Hieracium virosum
Hieracium virosum is a species of flowering plant in the hawkweed genus Hieracium (family Asteraceae). It is native to non-arid temperate areas of Eurasia, from southeastern and eastern Europe, Central Asia, across Siberia, Mongolia, northern China, and as far as Sakhalin island. A perennial of the steppes and forest-steppes, it is not apomictic.

Subtaxa
The following subspecies are accepted:
Hieracium virosum subsp. foliosum  – the former Yugoslavia, Bulgaria, Romania, Ukraine 
Hieracium virosum subsp. virosum – entire range, except Bulgaria

References

virosum
Flora of Yugoslavia
Flora of Bulgaria
Flora of Romania
Flora of Ukraine
Flora of the Crimean Peninsula
Flora of South European Russia
Flora of Central European Russia
Flora of East European Russia
Flora of the North Caucasus
Flora of Siberia
Flora of the Russian Far East
Flora of Central Asia
Flora of Afghanistan
Flora of West Himalaya
Flora of Xinjiang
Flora of Inner Mongolia
Flora of Mongolia
Plants described in 1771