taxonID	type	description	language	source
03E2D130FFC1FFCFC9F0C50CFD16DCE0.taxon	discussion	Atraphaxis kuvaevii, a local endemic of Tuva, forms a separate subclade in both plastid and ITS trees and does not show introgression with other species (Figs 1 and 3). It is a dwarf schrub 10 – 25 cm in height, with divaricately branched second-year shoots and annual generative and vegetative shoots 2 – 5 cm long (Fig. 4, Table 1). Leaves are small, rhomboid (Fig. 5 A). Generative shoots terminate with thyrses with 3 – 5 cymes of 1 – 2 flowers. The perianth is small, with a tube articulated to a pedicel in ochreola (Fig. 5 B, C). The epidermal cells covering the perianth tube and the tepals do not differ from those of A. pungens and A. ledebourii (Fig. 6 A – F). Fruits are smooth and glossy, light brown, with three styles terminated with globular stigmas (Fig. 5 D – F, Fig. 6 G – I).	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFC1FFCFC9F0C50CFD16DCE0.taxon	description	Atraphaxis kuvaevii has tricolporate pollen grains 27.4 – 27.7 × 14.5 – 15.9 µm with striate-perforate sporoderm ornamentation: it has short grooves and 2 – 3 perforations in a row (Fig. 7 A – B), while the pollen surface of A. pungens (Fig. 7 C) and A. decipiens (Fig. 7 D – E) has distinct striae and long grooves with 5 – 6 perforations in a row.	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFC1FFCFC9F0C50CFD16DCE0.taxon	diagnosis	Atraphaxis kuvaevii clearly differs from other species of Atraphaxis with the smallest leaf blades, perianth, and the tepals cuneate at the base, the filiform perianth tube articulated to the pedicel in ochreolae, and the smallest fruits (Table 1). Atraphaxis kuvaevii was previously mistaken for A. laetevirens distributed in Kazakhstan, Altai and Dzhungaria. Both species have small glands at the edges and on the lower surface of leaf blades, and light-brown glossy fruits, but the fruits of A. kuvaevii are equal to the inner tepals, while the fruits of A. laetevirens are 2 – 3 times smaller than the inner tepals of the perianth. Atraphaxis laetevirens falls different subclades in both plastid and ITS trees. Thus, the morphological and molecular data support A. kuvaevii as a distinct species distributed in Tuva and the South of Krasnoyarskii Krai (Fig. 8).	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFC1FFCFC9F0C50CFD16DCE0.taxon	materials_examined	RUSSIA. Krasnoyarskii Krai: the West Sayan, Sayano-Shushensky Nature Reserve, left board of the Sayano-Shushenskii water reservoir, above the Kalbakmys river, stony mountain steppe, 615 m, 3 July 1987, Kuvaev & Sonnikova 1015 - 13 (holotype MW 0061320)	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFC5FFD2C9F0C4EDFB37DDDF.taxon	discussion	A. ledebourii sp. nov. and A. × uyukensis nom. provis. Our current results have shown that “ Atraphaxis pungens s. l. ” combines plants from Southern Siberia and Mongolia with three different plastid haplotypes, which replace each other in the area (Figs 2 and 8). All the plants demonstrate a great similarity in the appearance and morphology of shoots, inflorescences, perianths and fruits, so it is impossible to discriminate them. They are shrubs 15 – 50 cm high (Figs 9 – 11, Table 1) with vigorous vegetative shoots, often sylleptically branching. Second-year shoots become durable, long lasting, perennial axes bear prickly branchlets. The covering of second-year shoots is dark-gray, almost black, the cork peels off, exposing the reddish bark. Wood is pale pinkish. Second-year shoots and their branchlets bear short (5 – 10 cm long) axillary pale-green or creamy annual shoots. These shoots are leafy and some terminate with thyrses. Annual short generative and vegetative shoots bear small