Hieracium arolae subsp. feursteinii Zahn (original description)
Hieracium arolae subsp. luteopallens Zahn (original description)
Hieracium atratum subsp. microdolichaetum Zahn (original description)
Hieracium atratum subsp. subnigrescens (Norrl.) Zahn (original description)
Hieracium bocconei subsp. cornense Zahn (original description)
Hieracium calophyllum subsp. calophylloides (Rohlena & Zahn) Zahn (original description)
Hieracium cantalicum subsp. drazeticum (Arv.-Touv. & Marcailhou) Zahn (original description)
Hieracium cantalicum subsp. lerescheanum Zahn (original description)
Hieracium cantalicum subsp. subpanduratum (Arv.-Touv. & Gaut.) Zahn (original description)
Hieracium carpathicum subsp. parvifolium Zahn (original description)
Hieracium chlorocephalum subsp. stygium (R.Uechtr.) Zahn (original description)
Hieracium flexicaule subsp. durmitoricum (Rohlena & Zahn) Zahn accepted as Hieracium stirovacense subsp. durmitoricum (Rohlena & Zahn) Greuter (original description)
Hieracium flexicaule subsp. stirovacense (Degen & Zahn) Zahn accepted as Hieracium stirovacense Degen & Zahn (original description)
Hieracium glaucophyllum subsp. cuspidifrons Zahn (original description)
Hieracium glaucophyllum subsp. sacalmianum (Arv.-Touv. & Gaut.) Zahn accepted as Hieracium hispanicum subsp. sacalmianum (Arv.-Touv. & Gaut.) Greuter (original description)
Hieracium hispidulum subsp. fusiense (Zahn) Zahn (original description)
Hieracium humile subsp. brachycaule Zahn (original description)
Hieracium humile subsp. huetii (Rouy) Zahn (original description)
Hieracium humile subsp. titanogenes (Sudre) Zahn (original description)
Hieracium jankae subsp. marmoreiforme Zahn (original description)
Hieracium jankae subsp. patentissimum (Freyn & Sint.) Zahn (original description)
Hieracium jankae subsp. tschairlicum Zahn (original description)
Hieracium laevigatum subsp. brotheri (Norrl.) Zahn accepted as Hieracium brotheri Norrl. (original description)
Hieracium laevigatum subsp. crepidioides (Brenner) Zahn accepted as Hieracium crepidioides Brenner (original description)
Hieracium laevigatum subsp. knafii (Čelak.) Zahn (original description)
Hieracium laevigatum subsp. kulkowianum (Zahn) Zahn accepted as Hieracium kulkowianum (Zahn) Üksip ex Üksip (original description)
Hieracium laevigatum subsp. laterale (Norrl.) Zahn accepted as Hieracium laterale (Norrl.) Norrl. (original description)
Hieracium laevigatum subsp. linifolium (Lindeb.) Zahn accepted as Hieracium linifolium Saelán ex Lindeb. (original description)
Hieracium laevigatum subsp. pardalinum (Dahlst.) Zahn accepted as Hieracium pardalinum Dahlst. (original description)
Hieracium laevigatum subsp. pseudogothicum (Arv.-Touv.) Zahn (original description)
Hieracium laevigatum subsp. seticollum (Norrl.) Zahn accepted as Hieracium seticollum Norrl. (original description)
Hieracium laevigatum subsp. stewartii (F.Hanb.) Zahn accepted as Hieracium stewartii (F.Hanb.) Roffey (original description)
Hieracium laevigatum subsp. tridentaticeps (Zahn) Zahn (original description)
Hieracium laevigatum subsp. turbidum (Norrl.) Zahn accepted as Hieracium turbidum Norrl. (original description)
Hieracium lividorubens subsp. formicarium (Elfstr.) Zahn accepted as Hieracium plicatum Lindeb. (original description)
Hieracium lividorubens subsp. microstictum Zahn accepted as Hieracium microstictum (Zahn) Johanss. (original description)
Hieracium marmoreum subsp. auritum (Arv.-Touv.) Zahn accepted as Hieracium marmoreum subsp. reticulatum Nägeli & Peter (original description)
