonym: Agropyron tianschanicum Drobow.

≡ Agropyron tianschanicum Drobow in A. I. Vvedensky & al., Key Fl. Tashkent 1: 40 (1923). ≡ Roegneria tianschanica (Drobow) Nevski in Trudy Sredne-Aziatsk. Gosud. Univ., Ser. 8 b, Bot. 17: 17 (1934). ≡ Semeiostachys tianschanica (Drobow) Drobow in Fl. Uzbekistan. 1: 284 (1941). ≡ E. uralensis subsp. tianschanicus (Drobow) Tzvelev in Novosti Sist. Vyssh. Rast. 10: 22 (1973).

Lectotype

(designated by Tzvelev 1976: 116). Uzbekistan • Western Tian Shan. Tashkent District, Khumsan, Haudale Mountains , 14 VIII 1920, No. 1254, M. Popov [ TASH 0000162 !].

Description.

Stems 50–100 cm, glabrous, smooth. Leaves flat, linear, abaxially rough, glabrous or sparsely hairy. Sheath glabrous, smooth. Ligule to 1 mm. Spikes erect, rarely slightly drooping. Spikelets solitary along axis of spikes. Glumes broadly lanceolate, abruptly acute, rough. Lemma adaxially hairy on most of surface; awn straight or often slightly twisted, to 15 mm. Palea nearly equal to lemma, slightly notched, with ciliate keels. Anthers to 3 mm (Fig. 10 ).

Phenology.

Flowering and fruiting: July-August.

Habitat.

Among shrubs (polydominant, mesophytic deciduous), meadows (floodplain, mesophytic), petrophytic associations (rock scree, gravel scree), in lawns, pebble beds, rocky slopes, forest clearings, among shrubs; in middle and upper mountain belts, 900–3000 m.

General distribution.

Russia, China (Kashgar), Mongolia, Middle Asia (Tarbagatai, Dzungarian Alatau, Tian Shan, Pamir-Alay: Hissar, Darvaz, and Pamir Ranges); Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Uzbekistan.

Distribution in Uzbekistan.

Jizzakh, Namangan, and Tashkent regions (Fig. 3 J ). I- 1 Western Tian Shan district. I- 1 - a Ugam-Pskem region. UGAM RANGE (Bostandyk. On the rocks along the ridge of the Ugam Mountain range in the upper reaches of the Navali-say gorge, 2800 m, 31. 07. 1953, Pavlov 466 [MW 0808858]); PSKEM RANGE (Pskem River basin. Middle course of the Ikhnach-say rivers, 31. 07. 1941, Momotov 171 [TASH 047495!]; Tashkent region, Bostandyk district. Upper reaches of the Pskem, Tyuytash-say, 1955, Karpeshko s. n. [TASH 044516!]; Middle part of the Pskem River valley. Western slope on the right bank of the Ispay-say, 21. 07. 1956, Tsukervanik 1249 [TASH 043752!]; Barkraksay, h = 2300 m, 14. 08. 2002, Maltsev s. n. [TASH 060361!]); MAYDANTAL RANGE (Bostandyk district. Valley of the Oygaing River (right bank), 6–7 km above the Beshstor gorge. On a stony slope, 1700 m, 18. 07. 1958, Pavlov 44 [MW 0808857]; 18. 08. 1958, Pavlov 44 [MW 0808856]). I- 1 - b Western Chatkal region. CHATKAL RANGE (Tian-schan occidentalis. Chatkal Mountain Forest Reserve. Maydantal section. Tashkentsay, h = 1500–1700 m. Southern slope, 10.10., Savich s. n. [TASH 043754!]; Tashkent Alatau Mountains. Basin of the Nurekata River, Almalyk-say, 30. 07. 1953, Maylun, Nabiev, Tsukervanik 1000 [TASH 043726!]; I- 1 - d Kurama region. KURAMA RANGE (Upper reaches of the Angren River. Angren Plateau. Southern slopes. Upper part of Karasay. Dry slopes, 21. 08. 1939, Kudryashev 1331 [TASH 047503!]); CHATKAL RANGE (Tashkent Alatau. Parkent district. Mountain Takali. Rocky-gravel slope, 12. 08. 1953, Butkov, Tsukervanik 1224 [TASH 047494!]); I- 1 - e Chorkesar region. KURAMA RANGE (Foothills of the Fergana Range. Around the village of Gava, 09. 07. 1928, Kryltsova 509 [TASH 043779!]). I- 5 Kuhistan district. I- 5 - a North Turkestan region. TURKESTAN RANGE (Pamir-Alay. Basin of the Zaamin-su River. Valley of the Tuyatashsay River, 18. 07. 1935, Zakrzhevsky 963 [TASH 047499!], 970 [TASH 055321!]; Reserve “ Guralash, ” Kul-Say, 2400 m, 15. 07. 1940, Kultiassov s. n. [MW 0808851]; Guralash Reserve. Tuyatash-say, 14. 06. 1947, Nazarenko 253 [TASH 047500!]; Kul-Say. Juniper forest. Northern slope, 2300 m, 07. 09. 1954, Obongetskaya 212 [TASH 047497!]; Kul-Say. Southern slope, 2300 m, 09. 09. 1954, Obongetskaya 214 [TASH 047498!]).

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 10. Elymus tianschanigenus a spike b spikelet c glumes d lemmas and paleas e stem f node g ligule (https://doi.org/10.13140/RG.2.2.31754.07360).