Genera: A B C D E F G H I J K L M N O P Q-R S T U V W X-Y-Z
Families: A B C D E F G H I J L M N O P R S T U V W-X-Z
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Families - P
Paeoniaceae
Papaveraceae
Paulowniaceae
Pedaliaceae
Penthoraceae
Phrymaceae
Phytolaccaceae
Pinaceae (see also Cupressaceae)
Plantaginaceae
Platanaceae
Plumbaginaceae
Poaceae
Podostemaceae
Polemoniaceae
Polygalaceae
Polygonaceae
Polypodiaceae (see also Aspleniaceae, Athyriaceae,
Blechnaceae, Dennstaedtiaceae, Dryopteridaceae,
Onocleaceae, Pteridaceae, Thelypteridaceae,
Woodsiaceae)
Pontederiaceae
Portulacaceae (see also Montiaceae)
Potamogetonaceae
Primulaceae
Pteridaceae
Pyrolaceae (see Ericaceae)
PAEONIACEAE (Peony Family)
PaeoniaPAPAVERACEAE (Poppy Family)
AdlumiaArgemone
Capnoides
Chelidonium
Corydalis (see also Capnoides)
Dicentra (see also Lamprocapnos)
Eschscholzia
Fumaria
Glaucium
Hylomecon
Lamprocapnos
Macleaya
Papaver
Sanguinaria
PAULOWNIACEAE (Paulownia Family)
PaulowniaPEDALIACEAE (Sesame Family)
SesamumPENTHORACEAE (Penthorum Family)
PenthorumPHRYMACEAE (Lopseed Family)
DiplacusErythranthe
Glossostigma
Mimulus (see also Diplacus & Erythranthe)
Phryma
PHYTOLACCACEAE (Pokeweed Family)
PhytolaccaPINACEAE (Pine Family)
AbiesLarix
Picea
Pinus
Pseudotsuga
Tsuga
PLANTAGINACEAE (Plantain Family)
Antirrhinum (see also Misopates)Callitriche
Chaenorhinum
Chelone
Collinsia
Cymbalaria
Digitalis
Gratiola
Hippuris
Kickxia
Linaria (see also Nuttallanthus)
Littorella
Misopates
Nuttallanthus
Penstemon
Plantago
Pseudolysimachion (See Veronica)
Veronica
Veronicastrum
PLATANACEAE (Sycamore Family)
PlatanusPLUMBAGINACEAE (Leadwort Family)
LimoniumPOACEAE (Grass Family)
Agropyron (see also Elymus, Pascopyrum and Thinopyrum)Agrostis (see also Apera)
Aira
Alopecurus
Ammophila
Amphicarpum
Andropogon (see also Schizachyrium)
Anthoxanthum
Apera
Aristida
Arrhenatherum
Arthraxon
Arundinaria (See Pseudosasa)
Avena (see also Avenula and Ventenata)
Avenella
Avenula
Beckmannia
Bouteloua
Brachyelytrum
Brachypodium
Briza
Bromus
Calamagrostis
Catapodium
Cenchrus
Chasmanthium
Chloris
Cinna
Coleataenia
Corynephorus
Crypsis
Cynodon
Cynosurus
Dactylis
Dactyloctenium
Danthonia
Deschampsia (see also Avenella and Vahlodea)
Desmazeria (See Catapodium)
Dichanthelium
Digitaria
Dinebra
Diplachne
Distichlis
Echinochloa
Eleusine
Elymus (see also Leymus, Taeniatherum and Thinopyrum)
Elytrigia (see Elymus and Thinopyrum)
Eragrostis
Festuca (see also Lolium and Vulpia)
Gastridium
Glyceria (see also Torreyochloa)
Graphephorum
Heleochloa (see Crypsis)
Helictotrichon (see Avenula)
Hierchloë (See Anthoxanthum)
Holcus
Hordeum
Hystrix (See Elymus)
Koeleria
Leersia
Leptochloa (see Diplachne and Dinebra)
Leptoloma (see Digitaria)
Leymus
Lolium
Lycurus (see Muhlenbergia)
Microstegium
Milium
Miscanthus
Molinia
Muhlenbergia
Nardus
Oryzopsis (see also Patis and Piptatheropsis)
Panicum (see also Dichanthelium, Coleataenia and Urochloa)
Pappophorum
Pascopyrum
Paspalum
Patis
Phalaris
Phleum
Phragmites
Phyllostachys
Piptatheropsis
Piptatherum (see Patis)
Piptochaetium
Poa
Polypogon
Pseudosasa
Puccinellia (see also Torreyochloa)
Schizachne
Schizachyrium
Scleropoa (see Catapodium)
Secale
Setaria
Sorghastrum
Sorghum
Spartina
Sphenopholis
Sporobolus
Stipa (see Piptochaetium)
Taeniatherum
Thinopyrum
Torreyochloa
Tragus
Tridens
Triodia (see Tridens)
Triplasis
Tripsacum
Triraphis
Trisetum (see also Graphephorum and Sphenopholis)
Triticum
Uniola (See Chasmanthium)
Urochloa
Vahlodea
Ventenata
Vulpia
Zea
Zizania
Zoysia
PODOSTEMACEAE (Riverweed Family)
PodostemumPOLEMONIACEAE (Phlox Family)
CollomiaGilia (see also Ipomopsis)
Ipomopsis
Navarretia
Phlox
Polemonium
POLYGALACEAE (Milkwort Family)
PolygalaPolygaloides)
POLYGONACEAE (Knotweed Family)
AconogononBistorta
Chorizanthe
Emex
Fagopyrum
Fallopia
Oxyria
Persicaria
Polygonella (See Polygonum)
Polygonum (see also Bistorta, Fallopia and Persicaria)
Reynoutria
Rheum
Rumex
Tovara (see Persicaria)
POLYPODIACEAE (Polypody Family)
PolypodiumPONTEDERIACEAE (Pickerelweed Family)
EichhorniaHeteranthera
Pontederia
Zosterella (see Heteranthera)
PORTULACACEAE (Purslane Family)
ClaytoniaPortulaca
POTAMOGETONACEAE (Pondweed Family)
Potamogeton (see also Stuckenia)Stuckenia
Zannichellia
PRIMULACEAE (Primrose Family)
Anagallis (see Lysimachia)Androsace
Centunculus (see Lysimachia)
Glaux (see Lysimachia)
Hottonia
Lysimachia
Naumbergia (see Lysimachia)
Primula
Samolus
Steironema (see Lysimachia)
Trientalis (see Lysimachia)
PTERIDACEAE (Maidenhair Fern Family)
AdiantumCheilanthes (see Myriopteris)
Cryptogramma
Myriopteris
Pellaea
Designed by Ray Angelo. Revised March 16, 2023