There are 158 herbs that start with the letter P, from Pachylophis to Pyrola. Below you will find them listed alphabetically along with some general information about each. Click the toggle view buttons in the top right corner to switch between the card and the table view.
For each item you will find the following information
Order: The subclass the herbs belongs to
Habitat: The places or type of weather the herbs lives in
Scientific name: The designation that scientists use to catalog the species
Name: Pachylophis
Order: Apiales
Habitat: Western North America, California
Scientific name: Pachylophis lewisii
Name: Paederia
Order: Rubiales
Habitat: Asia
Scientific name: Paederia foetida
Name: Paeonia
Order: Ranunculales
Habitat: Temperate regions of the Northern Hemisphere
Scientific name: Paeonia spp.
Name: Paeonia californica
Order: Ranunculales
Habitat: Native to California
Scientific name: Paeonia californica
Name: Paeonia officinalis
Order: Ranunculales
Habitat: Native to southern Europe
Scientific name: Paeonia officinalis
Name: Palafoxia
Order: Asterales
Habitat: Southwestern United States, Mexico
Scientific name: Palafoxia arida
Name: Palamonium
Order: Polemoniaceae
Habitat: Native to North America
Scientific name: Palamonium spp.
Name: Palampur Mint
Order: Lamiales
Habitat: India
Scientific name: Mentha piperita var. palampur
Name: Palapartum
Order: Asterales
Habitat: Eastern Asia
Scientific name: Chromolaena odorata
Name: Pale Swallowtail Herb
Order: Apiales
Habitat: Temperate forest regions of North America
Scientific name: Papilio glaucus
Name: Palhinhaea
Order: Lycopodiales
Habitat: Tropical Americas
Scientific name: Palhinhaea cernua
Name: Paliurus
Order: Rosales
Habitat: Mediterranean region
Scientific name: Paliurus spina-christi
Name: Pallave
Order: Apiales
Habitat: North Africa, Middle East
Scientific name: Pallave apioides
Name: Pallenis
Order: Asterales
Habitat: Mediterranean region
Scientific name: Pallenis spinosa
Name: Pallow
Order: Lamiales
Habitat: South America
Scientific name: Solenomelus segethi
Name: Palmarinka
Order: Gentianales
Habitat: Subtropical Americas
Scientific name: Palmarinka pulchra
Name: Palmarosa
Order: Poales
Habitat: India
Scientific name: Cymbopogon martinii
Name: Palmatifida
Order: Lamiales
Habitat: Native to Asia
Scientific name: Palmatifida spp.
Name: Palombi
Order: Apiales
Habitat: Italy
Scientific name: Angelica palombii
Name: Paltria
Order: Asparagales
Habitat: South America
Scientific name: Paltria serotina
Name: Pamirskia
Order: Gentianales
Habitat: Central Asia
Scientific name: Pamirskia turkestanica
Name: Pampa Grass
Order: Poales
Habitat: Native to South America
Scientific name: Cortaderia spp.
Name: Pampas Grass
Order: Poales
Habitat: South America
Scientific name: Cortaderia selloana
Name: Panacea
Order: Asterales
Habitat: Northern South America
Scientific name: Panacea samariensis
Name: Panax
Order: Apiales
Habitat: Native to Asia and North America
Scientific name: Panax spp.
Name: Panax Ginseng
Order: Apiales
Habitat: Asia
Scientific name: Panax ginseng
Name: Panax Notoginseng
Order: Apiales
Habitat: China
Scientific name: Panax notoginseng
Name: Panax Quinquefolius
Order: Apiales
Habitat: Eastern North America
Scientific name: Panax quinquefolius
Name: Panelinella
Order: Asterales
Habitat: Central Asia
Scientific name: Panelinella chondrilloides
Name: Panicularia
Order: Poales
Habitat: North America, Europe, Asia
Scientific name: Panicularia fluitans
Name: Panicum
Order: Poales
Habitat: North America, Europe, Asia
Scientific name: Panicum virgatum
Name: Panopuntia
Order: Caryophyllales
Habitat: Peru
Scientific name: Panopuntia pachyrrhiza
Name: Pansies
Order: Malpighiales
Habitat: Europe
Scientific name: Viola tricolor
Name: Papaver
Order: Ranunculales
Habitat: Temperate regions of the Northern Hemisphere
Scientific name: Papaver spp.
