Mentha arvensis L. var. barbata (Nakai) W.T.Lee (Synonym : Mentha haplocalyx Briq. var. barbata Nakai)

Family : Lamiaceae

Mentha arvensis L. var. piperascens Malinv. ex Holmes (Synonym : Mentha canadensis L. var. piperascens f. pilosa (H.Hara) H.Hara)

Family : Lamiaceae

Mentha suaveolens 'Variegata'

Family : Lamiaceae

Menyanthes trifoliata L.

Family : Menyanthaceae

Mercurialis leiocarpa Siebold & Zucc. (Synonym : Mercurialis leiocarpa Siebold & Zucc. var. transmorrisonensis (Hayata) H.Keng)

Family : Euphorbiaceae

Mertensia maritima (L.) Gray subsp. asiatica Takeda (Synonym : Mertensia maritima (L.) Gray var. asiatica (Takeda) S.L.Welsh)

Family : Boraginaceae

Metanarthecium luteoviride Maxim. (Synonym : Aletris luteoviridis (Maxim.) Franch.)

Family : Liliaceae

Metaplexis japonica (Thunb.) Makino (Synonym : Cynanchum rostellatum (Turcz.) Liede & Khanum)

Family : Apocynaceae

Metasequoia glyptostroboides Hu & W.C.Cheng (Synonym : Metasequoia glyptostroboides Hu & W.C.Cheng var. caespitosa Y.H.Long & Y.Wu)

Family : Cupressaceae

Metathelypteris laxa (Franch. & Sav.) Ching (Synonym : Aspidium laxum Franch. & Sav.)

Family : Thelypteridaceae