oblanceolate or spathulate leaf blades with acute or obtuse apex, gradually narrowed to the base (Fig. 9 A – C; Fig. 10 A, C, D; Fig. 11; Fig. 12 A – B; Fig. 13 A, Fig. 14 D, E). Annual long vegetative shoots bear large obovate, oblongelliptic, broadly elliptic or rhomboid-elliptic leaf blades with acute or mucronate apex (Fig. 9 D – F; Fig. 10 B, E, F; Fig. 12 C; Fig. 13 B; Fig. 14 A). The thyrses are usually compact, frondo-bracteose, consist of 4 – 7 cymes with 2 – 3 flowers. Perianth is yellowish-white or white, sometimes pinkish, with a very long perianth tube articulated to as long as pedicel (Fig. 12 H, I; Fig. 13 C; Fig. 14 B, F). The epidermal cells of tepals and tube are similar (Fig. 6 C – F).	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFC5FFD2C9F0C4EDFB37DDDF.taxon	diagnosis	Atraphaxis pungens has black glossy fruits twice shorter than inner tepals of the perianth (Fig. 12 J – L). Atraphaxis ledebourii has dark-brown to black fruits, 1.5 times shorter of inner tepals (Fig. 13 F, G, I). In plants from Altai and Tuva, the ovary and stamens are often underdeveloped. In both species three styles are fused at the very base (Fig. 6 J, K, Fig. 12 D – G, Fig. 13 D, E, H). In A. pungens and A. × uyukensis, stigmas are either flat and rounded, or elongated and bent out, later bevealed outward (Fig. 12 G, L; Fig. 14 C, G – I). In A. ledebourii from Altai Republic, the stygmas are flat and rounded (Fig. 13 D), in plants from Tuva Basin and Ubsunur Basin the stygmas are globular (Fig. 6 K; Fig. 13 E, H).	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFC5FFD2C9F0C4EDFB37DDDF.taxon	description	Pollen of A. pungens and A. ledebourii is tricolporate, oblong-spheroidal, elliptical in equatorial view, roundedtrilobed in polar view, with distinct, deep, and long colpi (ectoapertures). Atraphaxis pungens from Askiz, Khakassia (255) has syncolporate pollen 29.3 – 32.4 × 20.5 – 24.5 µm, A. ledebourii (sub A. pungens) from Kharalyg-Khem, Tuva (247) has the same pollen size (27.7 (25.8 – 31.8) × 26.3 (24.5 – 27.9) µm (Yurtseva et al. 2014). The pollen surface of A. pungens has striato-perforate ornamentation with distinct, protruding, intensively branching and merging striae and grooves with 2 – 7 pits or perforations in a row (Fig. 7 C). Atraphaxis pungens 304 from Kartushibinskii ridge has spherical pollen grains 30 µm in diameter with abnormal flat ridges and slit-like grooves (not shown).	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFC5FFD2C9F0C4EDFB37DDDF.taxon	diagnosis	Thus, A. pungens and A. ledebourii do not show reliable morphological characteristics which let to clearly distinguish them. Due to high morphological similarity of A. pungens and A. ledebourii, their putative hybrid A. pungens × A. ledebourii (243) from Kaa-Khem village (Tuva, Kyzylskii Raion) does not differ from the parents. This hybrid has larger leaves at vegetative shoots, larger perianths and fruits (Fig. 10 F) The reciprocal hybrid A. ledebourii × A. pungens 318 from Hangay, Mongolia, has black, shiny fruits common for A. pungens.	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFC5FFD2C9F0C4EDFB37DDDF.taxon	discussion	Three specimens of A × uyukensis (241, 301, 311) from Kara-Khaak and the Uyuk ridge, Tuva, combine plastid haplotype U and ITS ribotypes P 2 and P 2 del of A. pungens (303, 316, 317, 319) (Figs 1, 3). The sample (301) from Kara-Khaak, Tuva (Fig. 9 F) resembles other specimens of A. pungens in the appearance, long vegetative shoots, broadly elliptical leaf blades, perianth, and black glossy fruits (Fig. 14 A – C). The samples 241 and 311 (Fig. 11) resemble the samples A. pungens (184, 192, 304) from Kartushibinskii ridge (Fig. 9 A – C) in the appearance, oblongoblanceolate leaf blades of short generative and vegetative shoots, small thyrses, and yellowish perianths (Fig. 14 D – F). Their stygmas are flat, which is a characteristic of A. pungens (compare Fig. 12 D – F and Fig. 14 G – I).	