Ernie Janes / Common foxglove (Digitalis purpurea) flowers, UK

Rolf Nussbaumer / Texas Paintbrush (Castilleja indivisa) in field of Huisache Daisies (Amblyolepis setigera) Fennessey Ranch, Refugio, Coastal Bend, Texas Coast, USA

Rolf Nussbaumer / Close up of Texas Paintbrush (Castilleja indivisa) flowering, Fennessey Ranch, Refugio, Coastal Bend, Texas Coast, USA

Alan Watson / Alpine paintbrush (Castilleja rhexifolia) in an alpine meadow along the Rockwall trail, Kootenay National Park, British Columbia, Canada. (World Heritage Site)July 2009

Wild Wonders of Europe / Ziegler / Mullein (Verbascum sp) in flower, with landscape behind, Southern Peloponnese, Greece, May 2009

Wild Wonders of Europe / Maitland / Hoary mullein (Verbascum pulverulentum) leaf whorl, Stenje region, Lake Macro Prespa, Galicica National Park, Macedonia, June 2009

Wild Wonders of Europe / Bartocha / Great mullein (Verbascum thapsus) at night with startrails, Monti Sibillini National Park, Umbria, Italy, May 2009. WWE INDOOR EXHIBITION

Wild Wonders of Europe / Giesbers / Eurepean yellow rattle (Rhinanthus alectorolophus) flowering in alpine meadow, Liechtenstein, June 2009

Wild Wonders of Europe / Giesbers / European yellow rattle (Rhinanthus alectorolophus) flowering in alpine meadow, Liechtenstein, June 2009

Wild Wonders of Europe / Benvie / Spiked speedwell (Veronica spicata) in flower, Fliess, Naturpark Kaunergrat, Tirol, Austria, July 2008

Wild Wonders of Europe / Ruiz / Common foxglove (Digitalis purpurea) flower, Brtnicky Hradek, Ceske Svycarsko / Bohemian Switzerland National Park, Czech Republic, September 2008

Wild Wonders of Europe / Schandy / (Veronica sp) in flower, Mount Cheget, Caucasus, Russia, June 2008

Ingo Arndt / Common foxglove (Digitalis purpurea), white and purple cultivars, Europe

Ingo Arndt / Common foxglove (Digitalis purpurea), white and purple cultivars, Europe

Ingo Arndt / Common foxglove (Digitalis purpurea) flowers, Europe

Ingo Arndt / Common foxglove (Digitalis purpurea) flowers, Europe

MYN / Paul Harcourt Davies / Toothwort (Lathraea squamaria) in flower, a parasitc species on the roots of hazel and poplar, near Orvieto, Italy, April. Meetyourneighbours.net project

Paul Harcourt Davies / Toothwort (Lathraea squamaria) a parasitc species on the roots of hazel and poplar, near Orvieto, Italy. April

Paul Harcourt Davies / Purple Mullein (Verbascum phoeniceum) flower, Gargano, Puglia, Italy

Paul Harcourt Davies / Purple Mullein (Verbascum phoeniceum) flower, Gargano, Puglia, Italy

Paul Harcourt Davies / Purple Mullein (Verbascum phoeniceum) in flower, Gargano, Puglia, Italy

Paul Harcourt Davies / Purple Toadflax (Linara purpurea) flower, Mount Terminillo, Rieti, Lazio, Italy, July

Paul Harcourt Davies / Long-leaved mullein (Verbascum longifolium) flowers, Mount Terminillo, Rieti, Lazio, Italy, July

Paul Harcourt Davies / Long-leaved mullein (Verbascum longifolium) flowers, Mount Terminillo, Rieti, Lazio, Italy, July

Paul Harcourt Davies / Alpine toadflax (Linaria alpina) in flower, above Lago Ritorto, Madonna di Campiglio, on acid rocks of Adamello Range, Dolomites, Italy. July

Paul Harcourt Davies / Alpine toadflax (Linaria alpina) in flower above Pordoi pass, Dolomites, Italy, Italy, July

Paul Harcourt Davies / Alpine toadflax (Linaria alpina) flower close up, above Pordoi pass, Dolomites, Italy, July

Paul Harcourt Davies / Long-leaved Mullein (Verbascum longifolium) Sibillini Mts. Umbria. Italy, June

Paul Harcourt Davies / Elegant Lousewort (Pedicularis elegans) in flower, Appennines, Italy, June

Paul Harcourt Davies / Elegant Lousewort (Pedicularis elegans) in flower, Appennines, Italy, June

Paul Harcourt Davies / Apennine lousewort (Pedicularis elegans) in flower, Gran Sasso, Appennines, Abruzzo, Italy, June

Paul Harcourt Davies / Verticilllate lousewort (Pedicularis verticillata) Gran Sasso, Appennines, Abruzzo, Italy, June

Paul Harcourt Davies / Apennine lousewort (Pedicularis elegans) in flower, Gran Sasso, Appennines, Abruzzo, Italy, June

Paul Harcourt Davies / Alpine Toadflax (Linaria alpina) in flower, Campo Imperatore, Gran Sasso, Appennines, Abruzzo, Italy, May 2011

Paul Harcourt Davies / Alpine Toadflax (Linaria alpina) in flower, Campo Imperatore, Gran Sasso, Appennines, Abruzzo, Italy, May

Paul Harcourt Davies / Alpine Toadflax (Linaria alpina) in flower, Campo Imperatore, Gran Sasso, Appennines, Abruzzo, Italy, May

Paul Harcourt Davies / Mullein (Verbascum macrurum) near Chania, Crete, April

Paul Harcourt Davies / Mullein (Verbascum macrurum) flowers close-up, near Chania, Crete, April

Niall Benvie / Yellow Rattle (Rhinathus minor) flower against white background. Scotland, UK, July.

