| Quercus palustris | Pin Oak; Swamp Oak | | Oaks | Tree > 30 feet, Deciduous, Full sun, Zone 5a, Requires acid (pH 5.0 to 7.0) |
| Hydrangea paniculata SMHPZIND 'Pillow Talk' | Pillow Talk Panicle Hydrangea | | Hydrangea paniculata Collection (all of Cornell campus), Hydrangea Paniculata @ Minns Garden | Shrub < 4 feet, Full sun, Part shade, Shade, Zone 3b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Carya glabra | Pignut Hickory | | Dry Site Plants | Tree > 30 feet, Deciduous, Full sun, Zone 4a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Hydrangea paniculata 'Phantom' | Phantom Panicle Hydrangea | | Hydrangea paniculata Collection (all of Cornell campus), Hydrangea Paniculata @ Ag Quad and Warren Hall | Shrub 4 to 8 feet, Deciduous, Full sun, Part shade, Zone 3b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Parrotia persica | Persian Parrotia | | High pH | Tree < 30 feet, Deciduous, Full sun, Part shade, Zone 5a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Nyssa sylvatica | Pepperidge; Sour Gum; Black Gum; Tupelo | | Wet Site Plants | Tree > 30 feet, Deciduous, Full sun, Zone 5a, Can tolerate acid to neutral soil (pH 5.0 to 7.4), Tolerates salty soil |
| Syringa pekinensis | Pekin Lilac | | | Tree < 30 feet, Deciduous, Full sun, Zone 4b, Can tolerate acid to neutral soil (pH 5.0 to 7.4), Tolerates salty soil |
| Exochorda x macrantha | Pearl Bush | | Spring Flowering Trees and Shrubs, Zone 6 & 7 Plants plus shrubs | Shrub < 4 feet, Deciduous, Full sun, Zone 5b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Asimina triloba | Pawpaw | | Maples, Beeches and Others | Tree < 30 feet, Deciduous, Full sun, Part shade, Zone 5b, Can tolerate acid to neutral soil (pH 5.0 to 7.4) |
| Hydrangea paniculata Paszam 'Passionate' | Passionate Panicle Hydrangea | | Hydrangea paniculata Collection (all of Cornell campus), Hydrangea Paniculata @ Ag Quad and Warren Hall; Hydrangea paniculata Collection (all of Cornell campus), Hydrangea Paniculata @ Minns Garden | Shrub 4 to 8 feet, Full sun, Part shade, Shade, Zone 3b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Acer griseum | Paperbark Maple | | Maples, Beeches and Others | Tree < 30 feet, Deciduous, Full sun, Part shade, Zone 5b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Betula papyrifera | Paper Birch; Canoe Birch; White Birch | | Birch, Larch, Magnolias and Nut Trees at Arboretum | Tree > 30 feet, Deciduous, Full sun, Part shade, Zone 3a, Can tolerate acid to neutral soil (pH 5.0 to 7.4) |
| Hydrangea paniculata 'LC No. 2' | Panicle Hydrangea LC No. 2 | | Hydrangea paniculata Collection (all of Cornell campus), Hydrangea paniculata @ Friedman Wrestling Center | Shrub > 8 feet, Deciduous, Full sun, Part shade, Zone 5b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Hydrangea paniculata 'Burgundy Lace' | Panicle Hydrangea | | Hydrangea paniculata Collection (all of Cornell campus), Hydrangea paniculata @ Friedman Wrestling Center | Shrub 4 to 8 feet, Part shade, Zone 4a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Hydrangea paniculata | Panicle Hydrangea | | Flowering Landscape Shrubs | Shrub 4 to 8 feet, Deciduous, Full sun, Part shade, Shade, Zone 3a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Syringa meyeri 'Palibin' | Palibin Meyer Lilac | | Flowering Landscape Shrubs | Shrub 4 to 8 feet, Deciduous, Full sun, Part shade, Zone 4a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Acer truncatum | Painted Maple, Purpleblow Maple, Shantung Maple | | | Tree < 30 feet, Deciduous, Full sun, Zone 5a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Cornus alternifolia | Pagoda Dogwood | | | Tree < 30 feet, Deciduous, Part shade, Shade, Zone 4a, Requires acid (pH 5.0 to 7.0) |
| Rhododendron 'P.J.M.' | P.J.M. Rhododendron | | Broad-leaved Evergreens | Shrub 4 to 8 feet, Evergreen, Full sun, Part shade, Shade, Zone 5a, Can tolerate acid to neutral soil (pH 5.0 to 7.4) |
| Maclura pomifera | Osage Orange; Boxwood | | Dry Site Plants | Tree > 30 feet, Deciduous, Full sun, Zone 4a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0), Tolerates salt spray |