| Geographical names | Botanical scientific names | Biblical names | Nicknames | Institution names |
| Historical names | Zoological scientific names | Fictitious names | Pseudonyms |
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| Scientific Name | Malagasy Name |
| Ilex mitis | hazondrano, kamasina, lampivahitry, lampivato, lapivahatra, manofotrakoho, monofotrakoho, nofotrakoho, talate, timpantrozona, tsialefitra, tsimendretsa, tsimidretra, tsimidretsa, tsimitety, tsimitretra, valolahy |
| Ilysanthes sp. | voanjomangamadinikantanety |
| Impatiens andringitrensis | kivolavola |
| Impatiens balsamina | benjamina |
| Impatiens baronii | kivolavola |
| Impatiens decaryana | kivolavola |
| Impatiens firmula | kivolavola, rangikely, silamorindrano |
| Impatiens humbertii | kivolavola |
| Impatiens ivohibensis | kivolavola |
| Impatiens justicioides | kivolavola |
| Impatiens lantziana | kivolavola |
| Impatiens lyallii | kivolavavy, rangy |
| Impatiens majungensis | moramaitso |
| Impatiens noli-tangere | benjamina |
| Impatiens peperomioides | kivolavola |
| Impatiens salicifolia | voahangindrano |
| Impatiens sp. | tsipihipina |
| Impatiens spathulifera | kivolavola |
| Impatiens sultanii | benjamina, kivolavavy |
| Imperata cylindrica | antsoro, fakatenina, fehana, manevika, saingona, tenina, tenona, tsevoka |
| Indigofera anil | aika, engitra, hengitra |
| Indigofera bojeri | kiramena |
| Indigofera cloiselii | hazomboatango, taolanomby |
| Indigofera compressa | fafalahy, manjola |
| Indigofera depauperata | fafalahy, hazomby, maintempo, maintifo, titinjaza |
| Indigofera erecta | aika, engitra |
| Indigofera glabra | aikalahy, fatrabahatra |
| Indigofera hirsuta | engitratainakoho, famafasambo, patry, takotsifotra, tsiasotry |
| Indigofera incana | aikaberavina |
| Indigofera leucoclada | malemiravina |
| Indigofera longiracemosa | aikamanga |
| Indigofera lyallii | aikafatray, aikamena, fanamolahy, sariaky |
| Indigofera mimosella | kiotsiotsitanilahy |
| Indigofera pedunculata | aikaberavina, aikamanga, beravina, mangataho, tapitsakondry |
| Indigofera perrieri | hazomby |
| Indigofera sp. | hazombohabe, remote, tsingilofilo, zavilo |
| Indigofera stenopetala | kiotsiotsitanivavy |
| Indigofera suffruticosa | aika, engitra, hengitra |
| Indigofera thymoides | tsimaitompangady |
| Indigofera tinctoria | aika, angitra, engitra, fangira, fatotra, hengitra, kitsakitsa, lefitra, netsy, tapisakondry |
| Intsia bijuga | intsy |
| Inula perrieri | fanefitsa, lelanomby, salakanimpampihosy |
| Inula speciosa | fanefitra, lelanomby, parakinandrongo, salakanimpampihosy |
| Iodes madagascariensis | vahifisaka |
| Ipomea s | kanjo |
| Ipomoea angustifolia | antsarake |
| Ipomoea aquatica | antarika |
| Ipomoea aspera | bokalambitro |
| Ipomoea batatas | ambizo, anantaraona, anantarohana, bageda, bariaho, batata, bege, bela, bele, belena, belity, bemavo, bokala, bolidy, bolody, bonaka, borokay, gogavory, gogika, hoda, ikalamongo, kalafotsy, kalamanja, kalamavo, kalamena, kalamongo, kalandolaña, kalavory, kambara, kambo, kelemena, keliebo, keliladina, kelimena, kelimongo, kirangomena, ladim-bomanga, lohafinjo, mandady, mbizo, ovihazo, ovimanga, ovozao, ovy, rahoda, rahodaka, tanambizo, toñàña, tongotrakoho, tsidinambotofotsy, tsimanga, tsomanga, vihazo, vomanga, vorondro |
| Ipomoea beraviensis | vahindranavavy |
| Ipomoea biloba | vahindalandana |
| Ipomoea desmophylla | kifolona, varangambitsika |
| Ipomoea learii | poranakosy |
| Ipomoea leucantha | ampelantsifotra, ampelasifotra, voafo |
| Ipomoea lindleyi | sarovy, voankelana |
| Ipomoea medium | famehifary |
| Ipomoea nil | vahintsidy |
| Ipomoea palmata | anambararata, anambolotara, ananambararata, kisantsola, vahimporinondry, vahintsatsaka, vahintsatsatra |
| Ipomoea pes-caprae | vahedalanda |
| Ipomoea pescaprae | lalandanjiake |
| Ipomoea pterygocaulos | vahinkelaka |
| Ipomoea purpurea | bahia, kisarisarimbomanga, sarisarimbomanga, sarisarivomanga, tsingovihovy, vahintsidity, vahitsidy, vomanganalika, vomangangoaika, vomangoaika |
| Ipomoea reptans | lalandy |
| Ipomoea sp. | boadoaka, kanja, kimoky, marovelo, moky, tsiotry |
| Ipomoea wightii | ajy, avy, tsingovihovy |
| Iresine lindenii | belohalika |
| Ischaemum rugosum | taimboriky, tsikalabana |
| Isoglossa melleri | ravitsara |
| Isolona ghesquierei | ambary, ambavy |
| Isolona humbertiana | ambery, ambiry, kililo, ombary, roimbary |
| Isolona madagascariensis | ambary, kililo, ombary, ombavy, roimbary, roimbavy |
| Isolona perrieri | robavy |
| Ivodea confertifolia | tsimanotry |
| Ivodea menabeensis | ampoly |
| Ixora cremixora | madosoravy |
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