Name: Papaveraceae
Order: Ranunculales
Habitat: Europe, Asia, North Africa
Scientific name: Papaver rhoeas
Name: Paphs
Order: Orchidales
Habitat: Native to Asia
Scientific name: Paphiopedilum spp.
Name: Paprika
Order: Solanales
Habitat: Native to Central and South America, cultivated globally
Scientific name: Capsicum annuum
Name: Papuana Ginger
Order: Zingiberales
Habitat: Papua New Guinea
Scientific name: Zingiber papuanum
Name: Parietaria
Order: Rosales
Habitat: Europe and North Africa
Scientific name: Parietaria officinalis
Name: Parilla
Order: Apiales
Habitat: Eastern North America
Scientific name: Menispermum canadense
Name: Parnassia
Order: Celastrales
Habitat: Northern temperate regions
Scientific name: Parnassia palustris
Name: Paronychia
Order: Caryophyllales
Habitat: Native to Europe and North America
Scientific name: Paronychia spp.
Name: Parrotia
Order: Hamemelidales
Habitat: Native to Asia
Scientific name: Parrotia spp.
Name: Parsley
Order: Apiales
Habitat: Temperate regions of Europe and the Middle East
Scientific name: Petroselinum crispum
Name: Parsley Water Dropwort
Order: Apiales
Habitat: Europe
Scientific name: Oenanthe pimpinelloides
Name: Parthenium
Order: Asterales
Habitat: Tropical America
Scientific name: Parthenium hysterophorus
Name: Pasque Flower
Order: Ranunculales
Habitat: Europe
Scientific name: Pulsatilla vulgaris
Name: Passiflora
Order: Malpighiales
Habitat: Tropical and subtropical regions
Scientific name: Passiflora spp.
Name: Passion Flower
Order: Malpighiales
Habitat: Native to southern Brazil and Paraguay, cultivated globally
Scientific name: Passiflora edulis
Name: Pastinaca
Order: Apiales
Habitat: Native to Europe and Asia
Scientific name: Pastinaca sativa
Name: Patagonian Boldo
Order: Laurales
Habitat: Chile
Scientific name: Peumus boldus
Name: Patagonian Parsley
Order: Apiales
Habitat: Patagonia region of South America
Scientific name: Asteriscium chilense
Name: Patchouli
Order: Lamiales
Habitat: Southeast Asia
Scientific name: Pogostemon cablin
Name: Pau d'Arco
Order: Bignoniaceae
Habitat: South America
Scientific name: Handroanthus impetiginosus
Name: Paulownia
Order: Lamiales
Habitat: East Asia
Scientific name: Paulownia tomentosa
Name: Paxistima
Order: Celastrales
Habitat: Western North America
Scientific name: Paxistima canbyi
Name: Peanut
Order: Fabales
Habitat: South America
Scientific name: Arachis hypogaea
Name: Peanut Butter Flower
Order: Apiales
Habitat: Europe
Scientific name: Oenanthe crocata
Name: Pecan
Order: Juglandales
Habitat: North America
Scientific name: Carya illinoinensis
Name: Pedicularis
Order: Lamiales
Habitat: Northern Hemisphere
Scientific name: Pedicularis spp.
Name: Pelargonium
Order: Geraniales
Habitat: Native to South Africa
Scientific name: Pelargonium spp.
Name: Pellitory
Order: Urticales
Habitat: Native to Europe and temperate Asia
Scientific name: Parietaria officinalis
Name: Pellitory-of-the-Wall
Order: Urticales
Habitat: Europe
Scientific name: Parietaria officinalis
Name: Peltandra
Order: Alismatales
Habitat: Eastern North America
Scientific name: Peltandra virginica
Name: Pennyroyal
Order: Lamiales
Habitat: Native to Europe and the Mediterranean region
Scientific name: Mentha pulegium
Name: Pennyroyal Oak
Order: Fagales
Habitat: Mediterranean
Scientific name: Quercus pubescentis
Name: Penstemon
Order: Lamiales
Habitat: North America
Scientific name: Penstemon spp.
