Many species of the genus Heracleum are similar in appearance.
An outlier is H. mantegazzianum, the large size of which is exceptional.
Common species include:
Heracleum mantegazzianum, giant hogweed, native to the western Caucasus region of Eurasia, a serious invasive species in many areas of Europe and North America
Heracleum sosnowskyi, Sosnowsky's hogweed, a common weed throughout Europe and Asia
Heracleum persicum, Persian hogweed, native to Iran, Iraq, and Turkey
Heracleum sphondylium, common hogweed, native to Europe and Asia
Heracleum maximum, cow parsnip, native and common in North America
As of July 2019, Plants of the World Online accepts the following 148 species:
Heracleum abyssinicum (Boiss.)
C.Norman
Heracleum aconitifolium Woronow
Heracleum acuminatum Schleich.

Heracleum aestivum Jord.

Heracleum akasimontanum Koidz.

Heracleum amanum Boiss. &
Kotschy
Heracleum amplifolium Lapeyr.

Heracleum amplissimum Wender.

Heracleum angustatum Boreau
Heracleum anisactis Boiss. &
Hohen.

Heracleum antasiaticum Manden.

Heracleum apiifolium Boiss.

Heracleum arcticum Rupr.

Heracleum asperum (Hoffm.)
M.Bieb.

Heracleum atlanticum Coss.
ex Batt.

Heracleum australe (Hartm.)
Stankov
Heracleum austriacum L.
Heracleum bailletianum Timb.-Lagr. &
Marcais
Heracleum benearnense Rouy & E.G.Camus
Heracleum bhutanicum M.F.Watson
Heracleum bifarium Fisch.
ex Rchb.

Heracleum bipinnatum Guss.
ex DC.

Heracleum biternatum W.W.Sm.

Heracleum branca Steud.

Heracleum branca-ursina All.

Heracleum brignoliifolia Franch.

Heracleum canariense Choisy ex DC.

Heracleum candicans Wall.
ex DC.

Heracleum candolleanum Gamble
Heracleum carmeli Wender.

Heracleum carneiflorum Gand.

Heracleum caspicum DC.

Heracleum caucasicum Steven
Heracleum ceretanum Sennen
Heracleum chorodanum (Hoffm.)
DC.

Heracleum cinereum Lindl.

Heracleum circassicum Manden.

Heracleum coreanum H.Boissieu
Heracleum crantzii Thell.

Heracleum crenatifolium Boiss.

Heracleum cuneiforme DC.

Heracleum dalgadianum S.M.Almeida
Heracleum decipiens Fisch.
ex Hoffm.

Heracleum delphinense Jord.

Heracleum dissectifolium K.T.Fu
Heracleum dissectum Ledeb.

Heracleum dubium Ten.

Heracleum egrissicum Gagnidze
Heracleum elgonense (H.Wolff) Bullock
Heracleum fargesii H.Boissieu
Heracleum fastuosum Salisb.

Heracleum flavescens Baumg.

Heracleum forrestii H.Wolff
Heracleum franchetii M.Hiroe
Heracleum freynianum Sommier & Levier
Heracleum glaberrimum (Beck) Dalla Torre
Heracleum gorganicum Rech.f.

Heracleum grandiflorum Steven ex M.Bieb.

Heracleum grossheimii Manden.

Heracleum hemsleyanum Diels
Heracleum henryi H.Wolff
Heracleum humile Sm.

Heracleum hypoleucum Vis.

Heracleum idae Kulieva
Heracleum insigne Dalla Torre & Sarnth.

Heracleum intermedium Gaudin
Heracleum isopetalum Maxim.

Heracleum jacquemontii C.B.Clarke
Heracleum jugatum Boiss.

Heracleum kansuense Diels
Heracleum kingdonii H.Wolff
Heracleum laciniatum Hornem.

Heracleum lecoquii Martrin-Donos
Heracleum lehmannianum Bunge
Heracleum leichtlinii J.N.Haage & E.Schmidt
Heracleum leskovii Grossh.

Heracleum ligusticifolium M.Bieb.

Heracleum likiangense H.Wolff
Heracleum macranthum Borbás
Heracleum mandenovae Satzyp.

Heracleum mantegazzianum Sommier & Levier
Heracleum marginatum Fisch.
ex Hoffm.

Heracleum maximum W.Bartram
Heracleum moellendorffii Hance
Heracleum multibracteatum Rech.f.

Heracleum nanum Satzyp.

Heracleum nyalamense R.H.Shan & T.S.Wang
Heracleum oncosepalum (Hand.-Mazz.)
Pimenov & Kljuykov
Heracleum oreocharis H.Wolff
Heracleum orphanidis Boiss.

Heracleum ossethicum Manden.

Heracleum paphlagonicum Czeczott
Heracleum pastinaca Fenzl
Heracleum persicum Desf.
ex Fisch.,
C.A.Mey. &
Avé-Lall.

Heracleum peshmeniana Ekim
Heracleum pinnatum C.B.Clarke
Heracleum platytaenium Boiss.

Heracleum polyadenum Rech.f.

Heracleum ponticum (Lipsky) Schischk.
ex Grossh.

Heracleum pratense Jord.
ex F.W.Schultz
Heracleum protheiforme Crantz
Heracleum pubescens (Hoffm.)
M.Bieb.

Heracleum pulchellum Pall.
ex Ledeb.

Heracleum pulchrum Zumagl.

Heracleum pumilum Vill.

Heracleum pusillum Pall.
ex Ledeb.

Heracleum rapula Franch.

Heracleum rawianum C.C.Towns.

