Polygonum virginianum

Polygonum virginianum 'Compton's Form'

Polygonum virginianum 'Lance Corporal'

Polygonum virginianum 'Painter's Palette'

Polygonum weyrichii

Polypodium scolopendria

Polypodium virginianum

Polypodium vulgare 'Uulong Island'

Polystichum acrostichoides

Polystichum aculeatum

Polystichum drepanum

Polystichum setiferum

Pontederia cordata

Pontederia dilatata

Populus 'Androscoggin'

Populus alba

Populus alba 'Xinjang'

Populus angustifolia x nigra 'Italica'

Populus balsamifera

Populus balsamifera ssp. trichocarpa

Populus cathayana

Populus deltoides

Populus deltoides 'Fuego'

Populus deltoides 'Siouxland'

Populus deltoides ssp. wislizeni