Plants — M
- Maclura cochinchinensis cockspurthorn
- Magnolia Michelia
- Magnolia × alba white champaca
- Magnolia champaca
- Magnolia denudata Lilytree
- Magnolia figo Banana Magnolia
- Magnolia kobus Kobus Magnolia
- Magnolia liliiflora Flowering Magnolia
- Magnolia obovata Japanese Big Leaf Magnolia
- Magnolia officinalis Houpu Magnolia
- Mahonia japonica
- Mahonia oiwakensis
- Malesherbia auristipulata
- Mallotus barbatus
- Mallotus japonicus East Asian mallotus
- Mallotus philippensis Kamala tree
- Mallotus repandus
- Malpighia emarginata Barbados Cherry
- Mammea americana Mamaya
- Mandragora
- Mandragora officinarum Mediterranean mandrake
- Mangifera caesia
- Mangifera indica Am
- Mangifera odorata Kuwini Mango
- Manihot esculenta cassava
- Mansonia gagei
- Marah oregana Oregon bigroot
- Mareya
- Marrubium vulgare Common Hoarhound
- Marsdenia tenacissima Rajmahal-creeper
- Marsdenia tinctoria
- Martynia Tiger's claw
- Matricaria chamomilla
- Matricaria discoidea Disc Mayweed
- Maytenus aquifolium
- Maytenus krukovii Maytenus macrocarpa
- Maytenus robusta Maytenus gonoclados
- Melaleuca bottlebrush
- Melaleuca alternifolia Narrow-leaved paperbark
- Melaleuca dissitiflora creek tea–tree
- Melaleuca leucadendra Cajeput
- Melaleuca viridiflora Broad Leaved Tea Tree
- Melastoma malabathricum Indian-rhododendron
- Melastoma villosum
- Melia azedarach Bead Tree
- Melilotus Melilot, Sweet-clover
- Melilotus albus Bokhara Clover
- Melilotus officinalis Ribbed Melilot
- Melissa officinalis Balm
- Melittis melissophyllum Bastard Balm
- Memecylon edule kaayam
- Mentha
- Mentha aquatica Aromatic Thyme
- Mentha arvensis corn mint
- Mentha asiatica
- Mentha canadensis American Corn Mint
- Mentha japonica
- Mentha longifolia Biblical Mint
- Mentha ×piperita
- Mentha piperita peppermint
- Mentha pulegium
- Mentha requienii Corsican Mint
- Mentha spicata Bush Mint
- Mentha suaveolens Apple Mint
- Mentzelia multiflora Adonis Stickleaf
- Menyanthes trifoliata Bog-bean
- Mercurialis perennis
- Mesua ferrea Ceylon ironwood
- Meum
- Meum athamanticum Bald-Money
- Microcos paniculata microcos
- Microcos tomentosa
- Microgramma nitida
- Micromeria fruticosa
- Microsorum punctatum Climbing bird's nest fern
- Milleria quinqueflora
- Millingtonia hortensis
- Mimosa diplotricha
- Mimosa ophthalmocentra
- Mimosa pudica Action Plant
- Mimosa somnians
- Mimosa tenuiflora
- Mimosa verrucosa
- Mimusops elengi Bulletwood
- Minthostachys mollis
- Mirabilis jalapa
- Mitchella repens Partridge-berry
- Mitragyna speciosa
- Momordica Balsam-Apple
- Momordica balsamina
- Momordica charantia Balsam Pear
- Momordica cochinchinensis Balsam Pear
- Monarda Beebalm
- Monarda didyma Beebalm
- Monarda fistulosa Beebalm
- Monarda punctata Dotted Mint
- Monodora myristica African nutmeg
- Monotropa Ghost Plants
- Monstera deliciosa Ceriman
- Montanoa tomentosa
- Morchella esculenta Common Morel
- Morella caroliniensis Myrica caroliniensis
- Morinda angustifolia
- Morinda citrifolia French mulberry
- Morinda officinalis
- Moringa oleifera moringa
- Morus Mulberries
- Morus indica Cape Mulberry
- Morus mongolica Mongolian mulberry
- Morus nigra Black Mulberry
- Mosla dianthera Miniature beefsteakplant
- Mosla punctulata
- Motandra guineensis
- Mucuna Mucunas
- Mucuna pruriens Cowitch
- Muntingia calabura Jamaica cherry
- Murraya
- Murraya koenigii Curryleaftree
- Murraya paniculata Chinese box
- Musa × paradisiaca French plantain
- Mussaenda pubescens
- Myrica esculenta
- Myrica rubra Waxberry tree
- Myristica Nutmeg
- Myristica malabarica Malabar Nutmeg
- Myrsine africana African Boxwood
- Myrtus myrtle
- Myrtus communis common myrtle