'Prince' Calico Aster 'Prince Henry' Hybrid Windflower
'Prince Henry' Japanese Windflower 'Prince of Wales' Creeping Juniper
Prince of Wales Feather (spp.) Prince of Wales Feather 'Pygmy Torch'
'Prince Rupert' Sweet Scented Geranium Prince's Feather (spp.)
Prince's Feather 'Pygmy Torch' 'Princess Alice' Rose
'Princess Black Centered Orange' Pot Marigold 'Princess Diana' Apple Serviceberry
Princess Flower Princess Flower, Large Leaf
Princess Flower, Silver Leaf Princess Flower, Silver-leaf
'Princess Lily' Lily of the Incas: hybrid Princess Palm
'Princess' Shrubby Cinquefoil Princess Tree
Princess Tree: tomentosa 'Princess Victoria Louise' Oriental Poppy
'Princeton' American Elm 'Princeton Gold' Chinese Witchhazel
'Princeton Purple' Butterflybush: hybrid 'Prinz Handjeryi' Planetree Maple
'Priscilla' Florist's Chrysanthemum 'Prism Sunshine' Garden Petunia
'Pristine' Rose 'Pristine' Saucer Magnolia: soulangianahybrid
Privet Privet 'Little Thomas'
Privet, Border Privet, Chinese (spp.)
Privet, Chinese 'Excelsum Superbun' Privet, Chinese 'Tricolor'
Privet, Common (spp.) Privet, Common 'Lodense'
Privet, Florida Privet, Glossy (spp.)
Privet, Glossy 'Excelsum Superbun' Privet, Glossy 'Tricolor'
Privet, Golden (spp.) Privet, Japanese (spp.)
Privet, Japanese 'Curly Leaf' Privet, Mock
Privet, New Mexico Privet, Texas (spp.)
Privet, Texas 'Curly Leaf' Privet, Vicary (spp.)
Privet, Waxleaf (spp.) Privet, Waxleaf 'Curly Leaf'
Privet: salicifolium Privet: sinense, Chinese 'Sunshine'
Privet: sinense, Chinese Variegated 'Procumbens' Norway Spruce
'Prof. E. H. Wilson' Common Lilac 'Professor Claude' Louisiana Iris
'Professor Sprenger' Flowering Crabapple 'Profusion Cherry' Zinnia
'Profusion' Flowering Crabapple 'Profusion Orange' Zinnia
'Profusion' White Star 'Profusion White' Zinnia
Prophet, Weather 'Prosperity' Oregon Fleabane
'Prostrata' Coast Redwood 'Prostrata' Japanese Plum Yew
'Prostrata' Norway Spruce Prostrate Acacia
'Prostrate Beauty' Korean Fir 'Prostrate Blue' Blue Rat's Tail
'Prostrate Blue Mist' Colorado Spruce 'Prostrate Blue' Snakeweed
Prostrate Juniper Prostrate Petunia
Prostrate Speedwell 'Aztec Gold' Prostrate Speedwell 'Blue Sheen'
Prostrate Spurge Prostrate Tea Tree
'Prostratum Pink Cascade' New Zealand Tea Tree 'Prostratus' Creeping Germander
'Prostratus' Rosemary 'Prostratus' Sage Leaf Rock Rose
Protea 'Fiery Dutchess' Protea 'Pink Ice'
Protea 'Susara' Protea, Botrivier (spp.)
Protea, Botrivier 'Red Baron' Protea, Giant
Protea, King Protea, Oleander Leaved (spp.)
Protea, Oleander Leaved 'Pink Splash' 'Provence' Azalea
'Provence' Lavender Provision Tree
Pseuderanthemum 'Tricolor' Pseuderanthemum, Red
'Pseudocupressus' Eastern Red Cedar