Heracleum rechi
Many species of the genus Heracleum are similar in appearance. An outlier is H. mantegazzianum, the large size of which is exceptional. Common species include:
Heracleum mantegazzianum, giant hogweed, native to the western Caucasus region of Eurasia, a serious invasive species in many areas of Europe and North America
Heracleum sosnowskyi, Sosnowsky's hogweed, a common weed throughout Europe and Asia
Heracleum persicum, Persian hogweed, native to Iran, Iraq, and Turkey
Heracleum sphondylium, common hogweed, native to Europe and Asia
Heracleum maximum, cow parsnip, native and common in North America
As of July 2019, Plants of the World Online accepts the following 148 species:
Heracleum abyssinicum (Boiss.) C.Norman
Heracleum aconitifolium Woronow
Heracleum acuminatum Schleich.
Heracleum aestivum Jord.
Heracleum akasimontanum Koidz.
Heracleum amanum Boiss. & Kotschy
Heracleum amplifolium Lapeyr.
Heracleum amplissimum Wender.
Heracleum angustatum Boreau
Heracleum anisactis Boiss. & Hohen.
Heracleum antasiaticum Manden.
Heracleum apiifolium Boiss.
Heracleum arcticum Rupr.
Heracleum asperum (Hoffm.) M.Bieb.
Heracleum atlanticum Coss. ex Batt.
Heracleum australe (Hartm.) Stankov
Heracleum austriacum L.
Heracleum bailletianum Timb.-Lagr. & Marcais
Heracleum benearnense Rouy & E.G.Camus
Heracleum bhutanicum M.F.Watson
Heracleum bifarium Fisch. ex Rchb.
Heracleum bipinnatum Guss. ex DC.
Heracleum biternatum W.W.Sm.
Heracleum branca Steud.
Heracleum branca-ursina All.
Heracleum brignoliifolia Franch.
Heracleum canariense Choisy ex DC.
Heracleum candicans Wall. ex DC.
Heracleum candolleanum Gamble
Heracleum carmeli Wender.
Heracleum carneiflorum Gand.
Heracleum caspicum DC.
Heracleum caucasicum Steven
Heracleum ceretanum Sennen
Heracleum chorodanum (Hoffm.) DC.
Heracleum cinereum Lindl.
Heracleum circassicum Manden.
Heracleum coreanum H.Boissieu
Heracleum crantzii Thell.
Heracleum crenatifolium Boiss.
Heracleum cuneiforme DC.
Heracleum dalgadianum S.M.Almeida
Heracleum decipiens Fisch. ex Hoffm.
Heracleum delphinense Jord.
Heracleum dissectifolium K.T.Fu
Heracleum dissectum Ledeb.
Heracleum dubium Ten.
Heracleum egrissicum Gagnidze
Heracleum elgonense (H.Wolff) Bullock
Heracleum fargesii H.Boissieu
Heracleum fastuosum Salisb.
Heracleum flavescens Baumg.
Heracleum forrestii H.Wolff
Heracleum franchetii M.Hiroe
Heracleum freynianum Sommier & Levier
Heracleum glaberrimum (Beck) Dalla Torre
Heracleum gorganicum Rech.f.
Heracleum grandiflorum Steven ex M.Bieb.
Heracleum grossheimii Manden.
Heracleum hemsleyanum Diels
Heracleum henryi H.Wolff
Heracleum humile Sm.
Heracleum hypoleucum Vis.
Heracleum idae Kulieva
Heracleum insigne Dalla Torre & Sarnth.
Heracleum intermedium Gaudin
Heracleum isopetalum Maxim.
Heracleum jacquemontii C.B.Clarke
Heracleum jugatum Boiss.
Heracleum kansuense Diels
Heracleum kingdonii H.Wolff
Heracleum laciniatum Hornem.
Heracleum lecoquii Martrin-Donos
Heracleum lehmannianum Bunge
Heracleum leichtlinii J.N.Haage & E.Schmidt
Heracleum leskovii Grossh.
Heracleum ligusticifolium M.Bieb.
Heracleum likiangense H.Wolff
Heracleum macranthum Borbás
Heracleum mandenovae Satzyp.
Heracleum mantegazzianum Sommier & Levier
Heracleum marginatum Fisch. ex Hoffm.
Heracleum maximum W.Bartram
Heracleum moellendorffii Hance
Heracleum multibracteatum Rech.f.
Heracleum nanum Satzyp.
Heracleum nyalamense R.H.Shan & T.S.Wang
Heracleum oncosepalum (Hand.-Mazz.) Pimenov & Kljuykov
Heracleum oreocharis H.Wolff
Heracleum orphanidis Boiss.
Heracleum ossethicum Manden.
Heracleum paphlagonicum Czeczott
Heracleum pastinaca Fenzl
Heracleum persicum Desf. ex Fisch., C.A.Mey. & Avé-Lall.
Heracleum peshmeniana Ekim
Heracleum pinnatum C.B.Clarke
Heracleum platytaenium Boiss.
Heracleum polyadenum Rech.f.
Heracleum ponticum (Lipsky) Schischk. ex Grossh.
Heracleum pratense Jord. ex F.W.Schultz
Heracleum protheiforme Crantz
Heracleum pubescens (Hoffm.) M.Bieb.
Heracleum pulchellum Pall. ex Ledeb.
Heracleum pulchrum Zumagl.
Heracleum pumilum Vill.
Heracleum pusillum Pall. ex Ledeb.
Heracleum rapula Franch.
Heracleum rawianum C.C.Towns.
Heracleum rechi
Heracleum (plant)