'Potter's Purple' Butterflybush Powder Puff Tree
Powderpuff (spp.) Powderpuff Dwarf
Powderpuff, American 'Praecox' Panicle Hydrangea
Prague Viburnum (spp.) Prague Viburnum 'Decker'
Praire Flax 'Prairie Joy' Rose
'Prairie Petite' Lilac 'Prairifire' Flowering Crabapple
'Precious Platinum' Rose 'Pres. Grevy' Common Lilac
'President Lincoln' Common Lilac Preston Lilac 'Coral'
Preston Lilac 'James Macfarlane' Preston Lilac 'Minuet'
Preston Lilac 'Miss Canada' Preston Lilac 'Red Wine'
Prickly Cedar Prickly Juniper
Prickly Leaved Wattle Prickly Moses
Prickly Tea Tree 'Horizantalis' 'Primavera' Witchhazel: intermediahybrid
'Primrose Beauty' Shrubby Cinquefoil 'Primrose' Common Lilac
Primrose Jasmine 'Princess Alice' Rose
'Princess Diana' Apple Serviceberry Princess Flower
Princess Flower, Silver-leaf 'Princess' Shrubby Cinquefoil
'Princeton Gold' Chinese Witchhazel 'Princeton Purple' Butterflybush: hybrid
'Pristine' Rose Privet
Privet 'Little Thomas' Privet, Border
Privet, Common (spp.) Privet, Common 'Lodense'
Privet, Florida Privet, Golden (spp.)
Privet, Japanese (spp.) Privet, Japanese 'Curly Leaf'
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 'Prof. E. H. Wilson' Common Lilac
'Profusion' Flowering Crabapple 'Profusion' White Star
'Prostrata' Japanese Plum Yew 'Prostrate Blue' Blue Rat's Tail
'Prostrate Blue Mist' Colorado Spruce 'Prostrate Blue' Snakeweed
Prostrate Juniper 'Prostratum Pink Cascade' New Zealand Tea Tree
'Prostratus' Rosemary 'Prostratus' Sage Leaf Rock Rose
'Provence' Azalea 'Provence' Lavender
Pseuderanthemum, Red 'Pulchra' Bowstring Hemp
'Pulchra' Mother-in-Law's Tongue 'Pulchra' Snake Plant
'Pulverulenta' Black Elderberry 'Pumila' Dwarf Garden Serviceberry
'Pumila' Eastern White Pine 'Pumila Glauca' Norway Spruce
'Pumila' Hardy Fuchsia 'Pumila Nigra' Norway Spruce
'Pumila Sudworth' American Arborvitae Pungent Elaeagnus (spp.)
Pungent Elaeagnus 'Frederici' Pungent Elaeagnus Golden
Pungent Elaeagnus 'Yellow Edge Variegated' 'Puniceus Plenus' Rose of Sharon