Abstract
A new natural hybrid Saxifraga ×klimesii Hajman, Horák & Hroneš from Ladakh (NW India) is described and illustrated. This hybrid resulted from cross between Saxifraga meeboldii Engler & Irmscher and Saxifraga pulvinaria Harry Smith. The morphology of the hybrid plants and its parental taxa was evaluated using morphometric analysis of both living plants and herbarium specimens. An artificial cross was also made to compare its morphology with spontaneous hybrids. Ploidy level and relative genome size was established using flow cytometry. Saxifraga ×klimesii is intermediate in morphology and relative genome size between both parents. It differs from S. meeboldii by shorter and wider rosette leaves and lighter yellow, larger and wider petals and from S. pulvinaria by larger rosettes, often more than one pore on leaves and usually yellow coloured petals. A lectotype is selected for S. pulvinaria.