| Piper abalienatum Trel. |
| Piper abbadianum Yunck. |
| Piper abbreviatum Opiz |
| Piper abditum Trel. |
| Piper abutilifolium (Miq.) C. DC. |
| Piper achoteanum Trel. |
| Piper achromatolepis Trel. |
| Piper achupallasense Yunck. |
| Piper acutifolium Ruiz & Pav. |
| Piper acutifolium var. acutifolium |
| Piper acutiusculum C. DC. |
| Piper acutulum Trel. |
| Piper adenandrum (Miq.) C.DC. |
| Piper admirabile Yunck. |
| Piper adreptum Trel. |
| Piper aduncum L. |
| Piper aduncum var. aduncum |
| Piper aduncum var. cordulatum (C.DC.) Yunck. |
| Piper aequale Vahl |
| Piper aequale var. laurifolium (Trel.) Yunck. |
| Piper aereum Trel. |
| Piper affictum Trel. |
| Piper afflictum Trel. |
| Piper agostiniorum Steyerm. |
| Piper aguadulcense Yunck. |
| Piper alatabaccum Trel. & Yunck. |
| Piper albiciliatum Yunck. |
| Piper albidum Kunth |
| Piper albogranulatum Trel. |
| Piper albopapillatum Trel. |
| Piper albozonatum C. DC. |
| Piper aleyreanum C. DC. |
| Piper allardii Yunck. |
| Piper alnoides Kunth |
| Piper alveolatum Opiz |
| Piper amalago L. |
| Piper amalago var. variifolia (Griseb.) Fawc. & Rendle |
| Piper amboinense (Miq.) C. DC. |
| Piper amboinense var. latifolium (Miq.) C. DC. |
| Piper amparoense Yunck. |
| Piper amphitrichum Trel. |
| Piper amplectenticaule Trel. & Yunck. |
| Piper amplum Kunth |
| Piper anastylum Trel. |
| Piper andreanum C. DC. |
| Piper androgynum C. DC. |
| Piper angamarcanum C. DC. |
| Piper anonifolium (Kunth) Steud. |
| Piper anonifolium var. parkerianum (Miq.) Steyerm. |
| Piper anonymum Trel. |
| Piper apodum Trel. |
| Piper appendiculatum (Benth.) C. DC. |
| Piper apurimacanum Trel. |
| Piper apus Trel. |
| Piper araneatum Trel. |
| Piper arbelaezii Trel. & Yunck. |
| Piper arborescens Roxb. |
| Piper arboreum Aubl. |
| Piper arboreum subsp. arboreum |
| Piper arboreum var. hirtellum Yunck. |
| Piper arduum Trel. |
| Piper areolatum (Miq.) C. DC. |
| Piper aristolochiaefolium (Trel.) Yunck. |
| Piper armatum Trel. & Yunck. |
| Piper arnottianum (Miq.) C. DC. |
| Piper arrectispicum Trel. |
| Piper arreptum Trel. |
| Piper artanthe C.DC. |
| Piper arthantopse C. DC. |
| Piper arunachalensis Gajurel, P.R., P. Rethy & Y. Kumar |
| Piper ascendentispicum Trel. |
| Piper asclepiadifolium Trel. |
| Piper asperilimbum C.DC. |
| Piper asperiusculum Kunth |
| Piper asplundii Yunck. |
| Piper asterocarpum Trel. |
| Piper asterotrichum C. DC. |
| Piper atroglandulosum Tebbs |
| Piper attenuatamentum Trel. |
| Piper attenuatum Buch.-Ham. ex Miq. |
| Piper augustum Rudge |
| Piper augustum var. cocleanum (Trel.) Yunck. |
| Piper auriculatum (Miq.) C. DC. |
| Piper auritum Kunth |
| Piper austrosinense Y.Q. Tseng |
| Piper avellanum (Miq.) C.DC. |
| Piper azuaiense Yunck. |
| Piper azupizuanum Trel. |
| Piper baccans (Miq.) C.DC. |
| Piper baccans var. sancarlosianum (C.DC.) Steyerm. |
| Piper baezanum C. DC. |
| Piper baezense Trel. |
| Piper bahiense (C. Presl) C. DC. |
| Piper balsapuertanum Trel. |
| Piper bambusifolium Y.Q. Tseng |
| Piper barbatum Kunth |
| Piper barbicuspe Trel. |
| Piper barbulantherum Trel. |
| Piper bartlingianum (Miq.) C.DC. |
| Piper begoniiforme Yunck. |
| Piper bellidifolium Yunck. |
| Piper bermejanum Trel. & Yunck. |
| Piper berryi Steyerm. |
| Piper berteroanum C. DC. |
| Piper betle L. |
| Piper betle f. densum (Blume) Fosberg |
| Piper betle f. marianum (Opiz) Fosberg |
| Piper biauritum C. DC. |
| Piper biolleyi C. DC. |
| Piper bisasperatum Trel. |
| Piper biseriatum C. DC. |
| Piper blanchetii (Miq.) C. DC. |
| Piper boehmeriifolium (Miq.) Wall. ex C. DC. |
| Piper boehmeriifolium var. boehmeriifolium |
| Piper boehmeriifolium var. glabricaule (C. DC.) M.G. Gilbert & N.H. Xia |
| Piper bogotense C.DC. |
| Piper bolivaranum Yunck. |
| Piper bonii C. DC. |
| Piper boquetense Yunck. |
| Piper borbonense (Miq.) C. DC. |
| Piper bosnicanum C.DC. |
| Piper botterii C. DC. |
| Piper brachipilum Yunck. |
| Piper brachypodon (Benth.) C. DC. |
| Piper brachystylum Trel. |
| Piper brachytrichum Trel. |
| Piper brasiliense C. DC. |
| Piper bredemeyeri J.Jacq. |
| Piper brevesanum Yunck. |
| Piper brevestrigillosum Trel. |
| Piper brevispicum C. DC. |
| Piper brongniartii (Miq.) C. DC. |
| Piper bullatifolium Sodiro |
| Piper bullosum C. DC. |
| Piper caballocochanum Trel. |
