Mertensia virginica Metopium toxiferum
Mikania scandens Mimosa dysocarpa
Mimosa grahamii Mimulus bigelovii
Mimulus cardinalis Mimulus guttatus
Mimulus ringens Mitchella repens
Monarda 'Colrain Red' Monarda 'Donnerwolke'
Monarda 'Petite Wonder' Monarda 'Raspberry Wine'
Monarda citriodora Monarda didyma
Monarda didyma 'Blue Stocking' Monarda didyma 'Cambridge Scarlet'
Monarda didyma 'Croftway Pink' Monarda didyma 'Gardenview Scarlet'
Monarda didyma 'Jacob Cline' Monarda didyma 'Marshal's Delight'
Monarda didyma 'Mrs. Perry' Monarda didyma 'Panorama'
Monarda didyma 'Petite Delight' Monarda didyma 'Snow White'
Monarda didyma 'Squaw' Monarda fistulosa
Monarda punctata Monardella subglabra
Monotropa uniflora Monstera deliciosa
Morus rubra Myosotis alpestris
Myosotis scorpioides Myrcianthes fragrans
Myrica californica Myrica cerifera
Myrica pensylvanica Myrsine guianensis
Myrtillocactus geometrizans Nelumbo lutea
Nelumbo nucifera Nelumbo nucifera 'Red Radiance'
Nemophila menziesii Neobuxbaumia polylopha
Neolloydia schmiedickeana Neolloydia valdeziana
Neomarica gracilis Nephrophyllidium crista-galli
Neptunia oleracea Nierembergia hippomanica
Nierembergia hippomanica 'Mont Blanc' Nolina bigelowii
Nolina matapensis Nolina microcarpa
Nolina recurvata Nolina stricta
Nuphar capensis Nuphar polysepala
Nymphaea 'Seignoretti' Nymphaea 'Yuh Ling'
Nymphaea odorata Nymphoides indica
Nymphoides peltata Nyssa aquatica
Nyssa ogeche Nyssa sylvatica
Nyssa sylvatica 'Dirr Selection' Oenothera caespitosa
Oenothera fruticosa Oenothera fruticosa ssp. glauca
Oenothera fruticosa ssp. glauca 'Summer Solstice' Oenothera lindheimeri
Oenothera lindheimeri 'Dauphin' Oenothera lindheimeri 'Franz Valley'
Oenothera lindheimeri 'Passionate Rainbow' Oenothera lindheimeri 'Siskiyou Pink'
Oenothera lindheimeri 'Whirling Butterflies' Oenothera macrocarpa
Oenothera macrocarpa 'Silver Wings' Oenothera speciosa
Oenothera speciosa 'Rosea' Oenothera speciosa 'Siskiyou'
Olneya tesota Onoclea sensibilis