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE9FFE7C9F0C530FDEDDD28.taxon	materials_examined	Type: — RUSSIA. Krasnoyarskii Krai: West Sayan Mountains, Sayano-Shushenski Nature Reserve, left board of the Sayano-Shushenskaya water reservoir, above the Kalbakmys River, stony mountain steppe, 615 m, 3 July 1987, Kuvaev & Sonnikova 1015 - 13 (holotype MW 0061320!, isotype NS!) (Figs 4 – 5, 6 G – I, 7 A – B).	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE9FFE7C9F0C530FDEDDD28.taxon	description	Description (macromorphology): — Dwarf shrub 15 – 20 (30) cm tall with tortuous extensively branched shoots. Second-year shoots 3 – 4 mm in diam, smooth, slightly prickly, covered with dark gray exfoliating bark hiding foxybrown wood. Annual vegetative shoots to 10 – 12 (15) cm long, straight, creamy, finely ribbed, glabrous, 1.0 mm in diam., leafy, with internodes 5 – 6 mm long. Generative shoot 1.5 – 5 cm long, with 3 – 4 leaves spaced by internodes 1 – 2 mm long, terminates with bracteose thyrse 10 – 15 mm long, with 3 – 4 cymes of 1 – 2 (3) flowers. Ochreas at vegetative shoots 3 – 6 mm long, membranous, slightly brownish at base, above semitransparent, silvery-white at margin, split in 2 subulate lacinulas serrate-incised at margin, each with a single faintly visible vein and short middle lacinula serrateincised at margin. Ochreolas in thyrses 2,5 – 3 mm long, semitransparent, cleft in two sharp teeth. Leaf blades dark green, bright green or glaucose, 8 – 11 × 2 – 6 mm at shoots, 3 – 4 × 1 mm in thyrses, elliptical or rhomboid-elliptical, apex rounded or shortly pointed, base cuneate, gradually or suddenly narrowed into a petiole 0.5 – 1.0 mm, thick, leathery, with a clear net of veins, glabrous above, finely crenulate and papillate at margin (Fig. 5 A). Perianth ca. 5 – 6 mm long; filiform part of perianth tube 2.0 – 3.0 mm long, with a funnel-form extention 0.3 – 0.4 (0.5) mm long; the tube is much longer than a pedicel 1.0 mm, or the place of articulation is hidden in ochreola (Fig. 5 B – D). Outer tepals two, 2.0 – 2.5 × 1.5 – 2.0 mm, rhomboid, ovate or rotundate, reflected to a pedicel; inner tepals three, 3.0 – 4.0 × 2.5 – 2.0 mm, flat, base cuneate, apex rotundate, green at the middle, with a wide pinkish margin, slightly undulate, surround the achene, with prominent longitudinal veins or without veins. Stamens 8, filaments subulate-lanceolate, gradually dilated towards the base, anthers rounded-oval. Achene 2.0 – 2.8 × 1.3 – 1.6 mm, equal to inner tepals, trigonous, ovoid, gradually acuminate, light-brown, smooth, glossy, faces ovate- or elliptical-lanceolate, almost flat, ribes obtuse, styles three 0.3 – 0.4 mm long, free from the base, with papillate globular stigmas 0.2 mm (Figs 5 E – F, 6 G – H). Description (pollen): — Oblong-spheroidal, 24.2 – 27.3 × 19.3 – 20.7 µm (P / E = 1.29); tricolporate, elliptical in equatorial view, rounded-trilobed in polar view; colpi are distinct, long and deep; ora distinct, lalongate or circular (Fig. 7 A, B). The sporoderm ornamentation is striate-perforate with the striae 0.10 – 0.20 µm thick, distinct and protruding, mainly short and straight, divided by deep short grooves with 2 – 4 (rarely more) large perforations in a row. Exine is 2.0 (1.7 – 2.4) µm thick.	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE9FFE7C9F0C530FDEDDD28.taxon	etymology	Etymology: — Named after Vladimir B. Kuvaev (1918 — 2009), a researcher of Siberian Flora who first indicated diagnostic characteristics of the taxon.	