Name: Peony
Order: Ranunculales
Habitat: Native to Asia and Europe
Scientific name: Paeonia spp.
Name: Pepper Vine
Order: Vitales
Habitat: Eastern North America
Scientific name: Ampelopsis arborea
Name: Pepperbark Tree
Order: Malvales
Habitat: Africa
Scientific name: Warburgia salutaris
Name: Pepperbush
Order: Ericales
Habitat: Eastern United States
Scientific name: Clethra alnifolia
Name: Peppermint
Order: Lamiales
Habitat: Native to Europe and the Middle East, cultivated worldwide
Scientific name: Mentha × piperita
Name: Peppermint Nightshade
Order: Solanales
Habitat: South America
Scientific name: Solanum hirtum
Name: Pepperwort
Order: Brassicales
Habitat: Native to the Middle East, cultivated worldwide
Scientific name: Lepidium sativum
Name: Perilla
Order: Lamiales
Habitat: Native to East Asia, cultivated globally
Scientific name: Perilla frutescens
Name: Persian Hogweed
Order: Apiales
Habitat: Central Asia
Scientific name: Heracleum persicum
Name: Persimmon
Order: Ericales
Habitat: Native to Asia and North America
Scientific name: Diospyros spp.
Name: Peruvian Balsam
Order: Fabales
Habitat: Central America
Scientific name: Myroxylon balsamum
Name: Peruvian Buttercup
Order: Ranunculales
Habitat: Andes mountains of Peru
Scientific name: Ranunculus peruvianus
Name: Peruvian Ginger
Order: Zingiberales
Habitat: Peru
Scientific name: Zingiber officinale var. peruanum
Name: Petasites
Order: Asterales
Habitat: Northern Hemisphere
Scientific name: Petasites spp.
Name: Petiveria
Order: Caryophyllales
Habitat: Central and South America
Scientific name: Petiveria alliacea
Name: Petroselinum
Order: Apiales
Habitat: Native to Europe
Scientific name: Petroselinum crispum
Name: Petunia
Order: Solanales
Habitat: Native to South America
Scientific name: Petunia spp.
Name: Peucedanum
Order: Apiales
Habitat: Europe and West Asia
Scientific name: Peucedanum ostruthium
Name: Peumus
Order: Laurales
Habitat: South America
Scientific name: Peumus boldus
Name: Peyote
Order: Caryophyllales
Habitat: North America
Scientific name: Lophophora williamsii
Name: Pharbitis
Order: Solanales
Habitat: Asia
Scientific name: Pharbitis nil
Name: Phaseolus
Order: Fabales
Habitat: Tropical Americas
Scientific name: Phaseolus vulgaris
Name: Pheasant's Eye
Order: Ranunculales
Habitat: Europe
Scientific name: Adonis vernalis
Name: Phellodendron
Order: Rutales
Habitat: Native to Asia
Scientific name: Phellodendron spp.
Name: Philadelphus
Order: Saxifragales
Habitat: North America, Europe, Asia
Scientific name: Philadelphus coronarius
Name: Philodendron
Order: Arales
Habitat: Native to the Americas
Scientific name: Philodendron spp.
Name: Phlox
Order: Polemomiales
Habitat: North America
Scientific name: Phlox paniculata
Name: Phyllanthus
Order: Malpighiales
Habitat: Pantropical
Scientific name: Phyllanthus spp.
