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- Ilex arnhemensis (F.Muell.) Loes.
- Indigofera baileyi F.Muell.
- Indigofera efoliata F.Muell.
- Indigofera haplophylla F.Muell.
- Indigofera pratensis F.Muell.
- Indigofera saxicola F.Muell. ex Benth.
- Indigofera schultziana F.Muell.
- Ipomoea calobra F.Muell.
- Ipomoea racemigera F.Muell. & Tate
- Isoetes elatior F.Muell. ex A.Braun
- Isoetes humilior F.Muell. ex A.Braun
- Isoglossa eranthemoides (F.Muell.) R.M.Barker
- Isopogon crithmifolius F.Muell.
- Isopogon dawsonii F.Muell. ex R.T.Baker
- Isopogon fletcheri F.Muell.
- Isopogon tridens (Meisn.) F.Muell.
- Isotoma fluviatilis (R.Br.) F.Muell. ex Benth.
- Isotoma gulliveri F.Muell.
- Isotoma petraea F.Muell.
- Isotropis atropurpurea F.Muell.
- Isotropis canescens F.Muell.
- Isotropis forrestii F.Muell.
- Isotropis winneckei F.Muell.
- Ixiolaena brevicompta F.Muell.
- Ixiolaena supina F.Muell.
Read more about this topic: List Of Australian Plant Species Authored By Ferdinand Von Mueller