Andy Sands / Green veined white butterfly (Pieris napi) captive, on flower of Greater stitchwort (Stellaria holostea), UK.

Nigel Cattlin / Chickweed (Stellaria media) flowers amongst leaves, an annual arable weed. Berkshire, England, UK. August.

Nigel Cattlin / Chickweed (Stellaria media), an annual arable weed. Berkshire, England, UK. August.

Nigel Cattlin / Chickweed (Stellaria media), an annual arable weed. Berkshire, England, UK. August.

Ernie Janes / Bluebells (Hyacinthoides non-scripta) and Greater stitchwort (Stellaria holostea) Blickling Great Wood, Norfolk, England, UK, May.

Ernie Janes / Bluebells (Hyacinthoides non-scripta) and Greater stitchwort (Stellaria holostea) Blickling Great Wood, Norfolk, England, UK, May.

Nigel Cattlin / Chickweed (Stellaria media) seedling with two cotyledons and two true leaves developing. Considered an agricultural weed.

Chris Mattison / Greater stitchwort (Stellaria holostea) flower. Monmouthshire, Wales, UK

Andy Sands / Wood white butterfly (Leptidea sinapis) on Greater stitchwort (Stellaria holostea), Surrey, England, UK, May - Focus Stacked

Andy Sands / Greater stitchwort (Stellaria holostea) Hertfordshire, England, UK, April - Focus stacked image.

Ernie Janes / Bluebells (Hyacinthoides non-scriptus) and Greater stitchwort (Stellaria holostea), in woodland, Norfolk, England, UK, May.

Ernie Janes / Bluebells (Hyacinthoides non-scripta) Red campion (Silene dioica) Greater stitchwort (Stellaria holostea) growing on field boundary, Norfolk, England, UK, May

Nick Upton / Water chickweed (Mysosoton aquaticum / Stellaria aquaticum) flowering beside a small stream, Winfrith Heath, Dorset, UK, July.

Nick Upton / Close up of Water chickweed (Mysosoton aquaticum / Stellaria aquaticum) flowering beside a small stream, Winfrith Heath, Dorset, UK, July.

Stephen Dalton / Greater stitchwort (Stellaria holostea) flowers, Sussex, England, UK. April.

Stephen Dalton / Germander speedwell (Veronica chamaedrys) with Lesser stitchwort (Stellaria graminea) Sussex, England April.

Nick Upton / Greater stitchwort (Stellaria holostea) flowering on the grassy banked verge of a country lane, Cornwall, UK, April.

Nick Upton / Greater stitchwort (Stellaria holostea) flowering on the grassy banked verge of a country lane, Cornwall, UK, April.

David Tipling / Bluebells (Hyacinthoides non-scripta), Lesser celandine (Ranunculus ficaria) and Greater stitchwort (Stellaria holostea) Foxley Wood, Norfolk, UK, April 2014.

Rod Williams / Lesser Stitchwort (Stellaria graminea) Brockley cemetery, Lewisham, South East London, England, UK, June

Fabrice Cahez / Greater stitchwort (Stellaria holostea) Vosges, France, April.

Chris Mattison / Greater stitchwort flower (Stellaria holostea), Cumbria, UK. April.

Fabrice Cahez / Greater stitchwort (Stellaria holostea) flowers, Vosges, France, June.

Jussi Murtosaari / Small Yellow Underwing moth (Panemeria tenebrata) on stitchwort (Stellaria) South Karelia, southern Finland, June.

Jussi Murtosaari / Small Yellow Underwing moth (Panemeria tenebrata) on stitchwort (Stellaria) South Karelia, southern Finland, June.

Colin Varndell / Water chickweed (Stellaria aquaticum) flower. Dorset, UK June

Adrian Davies / Greater stitchwort (Stellaria holostea), Surrey, England, UK, May.

Ernie Janes / Greater Stitchwort (Stellaria holostea) and Bluebells (Hyacinthoides non-scripta) in flower, UK, May

Ernie Janes / Greater Stitchwort (Stellaria holostea) and Bluebells (Hyacinthoides non-scripta) in flower, UK

Ingo Arndt / Sun Carrier Shell (Stellaria solaris) from Australia, Meeresmuseum Ozeania, Riedenburg, Germany

Ingo Arndt / Sun Carrier Shell (Stellaria solaris), Meeresmuseum Ozeania, Riedenburg, Germany

Stephen Dalton / Bank with Greater stitchwort (Stellaria holostea) Bluebells (Endymion non-scriptus), England, UK, April

Colin Varndell / Greater stitchwort (Stellaria holostea) flowers in country hedgebank, Dorset, UK May

Colin Varndell / Water chickweed (Stellaria aquaticum) in flower, Dorset, England, UK, June

Ernie Janes / Red Campion (Silene dioica) bluebells (Hyacithoides nonscriptus) and stitchwort (Stellaria sp) in a country lane, Norfolk, UK, May

Colin Varndell / Greater stitchwort (Stellaria holostea) flowers, Dorset, UK, May

Philippe Clement / Greater Stitchwort / Addersmeat (Stellaria holostea) in flower. Luxembourg, April.

Ernie Janes / Greater Stitchwort (Stellaria holostea) in early April. UK.

