Astragalus teshigicus D. Munkhtulga & S. Baasanmunkh 2025, sp. nov.
Creators: name: Munkhtulga, Dariganga
name: Baasanmunkh, Shukherdorj
name: Nyamgerel, Nudkhuu
name: Park, Jong Ho
name: Tsegmed, Zagarjav
name: Tojibaev, Komiljon Sh.
name: Choi, Hyeok Jae
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Fabales
Fabaceae
Astragalus
Astragalus teshigicus

description: Astragalus teshigicus D. Munkhtulga & S. Baasanmunkh sp. nov.
Fig. 5
Type.
Mongolia. Bulgan province, Teshig soum, Baga Baysgalan, 49.9679, 102.5867, 1128 m, 05 June 2018, B. Oyuntsetseg & Sh. Baasanmunkh NW 11 [Holotype UBU 0002138! (Fig. 6 B), Isotype UBU 0002139!].
Diagnosis.
The morphological features of A. teshigicus are similar to that of A. laguroides but differ by its raceme oblong or oblong-cylindrical (vs. ovoid), calyx rather densely covered with spreading, straight only white hairs 2 mm (vs. densely covered with asymmetrically bifurcate to basifixed, tangled, spreading white hairs 1–2 mm, at outer side of the teeth and sometimes at the nerves of the tube also with black hairs), leaves 8–18 cm (vs. 3–14 cm long), leaflets in 4–6 pairs, elliptical, 14–20 × 5–8 mm (vs. 3–5 pairs, narrowly elliptic, 8–25 × 3–6 mm) (Table 2).
Description.
Plants perennial, 8-20 cm tall, acaulescent. Stems up to 1 cm, densely appressed white hairy. Stipules 4-5 mm long, broadly triangular-acuminate, densely covered with spreading or ascending hairs. Leaves 8-18 cm; petiole 3-7 cm, like the rachis covered with appressed white hairs. Leaflets in 4-6 pairs, elliptical, 14-20 × 5-8 mm, on both sides densely covered with medifixed, subappressed hairs, acute to rarely obtuse. Peduncles 6-12 cm, with medifixed, appressed hairs. Racemes oblong or oblong-cylindrical (3.5) 4-7 (8) cm long, rather densely many-flowered. Bracts scarious, 5.5-6 mm, narrowly triangular, sparsely covered with ascending only white hairs, at the margins covered with spreading white hairs up to 1.5-2 mm. Calyx 12-15 mm, at the beginning of anthesis tubular, soon ovoid-inflated, densely covered with basifixed, ± spreading, rigid white hairs 1.5-2 mm; teeth subulate, 2-3 mm. Petals purplish. Standard 20-24 mm; blade 4.5-5.5 mm wide, obovate, slightly constricted in the middle, slightly emarginate, at the base gradually narrowed. Wings 17-22 mm; blades oblong, rounded, 5-5.5 × 2-3 mm; auricle c. 1 mm; claw 8-9 mm. Keel 14-18 mm; blades 4-4.5 × 2-3 mm; claw c. 8 mm. Ovary sessile. Legumes enclosed in the calyx, oblong, 4-5.5 × 2-2.5 mm, with a hooked beak c. 1 mm, unilocular; densely covered with spreading white hairs.
Distribution.
Endemic to Mongolia. This species is found only in a single location in the northern part of the country (Fig. 9).
Habitat.
This species grows in steppe areas including mountain slopes, rocky and stony mountains.
Etymology.
The species epithet refers to the location where the species was collected.
description: Published as part of Munkhtulga, Dariganga, Baasanmunkh, Shukherdorj, Nyamgerel, Nudkhuu, Park, Jong Ho, Tsegmed, Zagarjav, Tojibaev, Komiljon Sh. & Choi, Hyeok Jae, 2025, Morphological and phylogenetic analysis approach to three new species and a new section of Astragalus (Fabaceae) from Mongolia, pp. 51-73 in PhytoKeys 255 on pages 51-73, DOI: 10.3897/phytokeys.255.140805