| Piper cajamarcanum Yunck. |
| Piper caladiifolium (Miq.) C. DC. |
| Piper calamistratum Trel. |
| Piper calcariformis Tebbs |
| Piper calceolarium C. DC. |
| Piper caldasianum (Miq.) Yunck. |
| Piper caldense C. DC. |
| Piper callcanense Trel. |
| Piper callosum Ruiz & Pav. |
| Piper calvescentinerve Trel. |
| Piper calvibaccum Trel. |
| Piper cambessedesii (Miq.) C. DC. |
| Piper cambessedesii var. opulifolium (Miq.) C. DC. |
| Piper camiloi Trel. & Yunck. |
| Piper campanum Yunck. |
| Piper camphoriferum C. DC. |
| Piper campii Yunck. |
| Piper canavillosum Steyerm. |
| Piper candollei Sodiro |
| Piper canescenticaule Trel. |
| Piper caninum Blume |
| Piper capense L.f. |
| Piper capillipes Trel. & Yunck. |
| Piper capillistipes Trel. |
| Piper capitarianum Yunck. |
| Piper caracasanum Bredem. ex Link |
| Piper cararense Trel. & Yunck. |
| Piper carpinifolium (C. Presl) C. DC. |
| Piper carpinteranum C. DC. |
| Piper carpunya Ruiz & Pav. |
| Piper carrapanum Trel. |
| Piper carrilloanum C.DC. |
| Piper casapiense (Miq.) C. DC. |
| Piper cassinoides Opiz |
| Piper cathayanum M.G. Gilbert & N.H. Xia |
| Piper cativalense Trel. |
| Piper caucaense Yunck. |
| Piper cavendishioides Trel. & Yunck. |
| Piper celer Trel. |
| Piper celsum Trel. |
| Piper celtidiforme Opiz |
| Piper cenocladum C. DC. |
| Piper ceramicum (Miq.) C. DC. |
| Piper cernuum Vell. |
| Piper cernuum var. araguense (Trel. & Yunck.) Steyerm. |
| Piper cernuum var. perlongispicum (Yunck.) Steyerm. |
| Piper cerronianum Steyerm. |
| Piper chalhuapuquianum Trel. |
| Piper chamissonis Steud. |
| Piper chanchamayanum Trel. |
| Piper changuinolanum Trel. |
| Piper chaudocanum C. DC. |
| Piper chavicoide (Miq.) C. DC. |
| Piper chimborazoense Yunck. |
| Piper chinantlense M. Martens & Galeotti |
| Piper chinense Miq. |
| Piper chromatolepis Trel. |
| Piper chrysoneurum Trel. |
| Piper chrysostachyum C. DC. |
| Piper churumayu Ruiz & Pav. |
| Piper cililimbum Yunck. |
| Piper cinereum C. DC. |
| Piper cingens C. DC. |
| Piper ciniflonis Trel. |
| Piper cirratum Trel. |
| Piper cispontinum Trel. |
| Piper clathratum C. DC. |
| Piper claudii C. DC. |
| Piper claussenianum (Miq.) C. DC. |
| Piper clusii (Miq.) C. DC. |
| Piper coccoloboides (Kunth) Kunth ex C. DC. |
| Piper coeloneurum Diels |
| Piper coilostachyum C. DC. |
| Piper colipanum C. DC. |
| Piper colon-insulae Trel. |
| Piper colonense C. DC. |
| Piper comasense Trel. |
| Piper commutatum Steud. |
| Piper concretiflorum C. DC. |
| Piper conditum Trel. |
| Piper confertinodum (Trel. & Yunck.) M.A. Jaram. & Callejas |
| Piper conispicum Trel. |
| Piper consanguineum (Kunth) Steud. |
| Piper constipatispicum Trel. |
| Piper controversum Steud. |
| Piper corcovadensis (Miq.) C. DC. |
| Piper cordatum C. DC. |
| Piper cordiforme Steyerm. |
| Piper cordilimbum C. DC. |
| Piper cordillerianum C. DC. |
| Piper cordovanum C. DC. |
| Piper cordulatum C. DC. |
| Piper corintoananum Yunck. |
| Piper cornifolium Kunth |
| Piper corrugatum Kuntze |
| Piper coruscans Kunth |
| Piper corylistachyon (Miq.) C. DC. |
| Piper costatum C. DC. |
| Piper cowanii (Yunck.) Yunck. |
| Piper crassinervium Kunth |
| Piper crassinervium var. crassinervium |
| Piper crassispicatum Opiz |
| Piper crassistilum Yunck. |
| Piper crebrinodum C.DC. |
| Piper crenulatum Steyerm. |
| Piper crocatum Ruiz & Pav. |
| Piper cryptopodon C. DC. |
| Piper cumanense Kunth |
| Piper cumaralense C.DC. |
| Piper cumbasonum C. DC. |
| Piper cumbotianum C.DC. |
| Piper cuniculorum Trel. & Yunck. |
| Piper curtirachis W.C. Burger |
| Piper curtispicum C. DC. |
| Piper curvatum Ruiz & Pav. |
| Piper cuspidilimbum C. DC. |
| Piper cuspidispicum Trel. |
| Piper cutucuense Yunck. |
| Piper cuyunianum Steyerm. |
| Piper cyphophyllopse Trel. & Yunck. |
| Piper cyrtopodon C. DC. |
| Piper daedalum Trel. |
| Piper daguanum C. DC. |
| Piper damiaoshanense Y.Q. Tseng |
| Piper darienense C.DC. |
| Piper dasyoura (Miq.) C. DC. |
| Piper dasypodum (Miq.) C. DC. |
| Piper davidsonii Yunck. |
| Piper decipiens (Miq.) C. DC. |
| Piper decurrens C. DC. |
| Piper deductum Trel. |
| Piper deliciasanum Steyerm. |
| Piper delineatum Trel. |
| Piper demeraranum (Miq.) C.DC. |
| Piper demoratum Trel. |
| Piper dennisii Trel. |
| Piper densiciliatum Yunck. |
