Perennial Cornflower (centaurea Montana)
Tony Wood/science Photo Library
Centaurea Montana
Sam K Tran/science Photo Library
Isotoma Axillaris 'fizz 'n' Pop Purple' Flowers #1
Ian Gowland/science Photo Library
Abnormal Thistle Stem
Dr Keith Wheeler/science Photo Library
Great Burnet (sanguisorba Officinalis)
Bildagentur-online/th Foto/science Photo Library
Herb Garden #2
Dan Sams/science Photo Library
Anemone Flower #1
Catherine Lewis/science Photo Library
Anemone Petals
Catherine Lewis/science Photo Library
Anemone Petals #1
Catherine Lewis/science Photo Library
Ajuga Reptans 'black Scallop'
Geoff Kidd/science Photo Library
Anemone Flower
Catherine Lewis/science Photo Library
Timothy Grass
Maurice Nimmo/science Photo Library
Aeonium Haworthii
Geoff Kidd/science Photo Library
Aeonium Arboreum 'zwartkop'
Geoff Kidd/science Photo Library
Pulsatilla Vulgaris 'rubra'
Maria Mosolova/science Photo Library
Oriental Lily (lilium Sp.) Flower
Maria Mosolova
Perennial Flax Flowers
Rachel Warne/science Photo Library
Perennial Cornflower
Archie Young/science Photo Library
Perennial Flax
Andy Williams/science Photo Library
Perennial Flax (linum Perenne)
Rachel Warne/science Photo Library
Perennial Grass
Jane Sugarman/science Photo Library
Perennial Ryegrass
Matt Johnston/science Photo Library
Perennial Cornflower (centaurea Montana)
Rachel Warne/science Photo Library
Perennial Impatiens (impatiens Omeiana)
Geoff Kidd/science Photo Library
Perennial Ryegrass #1
Matt Johnston/science Photo Library
Perennial Ryegrass (lolium Perenne) Seed
Frank Fox/science Photo Library
Perennial Ryegrass (lolium Perenne) Seed #1
Frank Fox/science Photo Library
Perennial Ryegrass (lolium Perenne) Seeds
Frank Fox/science Photo Library
Perennial Cornflower (centaurea Montana)
Dr. Nick Kurzenko/science Photo Library
Perennial Candytuft (iberis Sempervirens) In Flower
Bob Gibbons/science Photo Library
Red Valerian (centranthus Ruber) Flowers
Bruno Petriglia
Aeonium Arboreum 'voodoo' Leaves Abstract
Nigel Downer
Chrysanthemum 'ruby Raynor'
Anthony Cooper/science Photo Library
Ox-eye Daisies (leucanthemum Vulgare)
Gustoimages/science Photo Library
Aquilegia Caerulea
Mike Comb/science Photo Library
Winter Acconite And Crocus Flowers
Sheila Terry/science Photo Library
Ranunculus Repens
Annie Poole/science Photo Library
Wolfsbane (aconitum Lycoctonum) #2
Natural History Museum, London/science Photo Library
Rosa 'perennial Blue' Flowers
Maria Mosolova
Poppies And Perennial Flax
Andy Williams/science Photo Library
Summer Herbaceous Perennials
Mike Comb/science Photo Library
Birdbath With Pots Of Perennials
Geoff Kidd/science Photo Library
Pasque Flowers (pulsatilla Vulgaris)
Dan Sams/science Photo Library
Sempervivum Calcareum
Joseph Malcolm Smith/science Photo Library
Hosta Flowers
Duncan Smith/science Photo Library
Foxglove Seed Surface (digitalis Purpurea) #1
Dennis Kunkel Microscopy/science Photo Library
Typha Angustifolia
Chris Martin Bahr/science Photo Library
Water Lily (nymphaea 'colorado')
Maria Mosolova/science Photo Library
Golden Pothos (epipremnum Pinnatum)
Maria Mosolova/science Photo Library
Purple Saxifrage (saxifraga Oppositifolia
Adrian T Sumner/science Photo Library
Centranthus Ruber.
Maxine Adcock/science Photo Library
Phalaenopsis 'sweetheart' Orchid Flowers
Maria Mosolova
Cobra Lily (arisaema Candidissimum)
Dr Jeremy Burgess/science Photo Library
Oxalis Acetosella
Tim Rayner/science Photo Library
Marsh Marigolds (caltha Palustris)
Dr Keith Wheeler/science Photo Library
Dahlia 'jubilee Boy'
Anthony Cooper/science Photo Library
Dahlia Flowers #2
Dr Keith Wheeler/science Photo Library
Bears Breeches (acanthus Spinosus)
Dr Keith Wheeler/science Photo Library
Peony (paeonia Lactiflora)
Maria Mosolova/science Photo Library
Iris Flowers (iris Sp.)
Maria Mosolova/science Photo Library
Aquilegia Canadensis 'little Lanterns'
Geoff Kidd/science Photo Library
Arctic Sea Ice #1
Nasa/gsfc-svs/science Photo Library
Hellebore (helleborus Niger)
Dr Keith Wheeler/science Photo Library
Dahlia Sp #1
Maria Mosolova/science Photo Library
Oriental Lily (lilium 'mona Lisa') #2
Ann Pickford/science Photo Library
Yarrow (achillea 'fanal' ) Flowers
Adrian Thomas
Helleborus 'white Christmas' #1
Dr Keith Wheeler/science Photo Library
Dahlia Flowers #22
Dr Keith Wheeler/science Photo Library
Dahlia Flowers (dahlia 'shandy')
Ian Gowland/science Photo Library
Heuchera Micrantha 'palace Purple'
Ian Gowland/science Photo Library
Dahlia Flower (dahlia Sp.) #2
Gustoimages/science Photo Library
Peony (paeonia Lactiflora) #1
Maria Mosolova/science Photo Library