Name: Phyllostachys
Order: Poales
Habitat: East Asia
Scientific name: Phyllostachys aurea
Name: Physalis
Order: Solanales
Habitat: Eurasia and the Americas
Scientific name: Physalis alkekengi
Name: Picea
Order: Pinales
Habitat: Northern Europe, Asia
Scientific name: Picea abies
Name: Pichurim Bean
Order: Laurales
Habitat: South America
Scientific name: Cryptocarya moschata
Name: Pickerelweed
Order: Commelinales
Habitat: North America
Scientific name: Pontederia cordata
Name: Picralima
Order: Gentianales
Habitat: West Africa
Scientific name: Picralima nitida
Name: Pignut Hickory
Order: Juglandales
Habitat: North America
Scientific name: Carya glabra
Name: Pimento
Order: Myrtales
Habitat: Jamaica
Scientific name: Pimenta dioica
Name: Pimpinella
Order: Apiales
Habitat: Native to the eastern Mediterranean and Southwest Asia
Scientific name: Pimpinella anisum
Name: Pinellia
Order: Alismatales
Habitat: Eastern Asia
Scientific name: Pinellia ternata
Name: Pinguicula
Order: Lamiales
Habitat: Northern hemisphere
Scientific name: Pinguicula vulgaris
Name: Pink Jasmine
Order: Gentianales
Habitat: Asia
Scientific name: Jasminum polyanthum
Name: Piper
Order: Piperales
Habitat: Tropical Asia
Scientific name: Piper nigrum
Name: Pipsissewa
Order: Ericales
Habitat: Native to North America and Northeast Asia
Scientific name: Chimaphila umbellata
Name: Pipsissewa Wintergreen
Order: Ericales
Habitat: North America and northeast Asia
Scientific name: Chimaphila umbellata
Name: Pistacia
Order: Sapindales
Habitat: Middle East, Central Asia
Scientific name: Pistacia vera
Name: Pitanga
Order: Myrtales
Habitat: Brazil
Scientific name: Eugenia uniflora
Name: Plantago
Order: Lamiales
Habitat: Europe and West Asia
Scientific name: Plantago lanceolata
Name: Plantain
Order: Plantaginales
Habitat: Native to Europe and Asia, naturalized worldwide
Scientific name: Plantago major
Name: Plantain Lily
Order: Asparagales
Habitat: Asia
Scientific name: Hosta spp.
Name: Pleurisy Root
Order: Gentianales
Habitat: Eastern and central North America
Scientific name: Asclepias tuberosa
Name: Podophyllum
Order: Ranunculales
Habitat: North America
Scientific name: Podophyllum peltatum
Name: Pokeberry
Order: Caryophyllales
Habitat: North America
Scientific name: Phytolacca americana
Name: Pokeweed
Order: Caryophyllales
Habitat: Native to eastern North America
Scientific name: Phytolacca americana
Name: Polygala
Order: Fabales
Habitat: North America
Scientific name: Polygala senega
Name: Polygonatum
Order: Asparagales
Habitat: Europe, Asia
Scientific name: Polygonatum odoratum
Name: Polygonum
Order: Caryophyllales
Habitat: Worldwide
Scientific name: Polygonum aviculare
Name: Polypody
Order: Polypodiales
Habitat: Native to temperate regions of the Northern Hemisphere
Scientific name: Polypodium vulgare
Name: Pomegranate
Order: Lythrales
Habitat: Native to the Middle East and Mediterranean region
Scientific name: Punica granatum
Name: Pond Pennywort
Order: Apiales
Habitat: Aquatic habitats worldwide
Scientific name: Hydrocotyle ranunculoides
Name: Pontic Rhododendron
Order: Ericales
Habitat: Caucasus region and Black Sea coast
Scientific name: Rhododendron ponticum
Name: Poppy
Order: Ranunculales
Habitat: Northern Hemisphere
Scientific name: Papaver spp.
Name: Populus
Order: Malpighiales
Habitat: North America, Eurasia
Scientific name: Populus tremuloides
Name: Portulaca
Order: Caryophyllales
Habitat: Worldwide
Scientific name: Portulaca oleracea
Name: Pot Marigold
Order: Asterales
Habitat: Mediterranean
Scientific name: Calendula officinalis
Name: Potato
Order: Solanales
Habitat: Andes
Scientific name: Solanum tuberosum
Name: Potentilla
Order: Rosales
Habitat: Temperate regions of the Northern Hemisphere
Scientific name: Potentilla reptans
Name: Prastium
Order: Lamiales
Habitat: Mediterranean region
Scientific name: Prastium majus
Name: Prenanthes
Order: Asterales
Habitat: North America, Eurasia
Scientific name: Prenanthes purpurea
Name: Prickly Ash
Order: Rutales
Habitat: North America
Scientific name: Zanthoxylum americanum
Name: Prickly Pear
Order: Caryophyllales
Habitat: Americas
Scientific name: Opuntia spp.