| Piper deppeanum (Schltdl. & Cham.) D. Dietr. |
| Piper descourtilsianum C. DC. |
| Piper desultorium Trel. |
| Piper dichotomum Ruiz & Pav. |
| Piper diffamatum Trel. & Yunck. |
| Piper diffundum Yunck. |
| Piper dilatatum Rich. |
| Piper dilatatum f. dilatatum |
| Piper dilatatum f. guayranum Steyerm. |
| Piper dimetrale C. DC. |
| Piper diospyrifolium (Kunth) Kunth ex C. DC. |
| Piper disjunctum C. DC. |
| Piper disparipilum C. DC. |
| Piper distigmatum Yunck. |
| Piper divaricatum G.Mey. |
| Piper divergens (C. Presl) C. DC. |
| Piper diversifolium (Kunth) Poir. |
| Piper diversipilum Trel. |
| Piper divulgatum Trel. & Yunck. |
| Piper dodsonii Yunck. |
| Piper dogotense C. DC. |
| Piper dolichostachyum M.G. Gilbert & N.H. Xia |
| Piper dolichotrichum Yunck. |
| Piper dotanum Trel. |
| Piper dryadum C. DC. |
| Piper dukei Yunck. |
| Piper dulce Trel. |
| Piper dumosum Rudge |
| Piper dunstervilleorum Steyerm. |
| Piper durvilleanum Trel. |
| Piper ecallosum Trel. |
| Piper echinocaule Yunck. |
| Piper ecuadorense Sodiro |
| Piper edurum Trel. |
| Piper el-bancoanum Trel. & Yunck. |
| Piper el-paramoense Yunck. |
| Piper emmerichianum Yunck. |
| Piper emygdioi Yunck. |
| Piper enckeaespicum (Trel. & Yunck.) Callejas |
| Piper endlicherianum Trel. |
| Piper enenyasense Trel. |
| Piper enganyanum Trel. & Yunck. |
| Piper entradense Trel. & Yunck. |
| Piper epigynium C. DC. |
| Piper epunctatum Trel. |
| Piper eriocladum Sodiro |
| Piper eriopodon (Miq.) C.DC. |
| Piper erubescentispicum Trel. |
| Piper escaleranum C. DC. |
| Piper eucalyptifolium Rudge |
| Piper eustylum Diels |
| Piper evingeri Yunck. |
| Piper excavatum Ruiz & Pav. |
| Piper excessum Trel. |
| Piper exiguicaule Yunck. |
| Piper expolitum Trel. |
| Piper externum Trel. |
| Piper factum Trel. |
| Piper faecatum Trel. |
| Piper fagifolium Trel. |
| Piper falanense Trel. & Yunck. |
| Piper falcispicum Yunck. |
| Piper falculispicum Trel. & Yunck. |
| Piper fallenii A.H. Gentry |
| Piper ferreyrae Yunck. |
| Piper filistilum C. DC. |
| Piper fimbriulatum C. DC. |
| Piper firmum (Miq.) C. DC. |
| Piper flagellicuspe Trel. & Yunck. |
| Piper flavidum C. DC. |
| Piper flaviflorum C. DC. |
| Piper flavoviride C.DC. |
| Piper flexicaule C. DC. |
| Piper flongatum Vahl |
| Piper fluminense C. DC. |
| Piper fockei Trel. & Yunck. |
| Piper formosum (Miq.) C. DC. |
| Piper fortalezanum Trel. |
| Piper fortunaense Tebbs |
| Piper fortunyoanum Trel. |
| Piper foveolatum Kunth ex C.DC. |
| Piper fragile Benth. |
| Piper francovilleanum C.DC. |
| Piper fulgentifolium Yunck. |
| Piper fuligineum Kunth |
| Piper fuliginosum Sodiro |
| Piper fulvescenticaule Trel. |
| Piper fundacionense Steyerm. |
| Piper fuscispicum Trel. |
| Piper futuri Trel. & Yunck. |
| Piper gabrielianum (Miq.) C. DC. |
| Piper galeatum (Miq.) C. DC. |
| Piper galeottianum M. Martens & Galeotti |
| Piper galicianum Steyerm. |
| Piper garagaranum C. DC. |
| Piper gaudichaudianum Kunth |
| Piper gentryi Steyerm. |
| Piper gibbosum C. DC. |
| Piper gilvescens Trel. |
| Piper gilvibaccum Trel. |
| Piper giordanoi E.F.Guim. & D.Monteiro |
| Piper glabratum (Kunth) Steud. |
| Piper glabrescens (Miq.) C.DC. |
| Piper glabrescens var. caparonum (C. DC.) Yunck. |
| Piper glabrescens var. venezuelense (C.DC.) Trel. & Yunck. |
| Piper glabribaccum Trel. |
| Piper glabrius Trel. |
| Piper glanduligerum C.DC. |
| Piper gonocarpum Trel. |
| Piper gracile Ruiz & Pav. |
| Piper grande Vahl |
| Piper granuligerum Trel. |
| Piper granulosum Ruiz & Pav. |
| Piper gratum Trel. |
| Piper griseocaule Trel. |
| Piper griseum C. DC. |
| Piper guacimonum (C. DC.) Trel. |
| Piper gualeanum C. DC. |
| Piper guatopoense Yunck. |
| Piper guianense (Klotzsch) C.DC. |
| Piper guineense Schumach. & Thonn. |
| Piper hainanense Hemsl. |
| Piper halesiaefolium (Miq.) Kunth ex C. DC. |
| Piper hancei Maxim. |
| Piper harlingii Yunck. |
| Piper hartwegianum (Benth.) C. DC. |
| Piper hassleri C.DC. |
| Piper hatschbachii Yunck. |
| Piper haughtii Trel. & Yunck. |
| Piper hebetifolium W.C. Burger |
| Piper hederaceum (Miq.) C. DC. |
| Piper hemmendorffii C. DC. |
| Piper heptandrum (Miq.) C. DC. |
| Piper hermannii Trel. & Yunck. |
| Piper herrerae Trel. |
| Piper heterobracteum Steyerm. |
| Piper heterocarpum Trel. |
| Piper heterophyllum Ruiz & Pav. |
