Ptilotrichum canescens (DC.) C.A. Mey., C.F.von Ledebour, Fl. Altaic. 3: 66 (1831) (syn: Alyssum canescens DC.; Anodontea canescens (DC.) Sweet; Alyssum cretaceum Adams; Alyssum dauricum Schltdl. ex DC.; Alyssum imbricatum Schltdl. ex DC.; Alyssum montanum Patrin ex DC.; Clypeola maritima Georgi; Ptilotrichum cretaceum (Adams) Ledeb.; Stevenia canescens (DC.) D.A.German; Adyseton fischerianum Sweet);
SW. Siberia to W. Himalaya: Altay, China North-Central, Inner Mongolia, Kazakhstan, Mongolia, Qinghai, Tibet, Tuva, West Himalaya, Xinjiang as per POWO;
Perennial herbs, usually laxly caespitose, about 5-10 cm tall, tomentose with stellate, appressed dimorphic trichomes. Rootstocks slender, woody taproot. Stem erect, woody near the base, leafy, simple or sparsely branched. Leaves simple, in dense clusters, linear oblanceolate-oblong, about 5-15 x 0.8-2.5 mm across, base attenuate, margin entire, apex subacute to obtuse, petiole sessile. Inflorescence racemes, 10-20 flowered, simple or branched, elongated in fruit, ebracteate. Flowers bisexual, white, pink, purple, about 5 mm across, pedicel erect or slightly curved, divaricate, slender, filiform, ascending, about 7-8 mm long in fruit, sepals 4, free, erect, linear lanceolate-oblong, inner lateral pair base not saccate, about 2.5 x 1.5 mm across, petals 4, obovate-oblong to spathulate, much or twice longer than sepals, margins entire, apex obtuse or emarginated, about 3.5 x2.5 mm across, claw distinct. Stamens 6, tetradynamous, about 2-3 mm long, filaments fliform, anthers linear-oblong, lateral nectar glands somewhat projected outwards. Ovary superior, ovoid to subglobose, bicarpellary, ovules 1-2. Fruit siliqua, dehiscent rarely subdehiscent or indehiscent, ovate-obovoid, about 3-5 x 2-3 mm across, latiseptate, densely pubescent, valves with prominent midvein, uniformly turgid or inflated, base rounded, apex acute, septum broad complete, style about 1-1.5 mm long. Seeds 1-2, brown, compressed orbicular-suborbicular, ovate-ovoid.
(Attributions: Ganeshaiah, K. N., UAS, Bangalore, India.; Kailash, B. R., ATREE, Bangalore, India.; Royal Norwegian Embassy grants. Indian Bioresource Information Network (IBIN), Department of Biotechnology, New Delhi, India as per India Biodiversity Portal)
Wild flower for ID. Located on the arid banks of Rakshas tal, Tibet. Altitude 15000 feet. Aug 2016.
I can suggest upto family level, see in Brassicaceae..
That is the best I can do at this point – and as mentioned, there may be other species to consider.
I hope Solms-laubachia albiflora (T.Anderson) D.A.German & Al-Shehbaz (according to POWO and Catalogue of Life (Phaeonychium albiflorum according to WFO), formerly Ermania albiflora (T. Anders.) Jafri
Herbarium sheets are not clear, at least leaves match.
POWO specimen- one and two Catalogue of Life (Alyssum canescens DC.) GBIF (High resolution specimens) High resolution specimen Flora of China FOC illustration Flora of Pakistan FOP illustration Pan India Bouquets India Biodiversity Portal