Name: Primrose Jasmine
Order: Gentianales
Habitat: Southern China
Scientific name: Jasminum mesnyi
Name: Primula
Order: Ericales
Habitat: Europe, Asia
Scientific name: Primula veris
Name: Prince's Feather
Order: Caryophyllales
Habitat: Asia
Scientific name: Polygonum orientale
Name: Privet
Order: Lamiales
Habitat: Asia
Scientific name: Ligustrum spp.
Name: Prosopis
Order: Fabales
Habitat: Americas, Africa, Asia
Scientific name: Prosopis juliflora
Name: Prunella
Order: Lamiales
Habitat: Northern Hemisphere
Scientific name: Prunella vulgaris
Name: Prunus
Order: Rosales
Habitat: North America, Eurasia
Scientific name: Prunus serotina
Name: Pseudoaniseed
Order: Apiales
Habitat: Asia
Scientific name: Trachyspermum ammi
Name: Pseudowintera
Order: Canellales
Habitat: New Zealand
Scientific name: Pseudowintera colorata
Name: Psychotria
Order: Gentianales
Habitat: Pantropical
Scientific name: Psychotria spp.
Name: Ptelea
Order: Sapindales
Habitat: Eastern North America
Scientific name: Ptelea trifoliata
Name: Pteridium
Order: Polypodiales
Habitat: Worldwide
Scientific name: Pteridium aquilinum
Name: Ptychopetalum
Order: Malpighiales
Habitat: South America
Scientific name: Ptychopetalum olacoides
Name: Pukatea
Order: Laurales
Habitat: New Zealand
Scientific name: Laurelia novae-zelandiae
Name: Pulmonaria
Order: Boraginales
Habitat: Europe
Scientific name: Pulmonaria officinalis
Name: Pulsatilla
Order: Ranunculales
Habitat: Europe and Asia
Scientific name: Pulsatilla vulgaris
Name: Punica
Order: Myrtales
Habitat: Middle East and Mediterranean
Scientific name: Punica granatum
Name: Purple Coneflower
Order: Asterales
Habitat: Central and eastern North America
Scientific name: Echinacea purpurea
Name: Purslane
Order: Caryophyllales
Habitat: Native to the Middle East, Asia, and Europe, naturalized worldwide
Scientific name: Portulaca oleracea
Name: Pycnanthemum
Order: Lamiales
Habitat: Eastern North America
Scientific name: Pycnanthemum virginianum
Name: Pygmy Date Palm
Order: Arecales
Habitat: Africa
Scientific name: Phoenix reclinata
Name: Pyrola
Order: Ericales
Habitat: Northern hemisphere
Scientific name: Pyrola rotundifolia
| Name | Order | Habitat | Scientific name |
|---|---|---|---|
| Pachylophis | Apiales | Western North America, California | Pachylophis lewisii |
| Paederia | Rubiales | Asia | Paederia foetida |
| Paeonia | Ranunculales | Temperate regions of the Northern Hemisphere | Paeonia spp. |
| Paeonia californica | Ranunculales | Native to California | Paeonia californica |
| Paeonia officinalis | Ranunculales | Native to southern Europe | Paeonia officinalis |
| Palafoxia | Asterales | Southwestern United States, Mexico | Palafoxia arida |
| Palamonium | Polemoniaceae | Native to North America | Palamonium spp. |
| Palampur Mint | Lamiales | India | Mentha piperita var. palampur |
| Palapartum | Asterales | Eastern Asia | Chromolaena odorata |
| Pale Swallowtail Herb | Apiales | Temperate forest regions of North America | Papilio glaucus |
| Palhinhaea | Lycopodiales | Tropical Americas | Palhinhaea cernua |
| Paliurus | Rosales | Mediterranean region | Paliurus spina-christi |
| Pallave | Apiales | North Africa, Middle East | Pallave apioides |
| Pallenis | Asterales | Mediterranean region | Pallenis spinosa |
| Pallow | Lamiales | South America | Solenomelus segethi |
| Palmarinka | Gentianales | Subtropical Americas | Palmarinka pulchra |