Hieracium murorum subsp. pleuroleucum (Dahlst.) Zahn accepted as Hieracium pleuroleucum (Dahlst.) Üksip (original description)
Hieracium nigrescens subsp. adspersum (Norrl.) Zahn accepted as Hieracium adspersum (Norrl.) Dahlst. (original description)
Hieracium nigrescens subsp. akjaurense (Norrl.) Zahn accepted as Hieracium akjaurense Norrl. (original description)
Hieracium nigrescens subsp. alienatum (Norrl.) Zahn accepted as Hieracium fuliginosum (Laest.) Elfstr. (original description)
Hieracium nigrescens subsp. backhousei (F.Hanb.) Zahn accepted as Hieracium backhousei F.Hanb. (original description)
Hieracium nigrescens subsp. bimanum (Norrl.) Zahn accepted as Hieracium bimanum Norrl. (original description)
Hieracium nigrescens subsp. calenduliflorum (Backh.f.) Zahn accepted as Hieracium calenduliflorum Backh.f. (original description)
Hieracium nigrescens subsp. chlorophaeum Zahn accepted as Hieracium subchlorophaeum Schljakov (original description)
Hieracium nigrescens subsp. chrysostyloides Zahn accepted as Hieracium chrysostyloides (Zahn) Chrtek f. (original description)
Hieracium nigrescens subsp. comatuloides Zahn accepted as Hieracium comatuloides (Zahn) Schljakov (original description)
Hieracium nigrescens subsp. comosum (Elfstr.) Zahn accepted as Hieracium comosum Elfstr. (original description)
Hieracium nigrescens subsp. derivatum (Norrl.) Zahn accepted as Hieracium derivatum Norrl. (original description)
Hieracium nigrescens subsp. diremtum (Norrl.) Zahn accepted as Hieracium diremtum Norrl. (original description)
Hieracium nigrescens subsp. excubitum (Elfstr.) Zahn accepted as Hieracium excubitum Elfstr. (original description)
Hieracium nigrescens subsp. eximium (Backh.f.) Zahn accepted as Hieracium eximium Backh.f. (original description)
Hieracium nigrescens subsp. expansiforme (Dahlst.) Zahn accepted as Hieracium expansiforme Dahlst. (original description)
Hieracium nigrescens subsp. finmarkicum (Elfstr.) Zahn accepted as Hieracium finmarkicum Elfstr. (original description)
Hieracium nigrescens subsp. frondiferum (Elfstr.) Zahn accepted as Hieracium frondiferum (Elfstr.) Elfstr. (original description)
Hieracium nigrescens subsp. fuliginosum (Laest.) Zahn accepted as Hieracium fuliginosum (Laest.) Elfstr. (original description)
Hieracium nigrescens subsp. glabriligulatum (Norrl.) Zahn accepted as Hieracium glabriligulatum Norrl. (original description)
Hieracium nigrescens subsp. globiceps (Dahlst.) Zahn accepted as Hieracium globiceps Dahlst. (original description)
Hieracium nigrescens subsp. graciliusculum Zahn accepted as Hieracium graciliusculum (Zahn) Omang (original description)
Hieracium nigrescens subsp. graniticola (W.R.Linton) Zahn accepted as Hieracium graniticola W.R.Linton (original description)
Hieracium nigrescens subsp. kaldalonense (Dahlst.) Zahn accepted as Hieracium kaldalonense Dahlst. (original description)
Hieracium nigrescens subsp. latypeum (Norrl.) Zahn accepted as Hieracium latypeum Norrl. (original description)
Hieracium nigrescens subsp. leptoglossum (Elfstr.) Zahn accepted as Hieracium leptoglossum (Elfstr.) Dahlst. (original description)
Hieracium nigrescens subsp. lignyotum (Norrl.) Zahn accepted as Hieracium lignyotum Norrl. (original description)
Hieracium nigrescens subsp. lingulatum (Hook. & Arn.) Zahn accepted as Hieracium lingulatum Hook. & Arn. (original description)
Hieracium nigrescens subsp. lujaurense (Norrl.) Zahn accepted as Hieracium glabriligulatum Norrl. (original description)
Hieracium nigrescens subsp. lygistodon (Dahlst.) Zahn accepted as Hieracium lygistodon Dahlst. (original description)