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE9FFE7C9F0C530FDEDDD28.taxon	biology_ecology	Flowering time: — June – July. Fruiting time: — July – August.	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE9FFE7C9F0C530FDEDDD28.taxon	distribution	Distribution: — RUSSIA. Southern Siberia, Krasnoyarskii Krai: West Sayan Mts, valley of the Yenisey river in Tuvinian Depression, rocky slopes of the Uyuk ridge and the West and East Tannu-Ola ridge facing the Yenisey river, Khayyrakan Mt.	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE9FFE7C9F0C530FDEDDD28.taxon	biology_ecology	Ecology: — Stony mountain steppe, nanophyton steppe, feather grass & selaginella shrubby steppe, granite or limestone rocks and slopes.	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE9FFE7C9F0C530FDEDDD28.taxon	discussion	Note on the holotype: — MW 0061320 was previously identified as: A. pungens (M. Bieb.) Jaub. & Spach (12 March 1988, det. Kuvaev.), A. laetevirens (Ledeb.) Jaub. & Spach (23 March 1988, det. Kuvaev), A. frutescens (L.) K. Koch (23 Mart 1988, det. Lomonosova); A. frutescens (L.) K. Koch (20 April 1988, det. Kuvaev), A. frutescens (L.) K. Koch × A. laetevirens (Ledeb.) Jaub. & Spach (6 March 2015, det. Yurtseva).	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE9FFE7C9F0C530FDEDDD28.taxon	materials_examined	Specimens examined: — RUSSIA. Krasnoyarskii Krai: West Sayan Mts, Sayano-Shushensky Nature Reserve, left board of Sayano-Shushenskaya water reservoir, above the mouth of the creek Taldy-Chas, base of granit slope, 540 m, 3 July 1987, Kuvaev & Sonnikova 1013 - 6 (MW 0061321!); Republic of Tuva [Ulug-Khemskii Raion]: the eastern slope of Mt Khayyrakan, on the main pass of the main saddle, on rocks. 6 July 1946, Schroeter 820 (MW 0061323!); ibidem (MHA!); ibidem, 11 June 1981, Doronkin (NSK); ibidem, vicinity of Khayyrakan village, the steep bank of the Yenisey River, N 51 ° 34 ’ 27.0 ’’, E 93 ° 03 ’ 58.8 ’’, 11 July 2014, Kostikov (NSK!); ibidem, Mt Khayyrakan, stony steppe, 13 July 1974, Timokhina & Egorova 528 (NSK!); West Sayan Mts, the Uyuk ridge, environs of Bayan-Kol vill., southern slope, eastern microslope, feather grass & selaginella shrubby steppe, 7 July 1975, Lomonosova & Grushevskya 2708 (MHA!); ibidem, southern slope, eastern microslope, at rocks, 8 July 1975, Lomonosova & Iskakova 2709 (MHA!); ibidem (NSK!); 10 km E of Shagonar vill., the Shagonar rocks on the left bank of the Yenisey River, limestone rocks on the banks of the Yenisey, 650 m, 51 ° 34 ’ N, 93 ° 04 ’ E, 17 August 2002, Nikitin, Byalt & Sytin 1120 (LE!); valley of the Yenisey river, vicinity of Iiji-Tal settlment, 51 ° 34 ’ 05.9 ” N, 93 ° 23 ’ 16.4 ” E, 19 July 2006, Shmakov et al. K 3 - 2360 (ALTB!); [Biy-Khem kozhuun at the border with the Krasnoyarskii Krai], the right board of the Sayano-Shushenskaya hydropower reservoir, the Sayan canyon at the mouth of the Chamge (Chinge) river, flat surface of the ancient upper terrace of the Yenisey river, nanophyton steppe with Atraphaxis and Spirea hypericifolium dominated, at the upper sides of deep ravines, 540 – 600 m, N 51 ° 42 ’ 39.9 ’’, E 092 ° 17 ’ 46.5 ’’, 17 July 2014, Sonnikova (MW!); [Kyzyl kozhuun] right bank of the Yenisey river 40 km West of Kyzyl, at the rock “ Dzharga ”, in a ravine on the southern gravelly slope, 27 July 1947, Schroeter 281 (MHA!).	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE8FFE5C9F0C600FF37D87B.taxon	materials_examined	Type: — RUSSIA. Tuva: Tes-Khem Raion, the southern slope of the East Tannu-Ola ridge, dry stone bed of the Khyralyg-Khem river, 1200 m, 3 June 1972, Khanminchun 4821 (holotype MW 0061283!, isotypes LE!, MHA!, NSK!) (Fig. 21).	