Melaleuca squarrosa 'Brian Walters'
Metapanax delavayi
Metasequoia glyptostroboides 'Amber Glow'
Metasequoia glyptostroboides 'Bluish'
Metasequoia glyptostroboides 'Miss Grace'
Metasequoia glyptostroboides 'Nothern Lights'
Microbiota decussata
Microbiota decussata
Microbiota decussata
Microbiota decussata
Mimetes cucullatus
Morus alba
Morus alba
Morus alba
Morus alba
Morus alba 'Ho'O''
Myrica californica (Calif Wax Myrtle)
Myrsine africana 'Scarlett Margin'
Myrtillocactus geometrizanz f. cristata
Nandina domestica 'Gulf Stream'
Nandina domestica 'Gulf Stream'
Nandina domestica 'Gulf Stream'
Nandina domestica 'Gulf Stream'
Nandina domestica 'Harbour Dwarf'
Nandina domestica 'Lemon Lime'
Nandina domestica 'Monfar'
Nandina domestica filamentosa
Narcissus 'Erlicheer'
Narcissus 'Golden Dawn'
Nolina texana
Nyssa sylvatica
Nyssa sylvatica
Nyssa sylvatica 'Pendula'
Nyssa sylvatica 'Red Rage'
Nyssa sylvatica 'Sheri's Cloud'
Ochagavia litoralis
Olea europaea 'Montra'
Olea europaea 'Montra'
Olea europaea 'Montra'
Olea europaea 'Wilsonii'
Olea europaea 'Wilsonii'
Olea europaea 'Wilsonii'
Opuntia 'Old Mexico'
Opuntia 'Old Mexico'
Opuntia 'Tubac'
Opuntia basilaris var brachyclada 'Mormon Rock'
Opuntia basilaris vr aurea 'Red Rocks'
Opuntia cacanapa 'Ellisiana'
Opuntia cacanapa 'Ellisiana'
Opuntia cochenillifera f. variegata
Opuntia ficus-indica 'Variegata' (Sunburst)
Opuntia fragilis
Opuntia imbricata 'Guadalupe'
Opuntia macrocentra 'Kunzleri'
Opuntia microdasys
Opuntia microdasys (monstrose form)
Opuntia monocantha variegata 'Joseph's Coat'
Opuntia polacantha
Opuntia pusilla (gold spined form)
Opuntia spinosior (highest elevation form)
Opuntia subulata
Opuntia wrightii (white spine)
Orbea variegata (used to be Stapelia)
Orostachys iwarenge
Oscularia caulescens
Oscularia caulescens
Oscularia deltoides
Osmanthus delavayi
Osmanthus heterophyllus 'Goshiki'
Osmanthus heterophyllus 'Goshiki'
Osmanthus heterophyllus 'Goshiki'
Osmanthus heterophyllus 'Gulftide'
Osmanthus heterophyllus 'Gulftide'
Osmanthus heterophyllus 'Kembu'
Osmanthus heterophyllus 'Ogon'
Osmanthus heterophyllus 'Sasaba'
Osmanthus rotundifolius
Osmanthus rotundifolius
Osteomeles schwerinae
Otatea acuminata ssp. aztecorum