Carduus khekii Murr (original description)
Carduus macedonicus Charrel. (original description)
Centaurea argyrocephala Freyn & Sint. accepted as Centaurea consanguinea DC. (original description)
Centaurea psephelloides Freyn & Sint. accepted as Psephellus psephelloides (Freyn & Sint.) Wagenitz (original description)
Centaurea sintenisii Freyn accepted as Psephellus aucherianus (DC.) Boiss. (original description)
Centaurea subcordata Freyn & Sint. accepted as Centaurea nigrescens Willd. (original description)
Cirsium haynaldii Borbás (original description)
Cousinia bicolor Freyn & Sint. (original description)
Cousinia decolorans Freyn & Sint. (original description)
Cousinia intertexta Freyn & Sint. (original description)
Cousinia onopordon Freyn & Sint. accepted as Cousinia canescens DC. (original description)
Cousinia sintenisii Freyn (original description)
Crepis bupleurifolia (Boiss. & Kotschy) Freyn & Sint. ex Freyn & Sint. (original description)
Gundelia tenuisecta (Boiss.) Freyn & Sint. accepted as Gundelia tournefortii L. (original description)
Hieracium armenum Freyn & Sint. accepted as Hieracium microtum subsp. armenum (Freyn & Sint.) Greuter (original description)
Hieracium calisii Evers ex Huter (original description)
Hieracium eginense Freyn & Sint. (original description)
Hieracium igneum Freyn (original description)
Hieracium incrassatum Błocki (original description)
Hieracium leucothecum Uechtr. ex Freyn accepted as Hieracium schmidtii subsp. leucothecum (Freyn) Greuter (original description)
Hieracium odontophyllum Freyn & Sint. ex Freyn (original description)
Hieracium rostafinskii Błocki (original description)
Hieracium sintenisii Freyn accepted as Pilosella sintenisii (Freyn) Soják (original description)
Hieracium sipikorense Freyn & Sint. (original description)
Hieracium sympodiale Borbás (original description)
Hieracium twardowskianum Rehm. & Woł. (original description)
Lapsana glandulosa Freyn & Sint. (original description)
Phaeopappus freynii Sint. ex Freyn (original description)
Reichardia dichotoma (DC.) Freyn (original description)
Scorzonera sintenisii Freyn accepted as Scorzonera tomentosa L. (original description)
Tragopogon albinervis Freyn & Sint. (original description)
Tragopogon rumelicus Velen. accepted as Tragopogon orientalis L. (original description)
Uechtritzia Freyn (original description)
Uechtritzia armena Freyn & Sint. ex Freyn (original description)