| Palmarosa | Poales | India | Cymbopogon martinii |
| Palmatifida | Lamiales | Native to Asia | Palmatifida spp. |
| Palombi | Apiales | Italy | Angelica palombii |
| Paltria | Asparagales | South America | Paltria serotina |
| Pamirskia | Gentianales | Central Asia | Pamirskia turkestanica |
| Pampa Grass | Poales | Native to South America | Cortaderia spp. |
| Pampas Grass | Poales | South America | Cortaderia selloana |
| Panacea | Asterales | Northern South America | Panacea samariensis |
| Panax | Apiales | Native to Asia and North America | Panax spp. |
| Panax Ginseng | Apiales | Asia | Panax ginseng |
| Panax Notoginseng | Apiales | China | Panax notoginseng |
| Panax Quinquefolius | Apiales | Eastern North America | Panax quinquefolius |
| Panelinella | Asterales | Central Asia | Panelinella chondrilloides |
| Panicularia | Poales | North America, Europe, Asia | Panicularia fluitans |
| Panicum | Poales | North America, Europe, Asia | Panicum virgatum |
| Panopuntia | Caryophyllales | Peru | Panopuntia pachyrrhiza |
| Pansies | Malpighiales | Europe | Viola tricolor |
| Papaver | Ranunculales | Temperate regions of the Northern Hemisphere | Papaver spp. |
| Papaveraceae | Ranunculales | Europe, Asia, North Africa | Papaver rhoeas |
| Paphs | Orchidales | Native to Asia | Paphiopedilum spp. |
| Paprika | Solanales | Native to Central and South America, cultivated globally | Capsicum annuum |
| Papuana Ginger | Zingiberales | Papua New Guinea | Zingiber papuanum |
| Parietaria | Rosales | Europe and North Africa | Parietaria officinalis |
| Parilla | Apiales | Eastern North America | Menispermum canadense |
| Parnassia | Celastrales | Northern temperate regions | Parnassia palustris |
| Paronychia | Caryophyllales | Native to Europe and North America | Paronychia spp. |
| Parrotia | Hamemelidales | Native to Asia | Parrotia spp. |
| Parsley | Apiales | Temperate regions of Europe and the Middle East | Petroselinum crispum |
| Parsley Water Dropwort | Apiales | Europe | Oenanthe pimpinelloides |
| Parthenium | Asterales | Tropical America | Parthenium hysterophorus |
| Pasque Flower | Ranunculales | Europe | Pulsatilla vulgaris |
| Passiflora | Malpighiales | Tropical and subtropical regions | Passiflora spp. |
| Passion Flower | Malpighiales | Native to southern Brazil and Paraguay, cultivated globally | Passiflora edulis |
| Pastinaca | Apiales | Native to Europe and Asia | Pastinaca sativa |
| Patagonian Boldo | Laurales | Chile | Peumus boldus |
| Patagonian Parsley | Apiales | Patagonia region of South America | Asteriscium chilense |
| Patchouli | Lamiales | Southeast Asia | Pogostemon cablin |
| Pau d'Arco | Bignoniaceae | South America | Handroanthus impetiginosus |
| Paulownia | Lamiales | East Asia | Paulownia tomentosa |
| Paxistima | Celastrales | Western North America | Paxistima canbyi |
| Peanut | Fabales | South America | Arachis hypogaea |
| Peanut Butter Flower | Apiales | Europe | Oenanthe crocata |
| Pecan | Juglandales | North America | Carya illinoinensis |
| Pedicularis | Lamiales | Northern Hemisphere | Pedicularis spp. |
| Pelargonium | Geraniales | Native to South Africa | Pelargonium spp. |
| Pellitory | Urticales | Native to Europe and temperate Asia | Parietaria officinalis |
| Pellitory-of-the-Wall | Urticales | Europe | Parietaria officinalis |
