Ononis reclinata
Small Restharrow
Ononis repens
Common Restharrow
Ophioglossum azoricum
Small Adder's-tongue
Ophioglossum vulgatum
Adder's-tongue
Ophrys apifera
Bee Orchid
Ophrys fuciflora
Late Spider-orchid
Ophrys insectifera
Fly Orchid
Orchid 'Butterfly Wings'
Orchis mascula
Early-purple Orchid
Ornithogalum nutans
Drooping Star-of-Bethlehem
Ornithogalum pyrenaicum
Spiked Star-of-Bethlehem
Ornithopus perpusillus
Bird's-foot
Orobanche caryophyllacea
Bedstraw Broomrape
Orobanche hederae
Ivy Broomrape
Orobanche minor
Common Broomrape
Orobanche picridis
Oxtongue Broomrape
Orobanche purpurea
Yarrow Broomrape
Orthilia secunda
Serrated Wintergreen
Osmunda regalis
Royal Fern
Parietaria judaica
Pellitory-of-the-wall
Paris quadrifolia
Herb-paris
Pastinaca sativa
Wild Parsnip
Pedicularis palustris
Marsh Lousewort
Pedicularis sylvatica
Lousewort