| Piper heterotrichum C. DC. |
| Piper hieronymi C. DC. |
| Piper hieronymi var. hieronymi |
| Piper hillianum C. DC. |
| Piper hippocrepiforme Steyerm. |
| Piper hirtellipetiolum C. DC. |
| Piper hirtellipetiolum var. harveyanum (Trel.) Yunck. |
| Piper hirtellipetiolum var. tapianum (Trel.) Yunck. |
| Piper hirtulum (C. Presl) C. DC. |
| Piper hispidum Sw. |
| Piper hispidum var. hispidum |
| Piper hispidum f. lanceolatum Steyerm. |
| Piper hochiense Y.Q. Tseng |
| Piper holdridgeanum W.C. Burger |
| Piper holtii Trel. & Yunck. |
| Piper holtonii C.DC. |
| Piper hongkongense C. DC. |
| Piper hooglandii (I. Hutton & P.S. Green) M.A. Jaram. |
| Piper hookerianum (Miq.) C. DC. |
| Piper hostmannianum (Miq.) C.DC. |
| Piper huacachianum Trel. |
| Piper huacapistanum Trel. |
| Piper huallaganum Trel. |
| Piper huegelianum (Miq.) C. DC. |
| Piper huigranum Trel. & Yunck. |
| Piper humistratum Görts & K.U. Kramer |
| Piper hydrolapathum C. DC. |
| Piper hylebates C. DC. |
| Piper hylophilum C. DC. |
| Piper hymenopodum Sodiro |
| Piper hypoleucum Sodiro |
| Piper illautum Trel. |
| Piper immite Trel. |
| Piper immutatum Trel. |
| Piper imperiale (Miq.) C. DC. |
| Piper inauspicatum Trel. |
| Piper inclemens Trel. & Yunck. |
| Piper incomptum Trel. |
| Piper indecorum Kunth |
| Piper indianonum Trel. |
| Piper indiciflexum Trel. |
| Piper infossibaccatum A. Huang |
| Piper infossum Y.Q. Tseng |
| Piper insectifugum C.DC. ex Seem. |
| Piper insigne (Kunth) Kunth ex C. DC. |
| Piper interitum Trel. |
| Piper interruptum Opiz |
| Piper intonsum Trel. |
| Piper iquitosense Trel. |
| Piper itayanum Trel. |
| Piper jacquemontianum Kunth |
| Piper jalapense M. Martens & Galeotti |
| Piper jalapensis (Miq.) C. DC. |
| Piper japurense (Miq.) C. DC. |
| Piper jauaense Steyerm. |
| Piper javitense Kunth |
| Piper julianii Callejas |
| Piper jussiaeanum (Kunth) Kunth ex C. DC. |
| Piper kadsura (Choisy) Ohwi |
| Piper kanehiranum Trel. |
| Piper kappleri C. DC. |
| Piper karwinskianum (Kunth) Kunth ex C. DC. |
| Piper kawakamii Hayata |
| Piper kegelianum (Miq.) C.DC. |
| Piper kegelii C. DC. |
| Piper kimpitirikianum Trel. |
| Piper kleinii Yunck. |
| Piper klotzschianum (Kunth) C. DC. |
| Piper klugianum Trel. |
| Piper klugii Yunck. |
| Piper kunthii (Miq.) C. DC. |
| Piper kwashoense Hayata |
| Piper lacunosum Kunth |
| Piper laetispicum C. DC. |
| Piper laetum (Kunth) C. DC. |
| Piper laevicarpum Yunck. |
| Piper laevigatum Kunth |
| Piper lagenaebaccum Trel. |
| Piper laguna-cochanum Trel. & Yunck. |
| Piper lamasense Trel. |
| Piper lanceaefolium Kunth |
| Piper lanceolatum Ruiz & Pav. |
| Piper lancilimbum Yunck. |
| Piper lanosicaule Trel. |
| Piper lapathifolium (Kunth) Steud. |
| Piper late-ovatum Trel. |
| Piper lateripilosum Yunck. |
| Piper latibracteum C. DC. |
| Piper latifolium L. f. |
| Piper laurinum Roem. & Schult. |
| Piper lechlerianum C. DC. |
| Piper lehmannianum (Miq.) C. DC. |
| Piper lemaense Yunck. |
| Piper lepturum (Kunth) C. DC. |
| Piper leticianum C. DC. |
| Piper leucophaeocaule Trel. |
| Piper leucophaeum Trel. |
| Piper leucophyllum (Miq.) C. DC. |
| Piper lhotzkyanum Kunth |
| Piper liebmannii C. DC. |
| Piper liesneri Steyerm. |
| Piper limae Yunck. |
| Piper limosum Yunck. |
| Piper lindenii (Miq.) C. DC. |
| Piper lineatipilosum Yunck. |
| Piper lineatum Ruiz & Pav. |
| Piper lineatum var. lineatum |
| Piper lineolatifolium Trel. & Yunck. |
| Piper lingshuiense Y.Q. Tseng |
| Piper linguliforme Steyerm. |
| Piper littorale C. DC. |
| Piper llatanum Trel. |
| Piper loefgrenii Yunck. |
| Piper longeacuminatum Trel. |
| Piper longepetiolatum (C. DC.) Trel. |
| Piper longepilosum C. DC. |
| Piper longestamineum Trel. |
| Piper longestylosum C. DC. |
| Piper longiappendiculatum Steyerm. |
| Piper longicaudatum Trel. & Yunck. |
| Piper longifolium Ruiz & Pav. |
| Piper longispicum C.DC. |
| Piper longispicum var. glabratum (Yunck.) Steyerm. |
| Piper longum L. |
| Piper loretoanum Trel. |
| Piper lucigaudens C. DC. |
| Piper lucigaudens var. alleni (Trel.) Yunck. |
| Piper lundii C.DC. |
| Piper lunulibracteatum C. DC. |
| Piper macbrideanum Trel. |
| Piper macedoi Yunck. |
| Piper macerispicum Trel. & Yunck. |
| Piper machupicchuense Trel. |
| Piper macropiper Pennant |
| Piper macropodum C. DC. |
