Macrozamia moorei
Madia elegans
Madia glomerata
Madia gracilis
Madia subspicata
Magnolia campbellii
Magnolia laevifolia
Magnolia soulangiana
Magnolia tamaulipana
Mahonia pinnata ssp. insularis
Maianthemum gigas var. crassipes
Maianthemum racemosum
Maianthemum stellatum
Maihueniopsis ovata
Malacomeles denticulata
Malacothamnus fremontii
Malacothrix californica
Malacothrix floccifera
Malosma laurina
Malus micromalus
Malva assurgentiflora
Malva sylvestris
Malvaviscus arboreus
Marah fabacea
Marah horrida
Marrubium vulgare
Meconella californica
Medicago sativa ssp. sativa
Melaleuca thymifolia
Melampyrum arvense
Melianthus major
Melica stricta
Melilotus albus
Melilotus officinalis
Melilotus sp.
Mentha arvensis
Mentha haplocalyx
Mentzelia affinis
Mentzelia crocea
Mentzelia dispersa
Mentzelia laevicaulis var. laevicaulis
Mentzelia lindleyi
Mentzelia pectinata
Menyanthes trifoliata
Mertensia ciliata var. stomatechoides
Mespilus germanica
Metaleuca preissiana
Metasequoia glyptostroboides
Micranthes aprica
Micranthes bryophora
Micranthes californica
Micranthes odontoloma
Micranthes oregana
Microlepia platyphylla
Microseris nutans
Microseris sylvatica
Microsteris gracilis
Mimulus aurantiacus (see Diplacus aurantiacus)
Mimulus aurantiacus var. grandiflorus (see Diplacus grandiflorus)
Mimulus aurantiacus var. parviflorus (see Diplacus parviflorus)
Mimulus aurantiacus var. pubescens (see Diplacus longiflorus)
Mimulus bicolor (see Erythranthe bicolor)
Mimulus bolanderi (see Diplacus bolanderi)
Mimulus breweri (see Erythranthe breweri)
Mimulus cardinalis (see Erythranthe cardinalis)
Mimulus congdonii (see Diplacus congdonii)
Mimulus douglasii (see Diplacus douglasii)
Mimulus floribundus (see Erythranthe floribunda)
Mimulus guttatus (see Erythranthe guttata)
Mimulus inconspicuus (see Erythranthe acutidans)
Mimulus kelloggii (see Diplacus kelloggii)
Mimulus laciniatus (see Erythranthe laciniata)
Mimulus lewisii (see Erythranthe lewisii)
Mimulus montioides (see Erythranthe montioides)
Mimulus moschatus (see Erythranthe moschata)
Mimulus nanus (see Diplacus nanus)
Mimulus nanus var. mephiticus (see Diplacus mephiticus)
Mimulus pictus (see Diplacus pictus)
Mimulus primuloides (see Erythranthe primuloides)
Mimulus tilingii (see Erythranthe tilingii)
Mimulus torreyi (see Diplacus torreyi)
Mimulus whitneyi (see Diplacus bicolor)
Mirabilis jalapa var. jalapa
Mirabilis multiflora var. pubescens
Monardella breweri ssp. lanceolata
Monardella odoratissima
Monardella odoratissima ssp. glauca
Monardella odoratissima ssp. pallida
Monardella villosa var. franciscana
Monolopia stricta
Monotropa hypopitys
Montbretia sp.
Montia chamissoi
Moraea elegans
Muhlenbergia rigens
Musa basjoo
Musa sp.
Muscari armeniacum
Muscari comosum
Myoporum floribundum
Myosotis alpestris
Myosotis scorpioides
Myosotis sp.
Myosoton aquaticum
Myrica hartwegii
Myriophyllum sp.
Myrtus communis
Nama demissa var. demissa
Narcissus hadraeanthus
Narcissus tazetta var. orientalis
Narthecium californicum
Nassella pulchra
Nasturtium officinale
Navarretia intertexta
Navarretia intertexta ssp. intertexta
Navarretia leptalea ssp. bicolor
Navarretia leptalea ssp. leptalea
Navarretia pubescens
Neillia sinensis
Nemacladus interior
Nemophila heterophylla
Nemophila maculata
Nemophila menziesii var. menziesii
Nemophila parviflora var. quercifolia
Nemophila pedunculata
Nemophila pulchella var. pulchella
Nemophila spatulata
Neotinea ustulata
Neottia nidus-avis
Nerine bowdenii
Nerine undulata
Neviusia alabamensis
Neviusia cliftonii
Nicotiana glauca
Nicotiana otophora
Nicotiana tomentosa var. leguiana
Nigella damascena
Nolina parryi
Nolina sp.
Nothocalis alpestris
Notholithocarpus densiflorus
Nuphar polysepala