Nigel Cattlin / Cow parsley (Anthriscus sylvestris) foliage with green, fern-like, leaves on roadside verge, Berkshire, May

Nigel Cattlin / Cow parsley (Anthriscus sylvestris) stem node on wild umbellifer, Berkshire, England, UK. June

Nigel Cattlin / Cowbane (Cicuta virosa) white poisonous flowering plants beside the Kennet and Avon Canal, Berkshire, June Berkshire, England, UK.

Nigel Cattlin / Cow parsley (Anthriscus sylvestris) purple tinted, ridged stem node of common roadside umbellifer in spring

Nigel Cattlin / Cow parsley (Anthriscus sylvestris) section through hollow ridged smooth-haired stem, June, Berkshire

Nigel Cattlin / Cow parsley (Anthriscus sylvestris) purple tinted, ridged stem node. Berkshire, England, UK, May.

Nigel Cattlin / Cow parsley (Anthriscus sylvestris) section through hollow ridged smooth-haired stem, June, Berkshire

Nigel Cattlin / Large flower heads of Euphorbia characias 'Black Pearl' plant in full flower, Berkshire, April Berkshire, England, UK.

Nigel Cattlin / Autumn lady's tresses (Spiranthes spiralis), a small orchid with white flowers on Greenham Common, Berkshire, September

Nigel Cattlin / Autumn lady's tresses (Spiranthes spiralis), a small orchid with white flowers on Greenham Common, Berkshire, September

Nigel Cattlin / Young leaves and flowers of a Greater celandine, (Chelidonium majus) in spring, Berkshire, May

Nigel Cattlin / Cowbane (Cicuta virosa) white poisonous flowering plants beside the Kennet and Avon Canal, Berkshire, June Berkshire, England, UK. June.

Nigel Cattlin / Ground elder, goutweed / bishop's weed, (Aegopodium podograria) flowering plants Berkshire, England, UK. June.

Nigel Cattlin / Hogweed (Heracleum sphondylium) plant white flowering umbels and flower buds, Berkshire, England, UK. June

Nigel Cattlin / Perennial sow-thistle / field sowthistle (Sonchus arvensis) plant rosette in waste cultivated ground, Berkshire, England, UK. July

Nigel Cattlin / Mullein moth (Cucullia verbasci) caterpillar feeding on large yellow ornamental garden Mullein, (Verbascum sp), Berkshire, June

Nigel Cattlin / Ground elder (Aegopodium podograria) plant from a vegetable patch sampled to show creeping rhizomatous roots Berkshire, England, UK.

Nigel Cattlin / Carnation tortrix (Cacoecimorpha pronubana) caterpillar feeding and binding the leaves of red valerian (Centranthus ruber) Berkshire, England, UK. September

Nigel Cattlin / Carnation tortrix (Cacoecimorpha pronubana) caterpillar feeding and binding the leaves of red valerian (Centranthus ruber) Berkshire, England, UK. September

Paul Harcourt Davies / Perennial hyoseris (Hyoseris radiata) in flower among rocks, Gargano, Puglia, Italy. April.

Paul Harcourt Davies / Perennial flax (Linum perenne) in flower, nr Monte St Angelo, Gargano, Puglia, Italy. April.

Paul Harcourt Davies / Perennial flax (Linum perenne) in flower, nr Monte St Angelo, Gargano, Puglia, Italy. April.

Jouan & Rius / Mountain bluet (Centaurea montana) in flower, Picardie, France.

Konrad Wothe / Quaking grass (Briza media) among wildflowers in mountain meadow, Upper Bavaria, Germany. June.

Paul Harcourt Davies / Mountain lettuce (Lactuca perennis) flowering in limestone pasture, Sibillini, Umbria, Italy. June.

Paul Harcourt Davies / Perennial flax (Linum perenne) in flower, Puglia, Italy. April.

Paul Harcourt Davies / Eastern leopard's bane (Doronicum columnae), in flower, herbaceous perennial plant found throughout the mountains of Central and Southern Italy, Terminillo, Umbria Italy, May.

Paul Harcourt Davies / Meadow clary (Salvia pratense) a tall perennial plant, in flower, Piano Grande, Umbria, Italy. May.

Nigel Cattlin / Common mallow (Malva sylvestris) purple-pink flowers with dark stripes on perennial plant, Berkshire, UK. July.

Paul Harcourt Davies / Perennial honesty (Lunaria rediviva) in flower, Umbria, Italy. May.

Ugo Mellone / Pancratium sp. flowering, Djebel Ouarkziz, Southern Morocco, Africa.