| Piper macrorhynchon (Miq.) C. DC. |
| Piper macrostachyum (C. Presl) C. DC. |
| Piper macrotrichum C. DC. |
| Piper madagascariensis (Miq.) C. DC. |
| Piper magnantherum C. DC. |
| Piper magnificum Trel. |
| Piper majusculum Blume |
| Piper malacophyllum (C.Presl) C.DC. |
| Piper malifolium Trel. |
| Piper manabinum C. DC. |
| Piper mansericheanum Trel. |
| Piper mapirense C. DC. |
| Piper maranyonense Trel. |
| Piper marequitense C. DC. |
| Piper margaritatum Trel. |
| Piper marginatum Jacq. |
| Piper marginatum f. catalpaefolium (Kunth) Steyerm. |
| Piper marginatum var. marginatum |
| Piper marginatum var. niceforoi (Trel. & Yunck.) Steyerm. |
| Piper marsupiiferum Trel. |
| Piper martensianum C. DC. |
| Piper martianum (Kunth) Kunth ex C. DC. |
| Piper martinense Trel. |
| Piper marturetense Trel. & Yunck. |
| Piper mathewsii C. DC. |
| Piper maxonii C. DC. |
| Piper mazamariense Yunck. |
| Piper mediocre C. DC. |
| Piper melanocladum C. DC. |
| Piper melanostictum (Miq.) C. DC. |
| Piper melastomoides Schltdl. & Cham. |
| Piper melchior (Sykes) M.A. Jaram. |
| Piper mellibracteaum Trel. |
| Piper mendezense Yunck. |
| Piper mercedense Trel. |
| Piper metanum Trel. & Yunck. |
| Piper metapalcoensis C. DC. |
| Piper mexiae Trel. & Yunck. |
| Piper mexicanum (Miq.) DC. |
| Piper michelianum C. DC. |
| Piper microstigma (Miq.) C. DC. |
| Piper miersinum (Miq.) C. DC. |
| Piper mikaniaefolium Trel. |
| Piper mikanianum (Kunth) Steud. |
| Piper mikanianum var. pilosius C. DC. |
| Piper millegranum Yunck. |
| Piper minasarum Steyerm. |
| Piper miniatum (Miq.) Blume |
| Piper miniatum var. hirtellum (Miq.) C. DC. |
| Piper minute-scabiosum Trel. |
| Piper miquelianum C.DC. |
| Piper misantlense C. DC. |
| Piper mischocarpum Y.Q. Tseng |
| Piper mishuyacuense Trel. |
| Piper mite Ruiz & Pav. |
| Piper mitifolium Trel. |
| Piper mituense Trel. & Yunck. |
| Piper moccomocco Trel. |
| Piper modestum (Miq.) C. DC. |
| Piper mohomoho C. DC. |
| Piper mollicomum (Kunth) Steud. |
| Piper molliusculum Sodiro |
| Piper monagasense Yunck. |
| Piper monostigmum C. DC. |
| Piper montanum C. DC. |
| Piper montealegreanum Yunck. |
| Piper monurum Trel. & Yunck. |
| Piper monzonense C. DC. |
| Piper morilloi Steyerm. |
| Piper morisonianum C.DC. |
| Piper mosaicum Steyerm. |
| Piper moscopanense Yunck. |
| Piper mosenii C. DC. |
| Piper moyobambanum Trel. |
| Piper muelleri C. DC. |
| Piper mullesua Buch.-Ham. ex D. Don |
| Piper multimammosum Trel. |
| Piper multiplinervium C.DC. |
| Piper multitudinis Trel. |
| Piper munchanum C.DC. |
| Piper mundum Trel. |
| Piper munyanum Trel. |
| Piper musteum Trel. |
| Piper mutabile C. DC. |
| Piper nanayanum Trel. |
| Piper napo-pastazanum Trel. & Yunck. |
| Piper nasutum Trel. |
| Piper neblinanum Yunck. |
| Piper nebuligaudens Yunck. |
| Piper neesianum C. DC. |
| Piper neglectum Trel. |
| Piper nematanthera C. DC. |
| Piper nematanthera var. sagotii (C. DC.) Trel. & Yunck. |
| Piper nigropunctatum C. DC. |
| Piper nigrum L. |
| Piper nobile C.DC. |
| Piper nubigenum Kunth |
| Piper nudibaccatum Y.Q. Tseng |
| Piper nudifolium C. DC. |
| Piper nudilimbum C. DC. |
| Piper nudum C. DC. |
| Piper nuncupatum Trel. |
| Piper oaxacanum C. DC. |
| Piper obesum Vahl |
| Piper oblancifolium Yunck. |
| Piper obliquum Ruiz & Pav. |
| Piper oblongatifolium Trel. |
| Piper oblongatilimbum Trel. |
| Piper oblongatum Opiz |
| Piper oblongifolium (Klotzsch) C. DC. |
| Piper oblongum Kunth |
| Piper obovatifolium Trel. |
| Piper obtusilimbum C. DC. |
| Piper oculatispicum Trel. |
| Piper offensum Trel. |
| Piper ollantaitambanum Trel. |
| Piper opizianum Fuernr. |
| Piper opizii (Kunth) Steud. |
| Piper oradendron Trel. & Standl. |
| Piper orizabanum C. DC. |
| Piper ornithorhynchum Trel. |
| Piper oroense Yunck. |
| Piper ostii Trel. |
| Piper otophorum C. DC. |
| Piper otto-huberi Steyerm. |
| Piper ottoniifolium C. DC. |
| Piper ovantherum C. DC. |
| Piper ovatum Vahl |
| Piper pachoanum C. DC. |
| Piper padifolium (Kunth) C. DC. |
| Piper paganicum Trel. |
| Piper palestinanum Trel. & Yunck. |
| Piper pallididorsum Trel. |
| Piper paludosum C. DC. |
| Piper papillicaule Trel. & Yunck. |
| Piper papilliferum Steyerm. |
| Piper paraense (Miq.) C. DC. |
| Piper paraisense Trel. |
| Piper paralaevigatum Trel. |
