List of Piper species
- Piper abajoense Bornst.
- Piper abalienatum Trel.
- Piper abbadianum Yunck.
- Piper abbreviatum Opiz
- Piper abellinum Trel. & Yunck.
- Piper aberrans C.DC.
- Piper abutiloides (Kunth) Kunth ex Steud.
- Piper achoteanum Trel.
- Piper achotense Trel. & Yunck.
- Piper achromatolepis Trel.
- Piper achupallasense Yunck.
- Piper acre Blume
- Piper actae Trel.
- Piper acutamentum C.DC.
- Piper acutibracteum C.DC.
- Piper acutifolium Ruiz & Pav.
- Piper acutilimbum C.DC.
- Piper acutissimum Trel.
- Piper acutistigmum C.DC.
- Piper acutistipulum C.DC.
- Piper acutiusculum C.DC.
- Piper acutulum Trel.
- Piper adamatum Trel. & Standl.
- Piper addisonii Yunck.
- Piper adenandrum (Miq.) C.DC.
- Piper adenophlebium Trel.
- Piper admirabile Yunck.
- Piper adreptum Trel.
- Piper aduncum L.
- Piper aequale Vahl
- Piper aereum Trel.
- Piper aeruginosibaccum Trel.
- Piper affectans Trel.
- Piper affictum Trel.
- Piper afflictum Trel.
- Piper agellifolium Trel. & Yunck.
- Piper aghaense E.F.Guim. & Carv.-Silva
- Piper agostiniorum Steyerm.
- Piper aguacalientis Trel.
- Piper aguadulcense Yunck.
- Piper agusanense C.DC.
- Piper ailigandiense Callejas
- Piper alajuelanum Trel.
- Piper alatabaccum Trel. & Yunck.
- Piper alatipetiolatum Yunck.
- Piper albamentum C.DC.
- Piper albanense Yunck.
- Piper albiciliatum Yunck.
- Piper albidiflorum C.DC.
- Piper albidistigmatum C.DC.
- Piper albidum Kunth
- Piper albogranulatum Trel.
- Piper albomaculatum D.Dietr.
- Piper albopapillatum Trel.
- Piper albopilosum Yunck.
- Piper albopunctatum C.DC.
- Piper albopunctulatissimum Trel.
- Piper albozonatum C.DC.
- Piper albuginiferum Trel.
- Piper alexii Callejas
- Piper aleyreanum C.DC.
- Piper allardii Yunck.
- Piper allatum Trel.
- Piper allisum Trel.
- Piper alnoides (Kunth) Kunth ex Steud.
- Piper altevaginans Trel.
- Piper alushii Callejas
- Piper alveolatum Opiz
- Piper amalago L.
- Piper amoenum Yunck.
- Piper amparoense Yunck.
- Piper amphibium Trel.
- Piper amphioxys Trel.
- Piper amphitrichum Trel.
- Piper amphoricarpum Trel.
- Piper amplectenticaule Trel. & Yunck.
- Piper amplum (Kunth) Steud.
- Piper anastylum Trel.
- Piper andakiensis W.Trujillo-C. & Callejas
- Piper andreanum C.DC.
- Piper andresense Trel.
- Piper androgynum C.DC.
- Piper angamarcanum Sodiro ex C.DC.
- Piper angsiense I.M.Turner
- Piper angustifolium Lam.
- Piper angustipeltatum Merr.
- Piper anisophyllum Trel.
- Piper anisopleurum C.DC.
- Piper anisotis Hook.f.
- Piper anisotrichum C.DC.
- Piper anisum (Spreng.) Angely
- Piper annulatispicum Trel. & Yunck.
- Piper anonifolium (Kunth) Steud.
- Piper anonymum Trel.
- Piper anostachyum Yunck.
- Piper antherisobovatum Callejas
- Piper antioquiense C.DC.
- Piper antonense Callejas
- Piper apertum Trel.
- Piper apodum Trel.
- Piper appendiculatum (Benth.) C.DC.
- Piper apurimacanum Trel.
- Piper apus Trel.
- Piper aramanum C.DC.
- Piper araneatum Trel.
- Piper araquei Yunck.
- Piper arbelaezii Trel. & Yunck.
- Piper arboreum Aubl.
- Piper arborigaudens C.DC.
- Piper arborioccupans Trel. ex Callejas
- Piper arcessitum Trel.
- Piper archeri Trel. & Yunck.
- Piper arcteacuminatum Trel.
- Piper arcuatum Blume
- Piper arduum Trel.
- Piper arenicola Trel.
- Piper areolatum (Miq.) C.DC.
- Piper arfakianum C.DC.
- Piper argentamentum Trel. & Yunck.
- Piper argyrites Ridl. ex C.DC.
- Piper argyroneurum Hallier f.
- Piper argyrophyllum Miq.
- Piper arieianum C.DC.
- Piper aristolochiphyllum Quisumb.
- Piper armatum Trel. & Yunck.
- Piper aromaticaule Callejas
- Piper arrectispicum Trel.
- Piper arreptum Trel.
- Piper artanthe C.DC.
- Piper artanthopse C.DC.
- Piper articulatum A.Rich.
- Piper arunachalense Gajurel, Rethy & Y.Kumar
- Piper arundinetorum Trel.
- Piper ascendentispicum Trel.
- Piper asclepiadifolium Trel.
- Piper aserrianum Trel.
- Piper aspericaule Trel.
- Piper asperilimbum C.DC.
- Piper asperiusculum Kunth
- Piper asperulibaccum C.DC.
- Piper asplundii Yunck.
- Piper asterocarpum Trel.
- Piper asterostigmum Quisumb.
- Piper asterotrichum C.DC.
- Piper asymmetricum C.DC.
- Piper atlantidanum Trel.
- Piper atrichopus Trel.
- Piper atrobaccum Trel. & Yunck.
- Piper atroglandulosum Tebbs
- Piper atropremnon Trel.
- Piper attenuatamentum Trel.
- Piper attenuatum Buch.-Ham. ex Miq.
- Piper augustum Rudge
- Piper aulacospermum Callejas
- Piper auriculiferum Trel.
- Piper auriculilaminum Yunck.
- Piper aurilimbum C.DC.
- Piper auritifolium Trel.
- Piper auritum Kunth
- Piper aurorubrum C.DC.
- Piper austini Trel.
- Piper austrocaledonicum C.DC.
- Piper austromexicanum Trel.
- Piper austrosinense Y.C.Tseng
- Piper avanum Wall.
- Piper avellanum (Miq.) C.DC.
- Piper azuaiense Yunck.
- Piper azupizuanum Trel.