| Peltandra | Alismatales | Eastern North America | Peltandra virginica |
| Pennyroyal | Lamiales | Native to Europe and the Mediterranean region | Mentha pulegium |
| Pennyroyal Oak | Fagales | Mediterranean | Quercus pubescentis |
| Penstemon | Lamiales | North America | Penstemon spp. |
| Peony | Ranunculales | Native to Asia and Europe | Paeonia spp. |
| Pepper Vine | Vitales | Eastern North America | Ampelopsis arborea |
| Pepperbark Tree | Malvales | Africa | Warburgia salutaris |
| Pepperbush | Ericales | Eastern United States | Clethra alnifolia |
| Peppermint | Lamiales | Native to Europe and the Middle East, cultivated worldwide | Mentha × piperita |
| Peppermint Nightshade | Solanales | South America | Solanum hirtum |
| Pepperwort | Brassicales | Native to the Middle East, cultivated worldwide | Lepidium sativum |
| Perilla | Lamiales | Native to East Asia, cultivated globally | Perilla frutescens |
| Persian Hogweed | Apiales | Central Asia | Heracleum persicum |
| Persimmon | Ericales | Native to Asia and North America | Diospyros spp. |
| Peruvian Balsam | Fabales | Central America | Myroxylon balsamum |
| Peruvian Buttercup | Ranunculales | Andes mountains of Peru | Ranunculus peruvianus |
| Peruvian Ginger | Zingiberales | Peru | Zingiber officinale var. peruanum |
| Petasites | Asterales | Northern Hemisphere | Petasites spp. |
| Petiveria | Caryophyllales | Central and South America | Petiveria alliacea |
| Petroselinum | Apiales | Native to Europe | Petroselinum crispum |
| Petunia | Solanales | Native to South America | Petunia spp. |
| Peucedanum | Apiales | Europe and West Asia | Peucedanum ostruthium |
| Peumus | Laurales | South America | Peumus boldus |
| Peyote | Caryophyllales | North America | Lophophora williamsii |
| Pharbitis | Solanales | Asia | Pharbitis nil |
| Phaseolus | Fabales | Tropical Americas | Phaseolus vulgaris |
| Pheasant's Eye | Ranunculales | Europe | Adonis vernalis |
| Phellodendron | Rutales | Native to Asia | Phellodendron spp. |
| Philadelphus | Saxifragales | North America, Europe, Asia | Philadelphus coronarius |
| Philodendron | Arales | Native to the Americas | Philodendron spp. |
| Phlox | Polemomiales | North America | Phlox paniculata |
| Phyllanthus | Malpighiales | Pantropical | Phyllanthus spp. |
| Phyllostachys | Poales | East Asia | Phyllostachys aurea |
| Physalis | Solanales | Eurasia and the Americas | Physalis alkekengi |
| Picea | Pinales | Northern Europe, Asia | Picea abies |
| Pichurim Bean | Laurales | South America | Cryptocarya moschata |
| Pickerelweed | Commelinales | North America | Pontederia cordata |
| Picralima | Gentianales | West Africa | Picralima nitida |
| Pignut Hickory | Juglandales | North America | Carya glabra |
| Pimento | Myrtales | Jamaica | Pimenta dioica |
| Pimpinella | Apiales | Native to the eastern Mediterranean and Southwest Asia | Pimpinella anisum |
| Pinellia | Alismatales | Eastern Asia | Pinellia ternata |
| Pinguicula | Lamiales | Northern hemisphere | Pinguicula vulgaris |
| Pink Jasmine | Gentianales | Asia | Jasminum polyanthum |
| Piper | Piperales | Tropical Asia | Piper nigrum |
| Pipsissewa | Ericales | Native to North America and Northeast Asia | Chimaphila umbellata |
| Pipsissewa Wintergreen | Ericales | North America and northeast Asia | Chimaphila umbellata |
| Pistacia | Sapindales | Middle East, Central Asia | Pistacia vera |
