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Zenodo
2025
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| Liŋkkat: | https://doi.org/10.5281/zenodo.15183921 |
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Sisdoallologahallan:
- <p><i>Astragalus uvsicus</i> D. Munkhtulga, S. Baasanmunkh & H. J. Choi sp. nov.</p><p>Fig. 7</p><p><b>Diagnosis.</b></p><p><i>Astragalus uvsicus</i> is morphologically similar to <i>A. beitashanensis</i> W. Chai & P. Yan (Zhai and Yan 2010) and <i>A. laguroides</i>, but can be distinguished by its leaflet 2–5 pairs, narrowly elliptic, acute 8–11 (– 14) × 3–5 mm (<i>A. beitashanensis</i>, vs. 3–5 pairs, elliptic to suborbicular, obtuse, 4–9 × 3–6 mm; vs. <i>A. laguroides</i>, 3–5 pairs, narrowly elliptic, acute 8–25 × 3–6 mm) Legumes linear, 5–6 × 2–3 mm, with a beak c. 1 mm, bilocular, loosely covered with spreading, straight hairs (<i>A. beitashanensis</i>, legumes oblong, c. 8 mm, unilocular, very densely covered with spreading, basifixed hairs; <i>A. laguroides</i>, legumes oblong, (6) 7–8 × 2–3 mm long, with a hooked beak c. 1 mm, unilocular; covered with subappressed to spreading hairs). At the section level, the <i>Uvsicus</i> section is differentiated by its plants covered with medifixed hairs (vs. covered with semi-appressed pilose in <i>Mixiotricha</i>), peduncle not longer than leaves, raceme many-flowered (vs. peduncle very short, raceme few-flowered in <i>Trachycercis</i> and <i>Mixiotricha</i>), legumes enclosed in the calyx (vs. calyx ruptured by legumes in <i>Macrotrichoides</i>), and bilocular (vs. unilocular in <i>Laguropsis</i>) (Table 3). The general habits of selected sections within the subgenus <i>Cercidothrix</i> are shown in Fig. 8.</p><p><b>Type.</b></p><p>Mongolia. Depression of Great Lakes: • Uvs province, Malchin soum, Khuiten valley, 49°29'36.2"N, 93°10'18.5"E, 1550 m, 30 May 2024, <i>B. Oyuntsetseg, G. Bayarmaa, & D. Munkhtulga</i> [Holotype UBU 0039100! (Fig. 6 A)] • Uvs province, Malchin soum, Surtiin zuslan, 49°37'0.6"N, 93°3'46.6"E, 1611 m, 10 June 2021, <i>D. Munkhtulga</i> [Isotype UBU 0027685!].</p><p><b>Description.</b></p><p>Plants perennial, 5-12 cm tall, acaulescens or nearly so, covered with medifixed hairs. Rootstock with a pluricipital root-crown. Stipules narrowly triangular-acuminate, 5-7 mm, shortly adnate to the petiole, otherwise free from each other, covered with strongly asymmetrically bifurcate, subappressed white hairs up to 2 mm. Leaves 3-8 (12) cm; petiole 2-3 cm, like the rachis covered with medifixed, appressed hairs. Leaflets in 2-5 pairs, narrowly elliptic, 8-12 × 3-5 mm, apex acute, rather densely covered with medifixed, appressed hairs c. 1 mm. Peduncles 2-6 cm, with medifixed, appressed hairs. Racemes globose or ovate 3-4 cm long. Bracts scarious, 2-3 mm, narrowly triangular, white and few black hairy. Calyx at beginning of anthesis tubular, later on ovoid-inflated, 11-14 mm, with distinct, elevated longitudinal nerves, loosely covered with subbasifixed, spreading white and black hairs 1-2 mm; teeth subulate, 2-3 mm. Petals violet. Standard 15-18 mm; blade 3-4 mm wide, obovate, slightly constricted in the middle, emarginate, at the base gradually narrowed into the rather long claw. Wings 13-15 mm; blades narrowly oblong, obtuse, 5.5-6.5 × 1.1-2 mm; auricle c. 1 mm; claw 7.5-8.5 mm. Keel 12-14 mm; blades 4-5 × 3 mm. Ovary sessile. Legumes enclosed in the calyx, linear, c. 5-6 × 2-3 mm, with a beak c. 1 mm, bilocular, loosely covered with spreading, straight white hairs c. 1 mm, smaller black hairs amount greater than the apex.</p><p><b>Distribution.</b></p><p>Endemic to Mongolia. This species is found in the Khyargas and Uvs lakes in the depression of great lakes region in Mongolia (Fig. 9).</p><p><b>Habitat.</b></p><p>This species grows in stony mountain slopes and near rocks, sayr slopes.</p><p><b>Etymology.</b></p><p>The species epithet refers to the location where the species was collected.</p><p><b>Additional specimens examined.</b></p><p>Mongolia. Depression of Great Lakes: • Uvs province, Tarialan soum, Turgen river, 49°56'10.9"N, 92°15'22.7"E, 900 m, 31 August 1984, <i>I. A. Gubanov 9338</i> (MW 0183285).</p>