Mitrasacme pygmaea R.Br. (Synonym : Mitrasacme chinensis Griseb.)

Family : Loganiaceae

Modiola caroliniana (L.) G.Don (Synonym : Modiola reptans A.St.-Hil.)

Family : Malvaceae [Naturalized plant]

Moehringia lateriflora (L.) Fenzl (Synonym : Alsinanthus lateriflorus (L.) Desv.)

Family : Caryophyllaceae

Molinia japonica Hack. (Synonym : Moliniopsis japonica (Hack.) Hayata)

Family : Poaceae

Mollugo verticillata L. (Synonym : Mollugo verticillata L. var. vulgaris Cambess.)

Family : Molluginaceae [Naturalized plant]

Momordica charantia L. (Synonym : Momordica chinensis Hort.)

Family : Cucurbitaceae

Moneses uniflora (L.) A.Gray (Synonym : Monanthium uniflorum (L.) House)

Family : Pyrolaceae

Monochoria korsakowii Regel & Maack (Synonym : Monochoria vaginalis (Burm.f.) C.Presl var. korsakowii (Regel & Maack) Solms)

Family : Pontederiaceae

Monochoria vaginalis (Burm.f.) C.Presl var. plantaginea (Roxb.) Solms (Synonym : Monochoria plantaginea (Roxb.) Kunth)

Family : Pontederiaceae

Monotropa hypopitys L. (Synonym : Monotropa hypopitys L. var. glaberrima H.Hara)

Family : Pyrolaceae