| Piper paramaribense C. DC. |
| Piper paranum Yunck. |
| Piper parapeltobryon Trel. |
| Piper parcum Trel. & Yunck. |
| Piper parianum Yunck. |
| Piper parmatum Dressler |
| Piper parvicordulatum Trel. |
| Piper pastasanum Diels |
| Piper patens Opiz |
| Piper patentifolium Trel. |
| Piper paucartamboanum Trel. |
| Piper paulianifolium Trel. |
| Piper pavonii (Miq.) C.DC. |
| Piper pebasense Trel. |
| Piper pedicellatum C. DC. |
| Piper pedunculare (Miq.) C. DC. |
| Piper pellitum C. DC. |
| Piper peltatum L. |
| Piper penangense (Miq.) C. DC. |
| Piper pendentispicum Trel. & Yunck. |
| Piper pendentispicum var. furcatipilosum (Yunck.) Steyerm. |
| Piper pendulirameum Trel. & Yunck. |
| Piper peracuminatum C. DC. |
| Piper perareolatum C. DC. |
| Piper perbrevicaule Yunck. |
| Piper perciliatum Trel. & Yunck. |
| Piper perenense Trel. |
| Piper perhispidum C. DC. |
| Piper perijaense Steyerm. |
| Piper permolle Trel. & Yunck. |
| Piper pernigricans Trel. |
| Piper perpunctulatum Trel. |
| Piper perpurgatum Trel. |
| Piper perstipulare Steyerm. |
| Piper perstrigosum Yunck. |
| Piper persubulatum C. DC. |
| Piper pertinax Trel. & Yunck. |
| Piper peruligerum Trel. |
| Piper peruvianum (Miq.) C. DC. |
| Piper pervelutinum Trel. |
| Piper pervenosum C. DC. ex L.J. Schroeder |
| Piper perverrucosum Trel. & Yunck. |
| Piper pervulgatum Trel. |
| Piper philippinum Miq. |
| Piper photomorphe C. DC. |
| Piper phyllostictum (Miq.) C. DC. |
| Piper phytolaccifolium Opiz |
| Piper phytolaccifolium var. carabobense (C.DC.) Steyerm. |
| Piper pilgeri C.DC. |
| Piper pilosissimum Yunck. |
| Piper pilovarium Yunck. |
| Piper piluliferum Kunth |
| Piper pinedoana Trel. |
| Piper pingbienense Y.Q. Tseng |
| Piper pinguifolium C. DC. |
| Piper pinoganense Trel. |
| Piper piojoanum Trel. & Yunck. |
| Piper piscatorum Trel. & Yunck. |
| Piper pittieri C. DC. |
| Piper planipes Trel. |
| Piper platylobum Sodiro |
| Piper platyphyllum (Benth.) C. DC. |
| Piper pleiocarpum C.C. Chang ex Y.Q. Tseng |
| Piper plurinervosum Yunck. |
| Piper poasanum C. DC. |
| Piper pohlianum (Miq.) C. DC. |
| Piper politaereum Trel. |
| Piper politii Yunck. |
| Piper politum C. DC. |
| Piper polysyphonum C. DC. |
| Piper ponesheense C. DC. |
| Piper ponganum Trel. |
| Piper pontis Trel. |
| Piper popayanense C. DC. |
| Piper poporense Trel. & Yunck. |
| Piper populifolium (Kunth) Kunth ex C. DC. |
| Piper porveniricola Trel. |
| Piper poscitum Trel. & Yunck. |
| Piper positum Trel. |
| Piper posusanum Trel. |
| Piper pothifolium (Kunth) Kunth ex C. DC. |
| Piper pothomorphe (Miq.) C. DC. |
| Piper pothophyllum Trel. |
| Piper prietoi Yunck. |
| Piper procerum Trel. |
| Piper prunifolium J.Jacq. |
| Piper prunifolium var. carboneranum (Yunck.) Steyerm. |
| Piper prunifolium var. prunifolium |
| Piper pseudoacreanum Steyerm. |
| Piper pseudoaequale Steyerm. |
| Piper pseudoarboreum Yunck. |
| Piper pseudoasperifolium C. DC. |
| Piper pseudobarbatum C. DC. |
| Piper pseudobredemeyeri Steyerm. |
| Piper pseudocallosum Trel. |
| Piper pseudocativalense Trel. |
| Piper pseudodivulgatum Steyerm. |
| Piper pseudoeucalyptifolium Trel. & Yunck. |
| Piper pseudoflexuosum Trel. |
| Piper pseudogaragaranum Trel. |
| Piper pseudoglabrescens Trel. & Yunck. |
| Piper pseudohastularum Steyerm. |
| Piper pseudolindenii C. DC. |
| Piper pseudomatico Trel. |
| Piper pseudomollicomum C. DC. |
| Piper pseudomollicomum var. pseudomollicomum |
| Piper pseudomunchanum Trel. |
| Piper pseudoperuvianum C. DC. |
| Piper psilophyllum C. DC. |
| Piper psilorhachis C. DC. |
| Piper psilostachyum Kunth |
| Piper pterocladum C. DC. |
| Piper pteropoda (Moric.) C. DC. |
| Piper puberulescens Trel. |
| Piper puberuliciliatum Yunck. |
| Piper puberulilimbum C. DC. |
| Piper puberulinerve C. DC. |
| Piper pubibaccum C. DC. |
| Piper pubicatulum C. DC. |
| Piper pubinervulum C. DC. |
| Piper pubistipulum C. DC. |
| Piper pubivaginatum Steyerm. |
| Piper pullispicum Trel. |
| Piper puniceum Trel. |
| Piper puraceanum Trel. & Yunck. |
| Piper puyoense Yunck. |
| Piper pygmaeum Yunck. |
| Piper pyrifolium Vahl |
| Piper quimirianum Trel. |
| Piper quitense C. DC. |
| Piper rafflesii (Miq.) C. DC. |
| Piper rarum C.DC. |
| Piper rasile Trel. |
| Piper recensitum Trel. |
| Piper recreoense Trel. |
| Piper redactum Trel. |
