Hieracium achnolepium Zahn (original description)
Hieracium aclados Zahn (original description)
Hieracium acrochaetium Zahn (original description)
Hieracium acrocladium Zahn (original description)
Hieracium acrophyes Zahn (original description)
Hieracium acrosciadium Zahn (original description)
Hieracium acrotephraeum Zahn (original description)
Hieracium actinanthum Zahn (original description)
Hieracium acutisquamum Zahn (original description)
Hieracium acutum Zahn (original description)
Hieracium adenocalathium (Zahn) Zahn accepted as Hieracium jurassicum subsp. adenocalathium (Zahn) Greuter (original description)
Hieracium adenodes Zahn (original description)
Hieracium adenophyton (Zahn) Zahn (original description)
Hieracium adriaticiforme (Zahn) Zahn accepted as Pilosella anobrachia (Arv.-Touv. & Gaut.) S.Bräut. & Greuter (original description)
Hieracium albidobracteum Zahn (original description)
Hieracium albofloccosum Zahn (original description)
Hieracium albovelutinum Zahn (original description)
Hieracium albulae Zahn (original description)
Hieracium albulanum Zahn (original description)
Hieracium algidiforme Zahn (original description)
Hieracium algidum Zahn (original description)
Hieracium alpigena Zahn (original description)
Hieracium amaurodes Zahn (original description)
Hieracium amphileucum Zahn (original description)
Hieracium amphitiltum Zahn (original description)
Hieracium amplexicaule subsp. chenevardianum Zahn (original description)
Hieracium amplisquamum Zahn (original description)
Hieracium angustissimum Zahn (original description)
Hieracium angustius Zahn (original description)
Hieracium anolasium Zahn (original description)
Hieracium aquileiense Zahn (original description)
Hieracium arcuatum Zahn (original description)
Hieracium argenticapillum Zahn (original description)
Hieracium argyrocalyx Zahn (original description)
Hieracium argyrocephalum Zahn (original description)
Hieracium armigerum Zahn (original description)
Hieracium assimile Zahn (original description)
Hieracium atricapitulum Zahn (original description)
Hieracium atrisquamum Zahn (original description)
Hieracium atropaniculatum Zahn (original description)
Hieracium auriculiflorum Zahn (original description)
Hieracium auriculifolium Zahn (original description)
Hieracium auropurpureum Zahn (original description)
Hieracium austerum Zahn (original description)
Hieracium averianum Zahn (original description)
Hieracium bagnense Zahn (original description)
Hieracium baldense Zahn (original description)
Hieracium barbisquamum Zahn (original description)
Hieracium basiglaucum Zahn (original description)
Hieracium basischistum Zahn (original description)
Hieracium bellidifolium Zahn (original description)
Hieracium berninense Zahn (original description)
Hieracium bessei Zahn (original description)
Hieracium beverianum Zahn (original description)
Hieracium bifidiforme Zahn (original description)
Hieracium blyttianoides Zahn (original description)
Hieracium brachycladum Zahn (original description)
Hieracium brachylepium Zahn (original description)
Hieracium brachypodum Zahn (original description)
Hieracium brachypogon (Zahn) Zahn accepted as Hieracium tephrosoma subsp. brachypogon (Zahn) Zahn (original description)
Hieracium bracteolosum Zahn (original description)
Hieracium brevicaule Zahn (original description)
Hieracium breviflorum Zahn (original description)
Hieracium brevifurcum Zahn (original description)
Hieracium brevipes Zahn (original description)
Hieracium calanthodes Zahn (original description)
Hieracium calanthodium Zahn (original description)
Hieracium calcicola Zahn (original description)
Hieracium calocymum Zahn (original description)
Hieracium calodes Zahn (original description)
Hieracium calvulum Zahn (original description)
Hieracium canisquamum Zahn (original description)
Hieracium canofloccosum Zahn (original description)
Hieracium capillatum Zahn (original description)
Hieracium carpathicola Zahn (original description)
Hieracium chaetobium Zahn (original description)
Hieracium chaetodes Zahn (original description)
Hieracium chaunothyrsum Zahn (original description)
Hieracium chiamuerae Zahn (original description)
Hieracium christeneri Zahn (original description)
Hieracium chrysanthes Zahn (original description)
Hieracium chrysochroum Zahn (original description)
Hieracium chrysoniphobium Zahn (original description)
Hieracium cinerosum Zahn (original description)
Hieracium cirritoides Zahn (original description)
Hieracium citrinum Besse & Zahn (original description)
Hieracium clariceps Zahn (original description)
Hieracium claropurpureum Zahn (original description)
Hieracium collutum Zahn (original description)
Hieracium coloratipes Zahn (original description)
Hieracium comigerum Zahn (original description)
Hieracium comolepium Zahn (original description)
Hieracium comophyllum Zahn (original description)
Hieracium coniophorum Zahn (original description)
Hieracium cottetii subsp. erucophyllum Zahn accepted as Hieracium erucophyllum Prain (original description)
Hieracium crestanum Zahn (original description)
Hieracium crispulum Zahn (original description)
Hieracium crocanthes Zahn (original description)
Hieracium cuneense Zahn (original description)
Hieracium cymosella Zahn (original description)