Common Name

Scientific Name

Common Name

Scientific Name

Pacific madrone

Arbutus menziesii

Peat mosses

Sphagnum spp.

Pacific willow

Salix lasiandra

Pecan

Carya illinoensis

Pacific yew

Taxus brevifolia

Pencil marks lichen

Graphis scripta

Paintbrush, Indian

Castilleja spp.

Pencil tree

Euphorbia tirucatti

Palm, betel nut

Areca catechu

Penicillin mold

Penicittium notatum

Palm, coconut

Cocos nucifera

Peony

Paeonia spp.

Palm, date

Phoenix dactylifera

Peperomia

Peperomia spp.

Palm, fishtail

Caryota mens

Pepper

Capsicum annuum

Palm, oil

Elaeis guineensis

Pepper

Piper nigrum

Palm, Panama hat

Carludovica palmata

Peppermint

Mentha piperita

Palm, ponytail

Beaucarnea recurvata

Periwinkle

Vinca major

Palm, royal

Roystonea regia

Periwinkle, Madagascar

Catharanthus roseus

Palm, sago

Cycas revoluta

Persimmon, common

Diospyros virginiana

Palm, sea

Postelsia palmaeformis

Petunia

Petunia hybrida

Palm, Seychelles

Lodoicea maldivica

Philodendron, split leaf

Monstera deliciosa

Palm, travelers

Ravenala madagascariensis

Photinia, Chinese

Photinia serrulata

Palmetto, cabbage

Sabal palmetto

Pickerel weed

Pontederia cordata

Palmetto, saw

Serenoa repens

Pigweed

Amaranthus retroflexus

Palms, rattan

Calamus spp.

Pimpernel, scarlet

Anagallis arvensis

Palo verde

Cercidium torreyanum

Pin oak

Quercus palustris

Pampas grass

Cortaderia selloana

Pincushion flower

Scabiosa atropurpurea

Panama hat palm

Carludovica palmata

Pine, Austrian

Pinus nigra

Papaya

Carica papaya

Pine, bristlecone

Pinus aristata

Paper birch

Betula papyrifiera

Pine, Buddhist

Podocarpus macrophyllus

Paper rush

Cyperus papyrus

Pine, coulter

Pinus coulteri

Paradise tree

Simarouba glauca

Pine, eastern white

Pinus strobus

Parrot fever pathogen

Chlamydia psittaci

Pine, limber

Pinus flexilis

Parsley

Petroselinum crispum

Pine, loblolly

Pinus taeda

Parsnip

Pastinaca sativa

Pine, lodgepole

Pinus contorta

Pasque flower, American

Pusatilla hirsutissima

Pine, Norfolk Island

Araucaria heterophylla

Passion flower

Passiflora caerulea

Pine, pinyon

Pinus edulis

Passionfruit

Passiflora edulis

Pine, ponderosa

Pinus ponderosa

Pathogen, acne

Propionibacterium acnes

Pine, red

Pinus resinosa

Pathogen, anthrax

Bacillus anthracis

Pine, running

Lycopodium clavatum

Pathogen, apple scab

Enturia inaequalis

Pine, Scotch

Pinus sylvestris

Pathogen, botulism

Clostridium botulinum

Pine, screw

Pandanus amaryttifolius

Pathogen, brown rot

Monilinia fructicola

Pine, slash

Pinus elliottii

Pathogen, damping-off

Pythium spp.

Pine, southern

Pinus palustris

Pathogen, dark leaf spot

Alternaria brassicicola

Pine, sugar

Pinus lambertiana

Pathogen, Dutch elm

Ophiostoma ulmi

Pine, western white

Pinus monticola

Pathogen, foolish seedling

Gibberella fujikuroi

Pine, wollemi

Wottemia nobilis

Pathogen, leprosy

Mycobacterium leprae

Pineapple

Ananas comosus

Pathogen, lyme disease

Borrelia burgdorferi

Pink lady's slipper

Cypripedium acaule

Pathogen, parrot fever

Chlamydia psittaci

Pink mold

Neurospora crassa

Pathogen, plague

Yersinia pestis

Pinyon, single-leaf

Pinus monophylla

Pathogen, potato blight

Phytophthora infestans

Pinyon pine

Pinus edulis

Pathogen, powdery

Plasmopara viticola

Pistachio

Pistacia vera

mildew

Pitcher plant, California

Darlingtonia californica

Pathogen, thrush

Candida albicans

Pitcher plant, East Indian

Nepenthes reinwardtiana

Paulownia, royal

Paulownia tomentosa

Plague pathogen

Yersinia pestis

Pawpaw

Asimina triloba

Plains cottonwood

Populus sargentii

Pea, black-eyed

Vigna unguiculata

Plantain

Musa x paradisiaca

Pea, garden

Pisum sativum

Plantain

Plantago lanceolata

Peach

Prunus persica

Plantain

Plantago major

Peacock's tail

Padina pavonia

Plantain lily

Hosta ventricosa

Peanut

Arachis hypogaea

Plasmodial slime mold

Physarum polycephalum

Pear

Pyrus communis

Plum, American

Prunus americana

Ponderosa pine

Pinus ponderosa

Plum, chickasaw

Prunus angustifolia

Pondweed

Potamogeton spp.

Plum, hog

Ximenia americana

Ponytail palm

Beaucarnea recurvata

Poinsettia

Euphorbia pulcherrima

Poplar, lombardy

Populus nigra

Poison hemlock

Conium maculata

Poplar, white

Populus alba

Poison sumac

Toxicodendron vernix

Poplar, yellow

Liriodendron tulipifera

Pokeweed

Phytolacca americana

Poppy, California

Eschscholzia californica

Polyanthus daffodil

Narcissus tazetta

Poppy, opium

Papaver somniferum

Polypore, resinous

Ischnoderma resinosum

Port-Orford cedar

Chamaecyparis lawsoniana

Pomegranate

Punica granatum

Post oak

Quercus stellata

Primrose, cape

Streptocarpus spp.

Potato

Solanum tuberosum

Primrose, evening

Oenothera biennis

Potato, sea

Leathesia difformis

Privet

Ligustrum vulgare

Potato, sweet

Ipomoea batatas

Protea, giant

Protea cynaroides

Potato blight pathogen

Phytophthora infestans

Psathyrella, ringed

Psathyrella longistriata

Powder puff lichen

Cladonia stellaris

Puffball, western giant

Calvatia booniana

Powdery mildew

Plasmopara viticola

Pumpkin

Cucurbita moschata

pathogen

Pumpkin, giant

Cucurbita maxima

Prairie gentian

Eustoma exaltatum

Pumpkin, miniature

Cucurbita pepo

Prairie rose

Rosa pranticola

Puncture vine

Tribulus terrestris

Prayer plant

Maranta leuconeura

Purple coneflower

Echinacea purpurea

Prickly pear

Opuntia polyacantha

Purple heart

Setcreasea pallida

Primrose

Primula vulgaris

Purple nonsulfur

Rhodospirillum rubrum

Purslane

Portulaca oleracea

bacterium

Pussy willow

Salix discolor