Elymus macrochaetus (Nevski) 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

5. Elymus macrochaetus (Nevski) Tzvelev in Novosti Sist. Vyssh. Rast. 9: 61 (1972)

≡ Agropyron macrochaetum (Nevski) Bondarenko in Opred. Rast. Sred. Azii 1: 170 (1968). ≡ Roegneria macrochaeta Nevski in V. L. Komarov (ed.), Fl. URSS 2: 612 (1934). ≡ Semeiostachys macrochaeta (Nevski) Drobow in Fl. Uzbekistan. 1: 281 (1941).

Type.

Tajikistan • Tadshikistania orientalis. Systema fl. Jach-su; ad fl. Obi-Daschtako superiorem prope pagum Schugnau (in montibus Chasretischa), 27 September 1932, N. Goncharov, G. Grigorjev, N. V. Nikitin 985 [ K 000674857 ] .

Description.

Stems numerous, 80–120 cm, densely short hairy below nodes. Leaves 3–9 mm wide, adaxial surface densely hairy. Sheaths rough. Ligule truncate, to 1 mm. Spikes erect, rarely slightly drooping. Spikelets solitary along axis of spikes. Internodes of spike axis rough along two lateral ridges. Glumes 10–20 mm, almost equal, narrowly lanceolate, apex narrowly acute, with awn to 3 mm. Lemma abaxially with spines or hairs across entire surface, with awn 15–30 mm, awn straight or often slightly curved. Palea lanceolate, elongate, margins short ciliate. Anthers 3–4.5 mm (Fig. 7 ).

Phenology.

Flowering and fruiting: July-August.

Habitat.

Among shrubs, in sparse forests, in open forest clearings, gravel beds and rocky slopes in middle and upper mountain belts, 800–3400 m.

General distribution.

Middle Asia (Tian Shan (indicated for the Talas Alatau), Pamir-Alay: Hissar, Darvaz, and Western Pamir ranges): Kyrgyzstan, Tajikistan, and Uzbekistan ( Alieva et al. 2024 b).

Distribution in Uzbekistan.

Kashkadarya and Surkhandarya regions (Fig. 3 E ). I- 6 Western Hissar district. I- 6 - a Kashkadarya region. HISSAR RANGE (South-western Hissar, Hissar State Nature Reserve, Tankhozdarya branch, Osmantalash ridge, 02. 07. 2021, Aromov. Southwestern Hissar, Hissar State Reserve, Gilon department, Novshur say, 14. 07. 2022, Aromov; Kyzylsuv department, big Khursanddara say, 30. 07. 2022, Aromov s. n. [Herbarium of the Hissar State Nature Reserve.]); Southwestern Hissar, Hissar State Reserve, Tankhozdarya department, Kuralai say, 30. 07. 2022, Aromov s. n. [Herbarium of the Hissar State Nature Reserve.]). I- 6 - c Baysun region. (Mountains of Khodja-gurgur ata. Basin of the Khodja-ipak say River, Kyzyl-su, 29. 07. 1934, Penkaovich 148 [TASH 046154!]. I- 7 Hissar-Darvaz district. I- 7 - a Sangardak-Tupalang region. HISSAR RANGE (Sary-Asiya district. Descent from Dzhaukoz pass, 04. 08. 1931, Merkulevich s. n. [TASH 046155!, TASH 046156!]; Pamir-Alay. 3 km east of the village Khovat, altitude 2200 m, at the upper boundary of the deciduous forest. Description 51., 02. 08. 1941, Gromakov 634 [TASH 046157!]).

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 7. Elymus macrochaetus a spike b spikelet c glumes d lemmas and paleas e stem f node g ligule (https://doi.org/10.13140/RG.2.2.32592.93445).