Adrian Davies / Greater Stitchwort (Stellaria holostea) with Bluebells. Surrey, England, May

Robert Thompson / Greater stichwort (Stellaria holostea) flowers, Montiaghs Moss NNR, County Antrim, Northern Ireland, UK, May

Michael Hutchinson / Greater Stitchwort (Stellaria holostea) flower, North Somerset, UK

Simon Colmer / Greater stitchwort (Stellaria holostea) in flower, Sussex, UK

Simon Colmer / Greater stitchwort (Stellaria holostea) in flower, Sussex, UK

Gary K. Smith / Greater Stitchwort {Stellaria holostea} growing on roadside verge, Norfolk, UK, April

Paul Hobson / Greater Stitchwort (Stellaria holostea) flowers, Peak District NP, UK

Paul Hobson / Greater Stitchwort (Stellaria holostea) flowers, Peak District NP, UK

MYN / Niall Benvie / Wood stitchwort {Stellaria nemorum} in bloom, Angus, Scotland, UK meetyourneighbours.net project

John Waters / Hedgerow vegetation dominated by Greater Stitchwort {Stellaria holostea} Somerset, UK.

Philippe Clement / Greater stitchwort flowers {Stellaria holostea} France

Philippe Clement / Greater stitchwort flower {Stellaria holostea} France

John Downer / Greater stichwort (Stellaria holostea). Gloucestershire, England, UK, Europe

Mike Read / Greater stitchwort (Stellaria holostea), Bluebells (Hyacinthoides non-scripta) and Soft shield fern (Polystichum setiferum) in deciduous woodland, Naddle Forest, RSPB Haweswater Nature Reserve, Lake D...

Guy Edwardes / Bluebells (Hyacinthoides non-scripta) and Greater stitchwort (Stellaria holostea) in flower on woodland floor in spring, Coney's Castle, Marshwood, Dorset, England, UK. May.

Terry Whittaker / Bluebells (Hyacinthoides non-scripta) and Greater stitchwort (Stellaria holostea) in flower in Oak (Quercus robur) woodland, Carstramon Wood, Dumfries and Galloway, Scotland, UK. May.

Terry Whittaker / Bluebells (Hyacinthoides non-scripta) and Greater stitchwort (Stellaria holostea) in flower in Oak (Quercus robur) woodland, Carstramon Wood, Dumfries and Galloway, Scotland, UK. May.

Ross Hoddinott / Greater stitchwort (Stellaria holostea) flowering, Broxwater, Cornwall, UK. May.

Linda Pitkin / Bog stitchwort (Stellaria alsine) in flower. Farley Heath, Surrey, UK. June.

Linda Pitkin / Lesser stitchwort (Stellaria graminea) in flower. Nutfield Marsh Nature Reserve, Surrey, UK. June.

Nigel Cattlin / Chickweed (Stellaria media) flowering in a garden container, Berkshire, UK. June.

Nigel Cattlin / Chickweed (Stellaria media) leaves and small white flowers, Berkshire, UK. June.

Nick Upton / Common chickweed (Stellaria media) and Germander speedwell (Veronica chamaedrys) flowering in farmland, Wiltshire, UK. March.

Laurie Campbell / Greater stitchwort (Stellaria holostea) flowering, Scottish Borders, Scotland, UK. May.

Robert Thompson / Greater stitchwort (Stellaria holostea) stamen detail, Brackagh Moss National Nature Reserve, County Armagh, Northern Ireland. April.

Robert Thompson / Greater stitchwort (Stellaria holostea) flower close up, Brackagh Moss National Nature Reserve, County Armagh, Northern Ireland. April.

Robert Thompson / Greater stitchwort (Stellaria holostea) flowering, Brackagh Moss National Nature Reserve, County Armagh, Northern Ireland. April.

Nigel Cattlin / Chickweed (Stellaria media), a prostrate spreading weed, growing among Sugar beet (Beta vulgasris) crop seedlings on fen soil, Cambridgeshire, England, UK.

Linda Pitkin / Greater stitchwort (Stellaria holostea) in flower, Surrey, England. May.

Ernie Janes / Early purple orchid (Orchis mascula)and greater stitchwort (Stellaria holostea) Norfolk, England, UK, May.

Nick Upton / Greater stitchwort (Stellaria holostea) flowering among Bluebells (Hyacinthoides nonscripta) in woodland understorey, near Box, Wiltshire, UK, April.

Nigel Cattlin / Chickweed (Stellaria media) flowers and leaves of an annual agricultural and garden weed

Linda Pitkin / Common chickweed (Stellaria media) The Ledges, Esher Common SSSI, Surrey, England, May.

Linda Pitkin / Bog stitchwort (Stellaria alsine / uliginosa) Thundry Meadows, SWT nature reserve, Elstead, Surrey, England, May.

Olga Kamenskaya / Chickweed (Stellaria dahurica) Lake Baikal, Siberia, Russia. July.

Ross Hoddinott / Close up of Greater stitchwort (Stellaria holostea) flower in evening light, Broxwater, Cornwall, UK. April.

Andy Sands / Orange tip butterfly (Anthocharis cardamines) male on Greater stitchwort flower in English woodland, Hertfordshire, England, UK, April.

Will Watson / Chickweed (Stellaria media) flower magnified 10x, focus stacked, garden, Herefordshire, England, May.

Will Watson / Flower of Water Chickweed (Mysosotun aquaticum), kettle hole pond, Herefordshire, England, September.

Nigel Cattlin / Severe infestation of several broad-leaved weed species in a young wheat crop, Cambridgeshire, England, UK,

Nigel Cattlin / Various seedling broad-leaved weeds in a very young sugar beet crop on the Fens in Cambridgeshire, England, UK.

Nigel Cattlin / Common starwort or grass-leaved stitchwort (Stellaria graminea) flowering in a grass pasture meadow, Berkshire June