| Piper reductipes Trel. |
| Piper regale C. DC. |
| Piper regnellii (Miq.) C.DC. |
| Piper reinwardtianum (Miq.) C. DC. |
| Piper reitzii Yunck. |
| Piper relaxatum Trel. |
| Piper renitens (Miq.) Yunck. |
| Piper reptabundum C. DC. |
| Piper resalutatum Trel. |
| Piper restio Trel. |
| Piper restrictum Trel. |
| Piper reticulatum L. |
| Piper reticulatum var. reticulatum |
| Piper retrofractum Vahl |
| Piper rhinostachyum Trel. |
| Piper rhododendrifolium Kunth |
| Piper rhytidocarpum Hook. f. |
| Piper richardiifolium (Kunth) Kunth ex C. DC. |
| Piper riitosense Trel. & Yunck. |
| Piper rio-zulianum Trel. & Yunck. |
| Piper rioense Yunck. |
| Piper riojanum Trel. |
| Piper rivinoides (Kunth) C. DC. |
| Piper rivinoides f. magnifolium Yunck. |
| Piper robustipedunculum Yunck. |
| Piper ronaldii Steyerm. |
| Piper roqueanum Trel. |
| Piper rosei C. DC. |
| Piper rubiginosum Trel. |
| Piper rubribaccum Trel. |
| Piper rubrum C. DC. |
| Piper rude Kunth |
| Piper rudgeanum (Miq.) C. DC. |
| Piper rufipilum Yunck. |
| Piper rugosibaccum Trel. |
| Piper rugosilimbum Trel. |
| Piper rumicifolium (Miq.) C. DC. |
| Piper rumphii (Miq.) C. DC. |
| Piper rupununianum Trel. & Yunck. |
| Piper rusbyi C. DC. |
| Piper sabanaense Yunck. |
| Piper sagittifer Trel. |
| Piper saldanhae Yunck. |
| Piper salgaranum Trel. & Yunck. |
| Piper salicariaefolium (Miq.) Kunth ex C. DC. |
| Piper salicifolium Vahl |
| Piper saloyanum Trel. & Yunck. |
| Piper sambuanum C. DC. |
| Piper san-luisense Trel. |
| Piper san-vicentense Trel. & Yunck. |
| Piper sancti-felicis Trel. |
| Piper sanctum Miq. |
| Piper sandianum C. DC. |
| Piper sangorianum C. DC. |
| Piper sanmiguelense Trel. & Yunck. |
| Piper sannicolasense Trel. |
| Piper sanramonense Trel. |
| Piper sanroqueanum Trel. |
| Piper santaritanum Trel. |
| Piper sapotoanum Trel. |
| Piper sapotoyacuense Trel. |
| Piper sarmentosum Roxb. |
| Piper satisfactum Trel. |
| Piper scabiosifolium Trel. |
| Piper scabrellum Yunck. |
| Piper scabridulicaule Trel. |
| Piper scalariforme Trel. |
| Piper scalarispicum Trel. |
| Piper scansum Trel. & Yunck. |
| Piper schachii (Miq.) C. DC. |
| Piper schiedeanum Steud. |
| Piper schlechtendahlianum (Miq.) C. DC. |
| Piper schlechtendalii Steud. |
| Piper schlimii C.DC. |
| Piper schottii (Miq.) C. DC. |
| Piper schunkeanum Trel. |
| Piper schuppii A.H. Gentry |
| Piper sciaphilum C. DC. |
| Piper sclerophloeum C.DC. |
| Piper scutaespicum Trel. |
| Piper scutilimbum C. DC. |
| Piper secundum Ruiz & Pav. |
| Piper sellertianum Trel. |
| Piper sellowianum (Kunth) Kunth ex C. DC. |
| Piper semicordulatum Trel. |
| Piper semicrudum Trel. |
| Piper semiimmersum C. DC. |
| Piper seminitidulum Trel. |
| Piper semiplenum Trel. |
| Piper semperflorens C. DC. |
| Piper senporeiense Yamam. |
| Piper septuplinervium (Miq.) C. DC. |
| Piper sericeonervosum Trel. |
| Piper serotinum Trel. |
| Piper serpavillanum Trel. |
| Piper serrulatum Yunck. |
| Piper setigerum Trel. |
| Piper setosum Trel. & Yunck. |
| Piper setulosum Trel. |
| Piper sierra-aroense Steyerm. |
| Piper silvarum C. DC. |
| Piper silvigaudens Yunck. |
| Piper silvivagum C. DC. |
| Piper sintenense Hatus. |
| Piper sinuclausum Trel. |
| Piper sinugaudens C. DC. |
| Piper skutchii Trel. & Yunck. |
| Piper sodiroi C. DC. |
| Piper soledadense Trel. |
| Piper solutidrupum Yunck. |
| Piper sororium (Miq.) C. DC. |
| Piper spruceanum C. DC. |
| Piper squamulosum C. DC. |
| Piper stellipilum (Miq.) C. DC. |
| Piper stenostachys C. DC. |
| Piper stevensii Trel. |
| Piper steyermarkii Yunck. |
| Piper stiliferum Yunck. |
| Piper stipitiforme C.C. Chang ex Y.Q. Tseng |
| Piper stipulaceum Opiz |
| Piper stipulosum Sodiro |
| Piper stomachicum C. DC. |
| Piper storkii Trel. |
| Piper strigillosicaule Trel. |
| Piper strigillosum Trel. |
| Piper strigosum Trel. |
| Piper stuebelii Trel. |
| Piper stupposum A. Dietr. |
| Piper subaduncum Yunck. |
| Piper subalpinum Yunck. |
| Piper subandina Trel. |
| Piper subandinum C. DC. |
| Piper subcaudatum Trel. |
| Piper subcinereum C. DC. |
| Piper subcordatum (Miq.) C. DC. |
| Piper subcordulatum Trel. |
| Piper subduidaense Yunck. |
| Piper subflavicans Trel. |
| Piper subflavispicum C. DC. |
| Piper subflavum C. DC. |
| Piper subflavum var. espejuelanum (C. DC.) Trel. & Yunck. |