| Pitanga | Myrtales | Brazil | Eugenia uniflora |
| Plantago | Lamiales | Europe and West Asia | Plantago lanceolata |
| Plantain | Plantaginales | Native to Europe and Asia, naturalized worldwide | Plantago major |
| Plantain Lily | Asparagales | Asia | Hosta spp. |
| Pleurisy Root | Gentianales | Eastern and central North America | Asclepias tuberosa |
| Podophyllum | Ranunculales | North America | Podophyllum peltatum |
| Pokeberry | Caryophyllales | North America | Phytolacca americana |
| Pokeweed | Caryophyllales | Native to eastern North America | Phytolacca americana |
| Polygala | Fabales | North America | Polygala senega |
| Polygonatum | Asparagales | Europe, Asia | Polygonatum odoratum |
| Polygonum | Caryophyllales | Worldwide | Polygonum aviculare |
| Polypody | Polypodiales | Native to temperate regions of the Northern Hemisphere | Polypodium vulgare |
| Pomegranate | Lythrales | Native to the Middle East and Mediterranean region | Punica granatum |
| Pond Pennywort | Apiales | Aquatic habitats worldwide | Hydrocotyle ranunculoides |
| Pontic Rhododendron | Ericales | Caucasus region and Black Sea coast | Rhododendron ponticum |
| Poppy | Ranunculales | Northern Hemisphere | Papaver spp. |
| Populus | Malpighiales | North America, Eurasia | Populus tremuloides |
| Portulaca | Caryophyllales | Worldwide | Portulaca oleracea |
| Pot Marigold | Asterales | Mediterranean | Calendula officinalis |
| Potato | Solanales | Andes | Solanum tuberosum |
| Potentilla | Rosales | Temperate regions of the Northern Hemisphere | Potentilla reptans |
| Prastium | Lamiales | Mediterranean region | Prastium majus |
| Prenanthes | Asterales | North America, Eurasia | Prenanthes purpurea |
| Prickly Ash | Rutales | North America | Zanthoxylum americanum |
| Prickly Pear | Caryophyllales | Americas | Opuntia spp. |
| Primrose Jasmine | Gentianales | Southern China | Jasminum mesnyi |
| Primula | Ericales | Europe, Asia | Primula veris |
| Prince's Feather | Caryophyllales | Asia | Polygonum orientale |
| Privet | Lamiales | Asia | Ligustrum spp. |
| Prosopis | Fabales | Americas, Africa, Asia | Prosopis juliflora |
| Prunella | Lamiales | Northern Hemisphere | Prunella vulgaris |
| Prunus | Rosales | North America, Eurasia | Prunus serotina |
| Pseudoaniseed | Apiales | Asia | Trachyspermum ammi |
| Pseudowintera | Canellales | New Zealand | Pseudowintera colorata |
| Psychotria | Gentianales | Pantropical | Psychotria spp. |
| Ptelea | Sapindales | Eastern North America | Ptelea trifoliata |
| Pteridium | Polypodiales | Worldwide | Pteridium aquilinum |
| Ptychopetalum | Malpighiales | South America | Ptychopetalum olacoides |
| Pukatea | Laurales | New Zealand | Laurelia novae-zelandiae |
| Pulmonaria | Boraginales | Europe | Pulmonaria officinalis |
| Pulsatilla | Ranunculales | Europe and Asia | Pulsatilla vulgaris |
| Punica | Myrtales | Middle East and Mediterranean | Punica granatum |
| Purple Coneflower | Asterales | Central and eastern North America | Echinacea purpurea |
| Purslane | Caryophyllales | Native to the Middle East, Asia, and Europe, naturalized worldwide | Portulaca oleracea |
| Pycnanthemum | Lamiales | Eastern North America | Pycnanthemum virginianum |
| Pygmy Date Palm | Arecales | Africa | Phoenix reclinata |
| Pyrola | Ericales | Northern hemisphere | Pyrola rotundifolia |