Penstemon 'Hidcote Pink' Penstemon 'Middleton Gem'
Penstemon 'Mother of Pearl' Penstemon 'Phoenix Red'
Penstemon 'Phoenix Violet' Penstemon 'Purple Passion'
Penstemon 'Sour Grapes' Penstemon barbatus
Penstemon barbatus 'Bashful' Penstemon barbatus 'Elfin Pink'
Penstemon barbatus 'Prairie Dusk' Penstemon barbatus 'Rondo'
Penstemon barrettiae Penstemon caespitosus 'Claude Barre'
Penstemon cobaea Penstemon digitalis
Penstemon digitalis 'Husker Red' Penstemon eatonii
Penstemon fructicosus 'Purple Haze' Penstemon glaber
Penstemon gloxinoides 'Ruby' Penstemon grinnellii
Penstemon guadalupsis Penstemon hartwegii 'Alice Hindley'
Penstemon heterophyllus 'Blue Bedder' Penstemon heterophyllus 'Electric Blue'
Penstemon heterophyllus 'Margarita BOP' Penstemon heterophyllus 'Platina White'
Penstemon hirsutus 'Pygmaeus' Penstemon isophyllus
Penstemon linarioides Penstemon x mexicali 'Pike's Peak Purple'
Penstemon x mexicali 'Red Rocks' Penstemon pinifolius
Penstemon spp. Penstemon strictus
Penstemon whippleanus Pentas lanceolata
Pentas lanceolata 'Buderin Blue' Pentas lanceolata 'Longwood Pink'
Pentas lanceolata 'New LookŪ Pink' Pentas lanceolata 'New LookŪ Rosa'
Pentas lanceolata 'Ruby Glow' Pentas lanceolata 'Stars & Stripes'
Pentas lanceolata 'Variegata' Peperomia argyreia
Peperomia caperata Peperomia clusiifolia 'Variegata'
Peperomia griseo-argentea Peperomia obtusifolia
Peperomia obtusifolia 'Variegata' Peperomia polybotrya
Peperomia rotundifolia var. pilsior Pericallis x hybrida
Pericallis x hybrida 'Cornflower Blue' Pericallis x hybrida 'Longwood Blue'
Perilla x 'Magilla' Perilla frutescens
Perilla frutescens 'Atropurpurea' Peristrophe hyssopifolia 'Aureo-variegata'
Perovskia atriplicifolia Perovskia atriplicifolia 'Blue Spire'
Perovskia atriplicifolia 'Filagran' Perovskia atriplicifolia 'Little Spire'
Perovskia atriplicifolia 'Longin' Persicaria perfoliata
Petasites fragrans Petasites frigidus var. palmatus 'Golden Palm'
Petasites japonicus Petasites japonicus var. giganteus
Petrorhagia saxifraga Petroselinum crispum
Petroselinum crispum 'Darki' Petroselinum crispum 'Extra Curled Dwarf'
Petroselinum crispum 'Petra' Petroselinum crispum 'Tuberosum'