| Piper subglabribracteatum C. DC. |
| Piper sublignosum Yunck. |
| Piper submultinerve C. DC. |
| Piper subnitidifolium Yunck. |
| Piper subnitidum C. DC. |
| Piper subpatens Trel. |
| Piper subpedale Trel. & Yunck. |
| Piper subquinquenerve Trel. |
| Piper subrepens Trel. |
| Piper subrugosum Yunck. |
| Piper subscutatum (Miq.) C. DC. |
| Piper subseptemnervium (Miq.) C. DC. |
| Piper subsessilifolium C. DC. |
| Piper subsilvestre C. DC. |
| Piper subsilvulanum C. DC. |
| Piper suffruticosum Trel. |
| Piper suipigua Buch.-Ham. ex D. Don |
| Piper sumatranum (Miq.) C. DC. |
| Piper sumpi Trel. |
| Piper supernum Trel. & Yunck. |
| Piper swartzianum (Miq.) C. DC. |
| Piper sylvaticum Roxb. |
| Piper sylvestre Lam. |
| Piper tabinense Trel. |
| Piper tacariguense Steyerm. |
| Piper tachiranum Yunck. |
| Piper taiwanense Lin & Lu |
| Piper tamayoanum Steyerm. |
| Piper taperanum Yunck. |
| Piper tectoniaefolium (Kunth) Kunth ex C. DC. |
| Piper tecumense Trel. |
| Piper temptum Trel. |
| Piper tenebricosum Trel. |
| Piper tenue Kunth |
| Piper tenuicuspe (Miq.) C. DC. |
| Piper tenuilimbum C. DC. |
| Piper tenuimucronatum C. DC. |
| Piper tepuiense Steyerm. |
| Piper terrabanum C. DC. |
| Piper tessmanni Trel. |
| Piper teysmanii (Miq.) C. DC. |
| Piper thomsonii (C. DC.) Hook. f. |
| Piper thomsonii var. thomsonii |
| Piper timbuchianum Trel. |
| Piper tocacheanum C. DC. |
| Piper tonduzii C. DC. |
| Piper toronotepuiense Steyerm. |
| Piper tortivenulosum Yunck. |
| Piper tortivenulosum f. glabrum (Yunck.) Steyerm. |
| Piper tortivenulosum f. tortivenulosum |
| Piper tortuosivenosum Trel. |
| Piper tovarense Trel. & Yunck. |
| Piper townsendii C. DC. |
| Piper trachyphyllum C. DC. |
| Piper translucens Yunck. |
| Piper transpontinum Trel. |
| Piper trianae C. DC. |
| Piper trichocarpon C.DC. |
| Piper trichoneuron (Miq.) C. DC. |
| Piper trichorhachis C. DC. |
| Piper trichostachyon (Miq.) C. DC. |
| Piper trichostylopse Trel. |
| Piper trichostylum C. DC. |
| Piper tricolor Y.Q. Tseng |
| Piper tricuspe (Miq.) C. DC. |
| Piper tridentipilum C. DC. |
| Piper trigonum C.DC. |
| Piper tristemon C.DC. |
| Piper tristigmum Trel. |
| Piper truman-yunckeri Callejas |
| Piper truncatum Vell. |
| Piper tsangyuanense P.S. Chen & P.C. Zhu |
| Piper tsengianum M.G. Gilbert & N.H. Xia |
| Piper tuberculatum Jacq. |
| Piper tucumanum C. DC. |
| Piper tuerckheimii C. DC. |
| Piper tumidum Kunth |
| Piper ucayalianum Trel. |
| Piper uhdei C. DC. |
| Piper ulceratum Trel. |
| Piper ulei C. DC. |
| Piper umbellatum L. |
| Piper umbricola C. DC. |
| Piper umbriense Trel. & Yunck. |
| Piper unguiculatum Ruiz & Pav. |
| Piper urophyllum C. DC. |
| Piper urostachyum Hemsl. |
| Piper urubambanum Trel. |
| Piper valladolidense Yunck. |
| Piper variegatum (Ruiz & Pav.) Pers. |
| Piper variifolium (Miq.) C. DC. |
| Piper velutininervosum Trel. |
| Piper velutinovarium C. DC. |
| Piper velutinum Kunth |
| Piper venamoense Steyerm. |
| Piper veneralense Trel. & Yunck. |
| Piper venosum (Miq.) C. DC. |
| Piper venulosissimum Yunck. |
| Piper veraguense C.DC. |
| Piper verbascifolium (Miq.) C. DC. |
| Piper veredianum Trel. |
| Piper verruculaecaule Trel. |
| Piper verruculaefolium Trel. |
| Piper verruculosum C. DC. |
| Piper via-chicoense Yunck. |
| Piper villiramulum C. DC. |
| Piper villiramulum var. villiramulum C. DC. |
| Piper villosispicum Trel. |
| Piper viminifolium Trel. |
| Piper virgultorum C. DC. |
| Piper viridicaule Trel. |
| Piper viridilimbum Trel. |
| Piper viridistachyum Yunck. |
| Piper vitaceum Yunck. |
| Piper volubile C. DC. |
| Piper wachenheimii Trel. |
| Piper wagneri C. DC. |
| Piper wallichii (Miq.) Hand.-Mazz. |
| Piper wangii M.G. Gilbert & N.H. Xia |
| Piper wibomii Yunck. |
| Piper wingfieldii Steyerm. |
| Piper woytkowskii Yunck. |
| Piper wydlerianum C. DC. |
| Piper xalapense C. DC. |
| Piper xanthostachyum C. DC. |
| Piper xylosteoides (Kunth) Steud. |
| Piper xylosteoides var. subauriculatum (Miq.) Yunck. |
| Piper yananoanum Trel. |
| Piper yaracuyense Yunck. |
| Piper yessupianum Trel. |
| Piper yinkiangense Y.Q. Tseng |
| Piper yucatanense C. DC. |
| Piper yui M.G. Gilbert & N.H. Xia |
| Piper yunnanense Y.Q. Tseng |
| Piper yzabalanum C. DC. |
| Piper zacatense C. DC. |
| Piper zarumanum Trel. |