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE8FFE5C9F0C600FF37D87B.taxon	description	Description: — Shrub ca 30 – 50 cm tall. Woody shoots up to 1 cm in diam., inclined-spreading, dark-gray, much branched, bark exfoliating and fibrously disintegrating, naking pinkish or creamy wood. Second-year shoots bear lateral branchlets 5 – 12 cm, 3 – 5 mm in diam. departing at 45 degrees, somewhat spiny after fruiting, but easily break off. Annual shoots 3 – 15 cm long, 0.5 – 1.0 mm in diam., straight, finely ribbed, glabrous, creamy, leafy, with internodes 5.0 – 6.5 mm. Some annual shoots terminate with frondo-bracteose thyrses 1 – 2 cm long with 3 – 8 congested (rarely far spaced) cymes of 2 – 3 flowers. Leaf blades bright-green, later bluish-green or gray, rhomboid-elliptical, broadly elliptical, or obovate, 7 – 12 (30) × 5 – 7 (18) mm, obtuse, shortly pointed, or acuminate, suddenly narrowed to a petiole 1.0 – 1.0 mm, glabrous, with prominent net of veins, with smooth, flat or slightly undulate margin. Leaf ratio 2 – 3. Ochreas 4 – 7 mm long, semitransparent, silvery-whitish, cleft in two linear-lanceolate lacinulas 3 – 5 mm long, each with yellowish or white vein, and middle truncated lacinula finely inciso-serrated at top. Lateral lacinulas are fibrously disintegrated at margins. Ochreolas 2.5 – 4.0 mm, membranous, light-brown at base, transparent above, cleft in two sharp semitransparent subulate lacinulas at both sides of strongly reduced leaf blade. Perianth white, creamy, or yellowish, with filiform tube 2.0 – 5.5 mm joined to a pedicel 1.5 – 4.0 mm long with articulation. Outer tepals rounded or elliptical, 2.0 – 4.0 × 2.0 – 4.0 mm, prominently reticulate, reflected to a pedicel. Inner tepals rotundate, 4.0 – 5.5 (7) × 4.0 – 5.0 (7) mm, with slightly crenulate margin and reticulate venation. Stamens 8, filaments subulate-filiform, suddenly dilated at base. Anthers rounded-oval. Achenes 2.8 – 4.5 × 1.4 – 2.0 mm, 1.5 times shorter than inner tepals of perianth, ovoid, suddenly acuminate, trigonous, with almost flat faces, obtuse ribs, smooth, glossy, black. Styles three, 0.4 – 0.5 (0.7) mm long, fused to 1 / 4 – 2 / 5, with fimbriate-capitate stigmas 0.3 – 0.4 mm in diam.	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE8FFE5C9F0C600FF37D87B.taxon	etymology	Etymology: — named after Ledebour who reported this taxon from Altai as Tragopyrum pungens M. Bieb.	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE8FFE5C9F0C600FF37D87B.taxon	biology_ecology	Flowering time: — June. Fruiting time: — July – August.	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE8FFE5C9F0C600FF37D87B.taxon	distribution	Distribution: MONGOLIA. [Uvs aimag, Zavkhan aimag]: Ubsunur depression, North Hangay; RUSSIA. Tuva: the East Tannu-Ola ridge, the Uyuk ridge along the Yenisey River; Altai Republic.	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE8FFE5C9F0C600FF37D87B.taxon	biology_ecology	Ecology: — rocks, dry gravely and steppe slopes.	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
03E2D130FFE8FFE5C9F0C600FF37D87B.taxon	discussion	Chromosome numbers: — from 42 to 72, RUSSIA. Altai Republic: Kosh-Agach Raion, vicinity of Kokorya vill., Kostikov & Kostikova (NSK 3000910!), and RUSSIA. Republic of Tuva: Chaa-Khol’ Raion, the shore of the SayanoShushenskii reservoir, Kostikov & Kostikova (NSK 3000907!), both sub A. pungens (M. Bieb.) Ledeb. (Voronkova et al. 2019).	en	Yurtseva, Olga V., Vasilieva, Natalia V., Kostikova, Vera A., Samigullin, Tahir H. (2022): A broadly sampled 3 - loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: III. A. kuvaevii and сryptic species in A. pungens from Southern Siberia and Northern Mongolia. Phytotaxa 566 (1): 13-63, DOI: 10.11646/phytotaxa.566.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.566.1.2
