Allium sunhangii - a new species from section Brevidentia F. O. Khass. & Iengal. (Amaryllidaceae) from Southern Pamir-Alay, Uzbekistan Author Khassanov, Furkat O. https://orcid.org/0000-0002-8601-2656 Institute of Botany, Academy of Sciences of Uzbekistan, Tashkent 100125, Uzbekistan Author Pulatov, Sardorjon https://orcid.org/0000-0002-7895-7019 Institute of Botany, Academy of Sciences of Uzbekistan, Tashkent 100125, Uzbekistan Author Asatulloev, Temur https://orcid.org/0000-0001-6484-4016 Institute of Botany, Academy of Sciences of Uzbekistan, Tashkent 100125, Uzbekistan & CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China & University of Chinese Academy of Sciences, Beijing, China Author Ergashov, Ibrokhimjon https://orcid.org/0000-0002-0991-1076 Institute of Botany, Academy of Sciences of Uzbekistan, Tashkent 100125, Uzbekistan & CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China & University of Chinese Academy of Sciences, Beijing, China Author Tojibaev, Komiljon Sh. https://orcid.org/0000-0003-2846-5777 Institute of Botany, Academy of Sciences of Uzbekistan, Tashkent 100125, Uzbekistan ktojibaev@mail.ru Author Yusupov, Ziyoviddin https://orcid.org/0000-0003-2278-542X Institute of Botany, Academy of Sciences of Uzbekistan, Tashkent 100125, Uzbekistan & CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China ziyo-nur87@mail.ru text PhytoKeys 2023 2023-01-24 219 35 48 http://dx.doi.org/10.3897/phytokeys.219.96464 journal article http://dx.doi.org/10.3897/phytokeys.219.96464 1314-2003-219-35 EDA61FA578D85A83B591A28676B166C2 Allium sunhangii F.O.Khass., Tojibaev & Yusupov sp. nov. Figs 1 , 2 , 3 Type . Uzbekistan . Surkhandarya province , Babatag Ridge , Zarkasa peak, 37.986537 , 68.166650 , 2251 m a.s.l. , 22 June 2021 , S.O. Pulatov and O.A.Turdiboev 22062021001 . (TASH109001!, holotype ; TASH109002! and TASH111001!, isotypes) . Description. Bulbs 0.4-0.8 cm wide, 0.7-0.9 cm long, ovoid, solitary tunics reticulate, light brown, bulblets several, smooth, brownish. Scape terete, erect, 4.5-10 cm high, 1.0-1.2 mm wide. Spathe bivalved, persistent, ca 4 mm long, with short beak. Leaves 2-4, narrowly linear, longer than inflorescence, 6-12 cm long, 1.0-1.5 mm wide, semi-terete. Inflorescence lax, umbellate, hemispheric, 10 to 15-flowered. Flowers widely cup-shaped, nearly star-like, ca 5 mm long. Pedicels 2-3 times longer than tepals, at base with bracts. Tepals lanceolate-ovate, smooth, whitish with a dirty greenish-purple midvein, 2.5-4 mm long, outer tepals slightly longer than inner ones. Filaments 1.5-2.0 times longer than tepals, inner ones 3-cuspidate, filament bearing cusp 2 times longer than basal teeth. Style exerted from flowers. Capsule 2 mm in diam. Diagnosis. This species is most similar to Allium brevidens Vved. (Fig. 1 ), from which it differs in a more compact habit, remaining small spathe with a short beak, unequal tepals and strongly exserted, dark violet filaments (Fig. 2 ). Figure 1. Holotype of Allium sunhangii F.O.Khass., Tojibaev & Z.Yuss., sp. nov. Figure 2. Allium sunhangii A-A1 whole and longitudinal section of flower with teeth B view of single flower C cross section of pistil D-D1 bulb tunic and bulb E general view of species without leaves. Distribution and habitat. Allium sunhangii is known from one population occurring to the south in the northwestern part of the Zarkasa peak, at 2251 m a.s.l. (Figs 3 , 4 ). New species grows in continental and drier Juniperus forests (Fig. 4B 1- B2) ( Juniperus seravschanica Kom.) primarily on loamy soil, with shrubs ( Cotoneaster nummularius Fisch. & C.A.Mey., Lonicera nummulariifolia Jaub. & Spach, Rosa canina L., Rosa ecae Aitch.), perennial ( Convolvulus lineatus L., Dianthus tetralepis Nevski & Schischk., Eremurus Phlomis olgae Regel, Gentiana olivieri Griseb., Hypericum scabrum L., Malva neglecta Wallr., Phlomis olgae Regel, Primula baldshuanica B. Fedtsch., Ziziphora pamiroalaica Juz.), annual and biennial ( Cousinia candicans Juz., C. microcarpa Boiss., Daucus carota L., Lactuca serriola L., Lappula microcarpa (Ledeb.) Giirke, Veronica cardiocarpa (Kar. & Kir.) Walp.,) herbs and is always with dominance by Carex pachystylis J.Gay. Figure 3. Distribution of Allium sunhangii , A. brevidens , A. nikolai and A. pshikharvicum . Figure 4. A1-A2 inflorescence and general view of growing Allium sunhangii B1-B2 Zarkasa peak and habitat landscape. Etymology. Allium sunhangii is named after Prof. Sun Hang, one of the leading botanists at the Kunming Institute of Botany, Chinese Academy of Sciences, China, who actively promotes several projects within Central Asia. Phenology. Allium sunhangii was flowering (Fig. 4 A 1-A2) on 22 June, 2021 when we found its fruits began to mature at the same time. It is supposed that flowering starts in about late May and/or early June. As we visited this area only once, we are not sure when fruiting finishes. Conservation status. Allium sunhangii is so far only known from two closely spaced localities. The total distribution area of this species is around 5 km2. The total number of individuals does not exceed 41. However, the new species is categorized as 'Data Deficient' (DD) according to IUCN (2019) criteria.