Oenanthe fistulosa
Tubular Water-dropwort
Oenanthe silaifolia
Narrow-leaved Water-dropwort
Ononis arvensis
Ononis repens
Common Restharrow
Ophioglossum vulgatum
Adder's-tongue
Ophiopogon jaburan
Giant Lilyturf
Ophrys apifera
Bee Orchid
Ophrys fuciflora
Late Spider-orchid
Ophrys insectifera x apifera
Ophrys sphegodes
Early Spider-orchid
Oplismenus compositus
Running Mountaingrass
Opuntia cochenillifera
Cochineal Cactus
Opuntia ficus-indica
Prickly Pear
Opuntia microdasys
Angel's-wings
Orchis mascula
Early-purple Orchid
Orchis militaris
Military Orchid
Orchis purpurea
Lady Orchid
Orchis simia
Monkey Orchid
Orchis x angusticruris
Lady#Orchid#/ Monkey#Orchid#hybrid
Oreopteris limbosperma
Lemon-scented Fern
Orobanche caryophyllacea
Bedstraw Broomrape
Orobanche picridis
Oxtongue Broomrape
Orobanche rapum-genistae
Greater Broomrape
Orontium aquaticum
Golden-club
Orthilia secunda
Serrated Wintergreen
Osmoxylon lineare
Green Aralia
Osmunda regalis
Royal Fern
Oxalis acetosella
Wood-sorrel
Oxalis corniculata
Creeping Woodsorrel
Oxalis incarnata
Pale Pink-sorrel
Oxalis triangularis
False Shamrock
Oxybasis glauca
Oak-leaved Goosefoot
Pachira glabra
French Peanut
Pachystachus lutea
Golden Shrimp Plant
Pachystachys lutea
Golden Shrimp Plant
Palhinhaea cernua
Staghorn Clubmoss
Pandanus tectorius
Thatch Screwpine
Panicum trichanthum
Thicket Panic Grass
Papaver cambricum
Welsh Poppy
Paris quadrifolia
Herb-paris
Passiflora foetida
Stinking Passionflower
Pedicularis palustris
Marsh Lousewort
Pedicularis sylvatica
Lousewort
Pelargonium zonale
Zonal Geranium
Pentas lanceolata
Egyptian Starcluster
Peperomia pellucida
Pepper Elder
Peperomia polybotrya
Raindrop Peperomia
Pereskia aculeata
Barbados Gooseberry
Persicaria amphibia
Amphibious Bistort
Persicaria chinensis
Creeping Smartweed
Persicaria lapathifolia
Pale Persicaria
Petasites hybridus
Butterbur
Petasites pyrenaicus
Winter Heliotrope
Petasites spurius
Petrorhagia prolifera
Proliferous Pink
Petrosedum forsterianum
Rock Stonecrop
Petrosedum rupestre
Reflexed Stonecrop
Phacelia tanacetifolia
Phacelia
Phalaris arundinacea
Reed Canary-grass
Phanera kockiana
Orange Bauhinia
Phegopteris connectilis
Beech Fern
Phelipanche purpurea
Yarrow Broomrape
Philodendron bipinnatifidum
Split-leaf Philodendron
Philodendron burle-marxii
Burle Marx's Philodendron
Philodendron erebuscens
Blushing Philodendron
Philodendron martianum
Pacová
Phleum pratense
Timothy
Phoenix dactylifera
Date Palm
Phyllanthus urinaria
Chamber Bitter
Phymatosorus scolopendria
Monarch Fern