This is a comprehensive list of the vascular plants of the Karelian Isthmus, a land mass in Russia connected to Finland on one side and otherwise surrounded by three bodies of water: the Gulf of Finland, the Neva River, and Lake Ladoga.
*"Hieracium ahtii" - rare
*"Hieracium reticulatum" - rare
*"Hieracium chlorellum" - rare
*"Hieracium crispulum" - rare
*"Hieracium prolixum" - rare
*"Hieracium triangulare" - rare
*"Hieracium caesiomurorum" - rare
*"Hieracium fulvescens" - rare
*"Hieracium caesium" - rare
*"Hieracium coniops" - rare
*"Hieracium laeticolor" - rare
*"Hieracium plumbeum" - rare
*"Hieracium ravidum"
*"Hieracium caespiticola" - rare
*"Hieracium chloromaurum" - rare
*"Hieracium diaphanoides" - rare
*"Hieracium pseudopellucidum" - rare
*"Hieracium silenii"
*"Hieracium subpellucidum"
*"Hieracium godbyense" - rare
*"Hieracium oistophyllum" - rare
*"Hieracium penduliforme" - rare
*"Hieracium philanthrax"
*"Hieracium karelorum"
*"Hieracium prolatatum" - rare
*"Hieracium laevigatum"
*"Hieracium lissolepium" - rare
*"Hieracium tridentatum" - rare
*"Hieracium dispansiforme" - rare
*"Hieracium distendens"
*"Hieracium hjeltii" - rare
*"Hieracium lepistoides"
*"Hieracium morulum"
*"Hieracium patale"
*"Hieracium pellucidum" - rare
*"Hieracium praetenerum"
*"Hieracium subcaesium"
*"Hieracium submarginellum"
*"Hieracium umbellatum" - common
*"Hieracium diversifolium"
*"Hieracium incurrens"
*"Hieracium vulgatum" - common