Hieracium nigrescens subsp. melandetum (Omang) Zahn accepted as Hieracium melandetum Omang (original description)
Hieracium nigrescens subsp. naniceps (Elfstr.) Zahn accepted as Hieracium derivatum Norrl. (original description)
Hieracium nigrescens subsp. omangii (Elfstr.) Zahn accepted as Hieracium omangii Elfstr. (original description)
Hieracium nigrescens subsp. personatum (Fr.) Zahn accepted as Hieracium personatum Fr. (original description)
Hieracium nigrescens subsp. petiolatum Zahn accepted as Hieracium petiolosum Dahlst. (original description)
Hieracium nigrescens subsp. polymorphophyllum (Elfstr.) Zahn accepted as Hieracium polymorphophyllum Elfstr. (original description)
Hieracium nigrescens subsp. potamophilon (Elfstr.) Zahn accepted as Hieracium potamophilon Elfstr. (original description)
Hieracium nigrescens subsp. praematurum (Elfstr.) Zahn accepted as Hieracium praematurum Elfstr. (original description)
Hieracium nigrescens subsp. pseudocurvatum Zahn accepted as Hieracium pseudocurvatum (Zahn) Pugsley (original description)
Hieracium nigrescens subsp. pseudopetiolatum Zahn accepted as Hieracium pseudopetiolatum (Zahn) Roffey (original description)
Hieracium nigrescens subsp. pseudophyllodes Zahn accepted as Hieracium pseudophyllodes (Zahn) Üksip ex Üksip (original description)
Hieracium nigrescens subsp. repandum Zahn accepted as Hieracium neorepandum P.D.Sell & C.West (original description)
Hieracium nigrescens subsp. solaricolor Zahn accepted as Hieracium saturicolor Omang (original description)
Hieracium nigrescens subsp. stenomischum (Omang) Zahn accepted as Hieracium stenomischum Omang (original description)
Hieracium nigrescens subsp. stroemfeltii (Dahlst.) Zahn accepted as Hieracium stroemfeltii Dahlst. (original description)
Hieracium nigrescens subsp. subflexicaule Zahn accepted as Hieracium subflexicaule (Zahn) Schljakov (original description)
Hieracium nigrescens subsp. subgracilentipes Zahn accepted as Hieracium subgracilentipes (Zahn) Roffey (original description)
Hieracium nigrescens subsp. subincomptum Zahn accepted as Hieracium incomptum Norrl. (original description)
Hieracium nigrescens subsp. tanense (Elfstr.) Zahn accepted as Hieracium tanense Elfstr. (original description)
Hieracium nigrescens subsp. uralense (Elfstr.) Zahn accepted as Hieracium uralense Elfstr. (original description)
Hieracium nigrescens subsp. varangerense (Elfstr.) Zahn accepted as Hieracium varangerense (Elfstr.) Elfstr. (original description)
Hieracium picroides subsp. subintermixtum Zahn accepted as Hieracium picroides subsp. intermixtum (Zahn) Zahn (original description)
Hieracium picroides subsp. trichopicris (Zahn) Zahn (original description)
Hieracium pinicola subsp. pandatum Zahn (original description)
Hieracium pinicola subsp. plumbagineum (Arv.-Touv.) Zahn (original description)
Hieracium plumulosiforme subsp. albopellitum Zahn accepted as Hieracium thapsiformoides subsp. albopellitum (Zahn) Greuter (original description)
Hieracium prenanthoides subsp. auriflorens Zahn (original description)
Hieracium prenanthoides subsp. bupleurifolium (Tausch) Zahn (original description)
Hieracium prenanthoides subsp. charactophyllum (Omang) Zahn accepted as Hieracium charactophyllum Omang (original description)
Hieracium prenanthoides subsp. constrictum (Arv.-Touv.) Zahn (original description)
Hieracium prenanthoides subsp. divaricatulum Zahn (original description)
Hieracium prenanthoides subsp. ephemeridifolium (Arv.-Touv.) Zahn (original description)
Hieracium prenanthoides subsp. eurylophum (Omang) Zahn (original description)