John Waters / Quaking-grass (Briza media) along with unidentified spider on stem, flower-rich meadow, Daneway Banks, Stroud, Gloucestershire, UK, June.

Nigel Cattlin / Areas of garden allowed to grow undisturbed to encourage wildlife and wildflowers in high summer. Refuges for invertebrates, predators for biological control, Berkshire, UK, July.

Nigel Cattlin / Areas of garden allowed to grow undisturbed to encourage wildlife and wildflowers in high summer. Refuges for invertebrates, predators for biological control, Berkshire, UK, July.

Nigel Cattlin / Areas of garden allowed to grow undisturbed to encourage wildlife and wildflowers in high summer. Refuges for invertebrates, predators for biological control, Berkshire, UK, July.

Nigel Cattlin / Two-spotted spider mite (Tetranychus urticae) grazing damage to the leaves of a perennial pot plant Nemesia, Berkshire, England, UK, June

Nigel Cattlin / Red hot poker (Knipohofia sp.) ornamental perennial flower spike of red and yellow florets opening from the bottom, Berkshire, England, June

Nigel Cattlin / Unripe passion fruits (Passiflora edulis) crop hanging on the vine before ripening and harvest, Thailand

Nick Upton / Perennial sow-thistle (Sonchus arvensis) clump flowering on a field margin, Wiltshire, UK, September.

Nick Upton / Perennial sow-thistle (Sonchus arvensis) clump flowering on a field margin, Wiltshire, UK, September.

Nick Upton / Perennial sow-thistle (Sonchus arvensis) clump flowering on a field margin, Wiltshire, UK, September.

Nick Upton / Quaking grass (Briza media) flowering on a chalk grassland slope, northeast Somerset, England, UK. May.

Nick Upton / Quaking grass (Briza media) flowering on a chalk grassland slope, northeast Somerset, England, UK. May.

Nick Upton / Meadow plant bug (Leptopterna dolabrata) nymph well camouflaged on a flowering Quaking grass (Briza media), in a chalk grassland meadow, Wiltshire, UK, May

Nick Upton / Meadow plant bug (Leptopterna dolabrata) nymph well camouflaged on a flowering Quaking grass (Briza media), in a chalk grassland meadow, Wiltshire, UK, May

Cyril Ruoso / Cheerful sunflower (Helianthus laetiflorus) flowering, Occurs in North America, naturalised in Bourgogne-Franche-Comte, France. October.

Nigel Cattlin / Old pheasant's eye (Narcissus poeticus var. recurvus) flowers, division 13 daffodil with white perianth and yellow and red corona, Berkshire, England, UK, April

Nigel Cattlin / Old pheasant's eye (Narcissus poeticus var. recurvus) flowers, division 13 daffodil with white perianth and yellow and red corona, Berkshire, England, UK, April

Nigel Cattlin / Flower of a Common daisy (Bellis perennis) with white ray and yellow disc florets growing in a garden lawn, Berkshire, England, UK, April ,

Nigel Cattlin / Summer snowflake or Loddon lily (Leucojum aestivum) flowers backlit by spring afternoon sunshine, Berkshire. April

Nigel Cattlin / Summer snowflake or Loddon lily (Leucojum aestivum) flowers backlit by spring afternoon sunshine, Berkshire. April

Nigel Cattlin / Cowslips (Primula veris) a multi-headed primula in full flower and backlit by the afternoon sun, April, Berkshire

Nigel Cattlin / Cowslips (Primula veris) a multi-headed primula in full flower and backlit by the afternoon sun, April, Berkshire

Nigel Cattlin / Turkish sage (Phlomis russeliana) with a whorl of yellow hooded flowers being visited by a bumble bee, Berkshire, England, UK, June

Nigel Cattlin / Chlorosis on stinging nettles (Urtica diocia) caused by glyphosate weedkiller in the early stages of weed control after spraying. Treatment weakens the plant and gets drawn into the root system, Berks...

Nigel Cattlin / Snowdrops (Galanthus nivalis) wilted on a cold frosty morning as the sun reaches them when they will revive, Berkshire, England, UK. February

Nigel Cattlin / Himalayan honeysuckle (Leycesteria formosa) racemes of white flowers with red purple bracts on a deciduous garden shrub, August

Nigel Cattlin / Early chlorosis on stinging nettles caused by glyphosate weedkillerafter spraying. Treatment weakens the plant and gets drawn into the root system

Nigel Cattlin / Onion couch or false oat grass (Arrhenatherum elatius) grass weed culms scattered on the soil after rotavation

Nigel Cattlin / Leaf blotch (Rhynchosporium secalis) fungal disease lesions on ryegrass (Lolium perenne) leaves

Nigel Cattlin / Young prostrate Perennial sow-thistle (Sonchus arvensis) perennial young weed plants on arable ground, Berkshire, July

Nigel Cattlin / Couch grass rhizomes (Elymus repens), dug up from an established vegetable garden and capable of invasive regrowth Berkshire, England, UK.

Nigel Cattlin / Seedling Stinging nettle (Urtica dioica) perennial stinging weed of gardens, wasteground and hedgerows with several true leaves

Linda Pitkin / Perennial sow-thistle (Sonchus arvensis) Ranscombe Farm Nature Reserve, Medway, Kent, England, July.

Linda Pitkin / Perennial sow-thistle (Sonchus arvensis), flower and buds. Bealeswood Common, Surrey, England, September.

Linda Pitkin / Perennial wall-rocket (Diplotaxis tenuifolia) Wandsworth, River Wandle, Surrey, England, August.

Nigel Cattlin / Hedge bindweed (Calystegia sepium) a garden weed, Berkshire, England, UK, September

Nigel Cattlin / Flowering Hedge bindweed (Calystegia sepium) a garden weed, Berkshire, England, UK, September

Nigel Cattlin / Wild or yellow mignonette (Reseda lutea) flowering plant in front of an electric sheep fence on chalk downland, Berkshire, England, UK, May.

Nigel Cattlin / Wild or yellow mignonette (Reseda lutea) flowering plant in front of an electric sheep fence on chalk downland, Berkshire, England, UK, May.

Nigel Cattlin / Milkwort (Polygala vulgaris) flowering bright blue beside a chalk downland path in early summer, Berkshire, England, UK, May

Nigel Cattlin / Pignut (Conopodium majus) a small umbellifer flowering in chalk dwnland grassland, Berkshire, England, UK, May

Nigel Cattlin / Pignut (Conopodium majus) a small umbellifer flowering in chalk dwnland grassland, Berkshire, England, UK, May

Nigel Cattlin / Field buttercups (Ranunculis acris) flowering perennial herbaceous weed in grass pasture, Berkshire, England, UK, June

Nigel Cattlin / Red clover (Trifolium pratense) flower.

Nigel Cattlin / Red clover (Trifolium pratense) flower.

Nigel Cattlin / Yellow meadow buttercup (Ranunculus acris) against a black background

Nigel Cattlin / Flowering Ribwort or Narrowleaf plantain (Plantago lanceolata) plant flowering in waste ground in spring, Berkshire, England, UK, May

Nigel Cattlin / Red campion (Silene dioica) male plant flowers of wild hedgerow dioecious plant in spring, Berkshire, England, UK

Nigel Cattlin / Meadow foxtail (Alopecurus pratensis) in a group in grassland, Berkshire, England, UK, May

Nigel Cattlin / Meadow foxtail (Alopecurus pratensis) in a group in grassland, Berkshire, England, UK, May

Nigel Cattlin / Tufted or bird vetch (Vicia cracca) in blue purple flower among chalk downland vegetation, Berkshire, England, UK, July

Nigel Cattlin / Dwarf thistle (Cirsium acaule) stemless purpl;e flowering thistle in short calcareous grassland, Berkshire, England, UK, July

Nigel Cattlin / Young raspberry leaves and early flower buds on supported soft fruit plants in a garden, Berkshire, England, UK, April

Nigel Cattlin / Moschatel or five-faced bishop (Adoxa moschatellina) single flower of very small woodland plant, Berkshire, England, UK, April

Nigel Cattlin / Flower whorl and leaves of white dead-nettle (Lamium album) showing anthers, shape and structure. Berkshire,England,UK,April

Nigel Cattlin / Section through blue flower of garden ornamental Anemone coronaria with petals, sepals, calyx, central anthers, stamens, stigma and style

Nigel Cattlin / Blue flower of garden ornamental Anemone coronaria with petals, sepals, calyx, central anthers, stamens, stigma and style

Nigel Cattlin / Severe infestation of couch, twitch or quackgrass (Agropyron repens) perennial grass weeds in a strawberry crop

Nigel Cattlin / Couch (Agropyron repens) perennial rhizomatous grass weed infestation in a cabbage crop

Philippe Clement / Good-King-Henry / Poor-man's Asparagus (Blitum bonus-henricus) in flower, native to Europe. May