Adrian Davies / Three Birds Flying Toadflax (Linaria triornithophora) Picos de Europa, Spain, June

Adrian Davies / Fairy Foxglove (Erinus alpinus) growing in between rocks, Picos de Europa, Spain.

Nick Upton / Aaron's rod (Verbascum thapsus) flowering in profusion on a stable coastal sand dune among grases, Bracken and other plants, Gower Peninsula, Wales, UK, July.

Nick Upton / Aaron's rod (Verbascum thapsus) flowering in profusion on a stable coastal sand dune among grases, Bracken and other plants, Gower Peninsula, Wales, UK, July.

Nick Upton / Aaron's rod (Verbascum thapsus) on chalk grassland slope, with several Sloe bugs / Hairy shieldbugs (Dolycoris baccarum) feeding on the flowering spike, Wiltshire, UK, June.

Wild Wonders of Europe / Widstrand / Verbascum (Verbascum speciosum) flowering amongst (Echium sp) and (Leucanthemum sp), North Velebit National Park, Velebit Nature Park, Rewilding Europe area, Velebit mountains, Croatia

Wild Wonders of Europe / Widstrand / Verbascum (Verbascum speciosum) flowering amongst (Echium sp) and (Leucanthemum sp), North Velebit National Park, Velebit Nature Park, Rewilding Europe area, Velebit mountains, Croatia

Ben Hall / 2020VISION / Family walking along path, with Common foxglove (Digitalis purpurea) in foreground, Bramhall Park, Cheshire, England, UK, June.

Ben Hall / 2020VISION / Family walking along path, with Common foxglove (Digitalis purpurea) in foreground, Bramhall Park, Cheshire, England, UK, June.

Alex Hyde / Alpine Toadflax (Linaria alpina) growing in scree slope on mountainside in Aosta Valley, Monte Rosa Massif, Pennine Alps, Italy. July.

Alex Hyde / Alpine Toadflax (Linaria alpina) growing in scree slope on mountainside in Aosta Valley, Monte Rosa Massif, Pennine Alps, Italy. July.

Wild Wonders of Europe / Bartocha / Cow wheat (Melampyrum nemorosum)flower, Carpathian Mountains, Romania, August

Fabrice Cahez / Foxglove (Digitalis purpurea) flowers. Vosges, France, June.

Oriol Alamany / Giant Red Paintbrush (Castilleja miniata) flowering at Takakkaw Falls, Yoho National Park, Rocky Mountains, British Columbia, Canada

Philippe Clement / Greater Yellow rattle (Rhinanthus angustifolius / Rhinanthus serotinus) in flower, Pyrenees, France June

Ross Hoddinott / 2020VISION / Yellow rattle (Rhinanthus minor) flower backlit in early morning light, Denmark Farm, Lampeter, Wales, UK, June. 2020VISION Book Plate.

Colin Varndell / Foxglove (Digitalis purpurea) flowering. Dorset, UK, June.

Alex Hyde / Traditional flower-rich hay meadow including Yellow Rattle (Rhinanthus minor), Buttercup (Ranunculus acris), Red Clover (Trifolium pratense) and host of different grasses. Peak District National Park,...

Eric Baccega / Woolly lousewort (Pedicularis lanata) flowering on tundra, Ellesmere Island, Nunavut, Canada, June 2012.

Eric Baccega / Woolly lousewort (Pedicularis lanata) flowering on tundra, Ellesmere Island, Nunavut, Canada, June 2012.

Eric Baccega / Woolly lousewort (Pedicularis lanata) flowering on tundra, Ellesmere Island, Nunavut, Canada, June 2012.

Philippe Clement / Fairy foxglove / Jewel flower / Alpine balsam / Liver balsam (Erinus alpinus) in flower, native to Central and Southern Europe, National Botanic Garden of Belgium, May

Wild Wonders of Europe / Möllers / Ivy-leaved toadflax (Cymbalaria muralis) growing in the wall of the Mayor's House, Pont-du-Chateau, Auvergne, France, August 2010

Wild Wonders of Europe / Möllers / Orange mullein (Verbascum phlomoides) flowering, Pont-du-Chateau, Auvergne, France, August 2010

Michel Poinsignon / Foxglove (Digitalis purpurea) close up in flower, Vosges Mountains, Lorraine, France July.

Michel Poinsignon / Foxglove (Digitalis purpurea) in flower with pine trees in background, Vosges Mountains, Lorraine, France July.

Michel Poinsignon / Common toadflax (Linaria vulgaris) Hettange, Lorraine, France, August.

Michel Poinsignon / Common toadflax (Linaria vulgaris) with fly, Hettange, Lorraine, France, August.

Michel Poinsignon / Common toadflax (Linaria vulgaris) with fly, Hettange, Lorraine, France, August.

Nick Upton / Mullein (Verbascum sp) plants with old flower spikes on bare, rocky summit of Mount Ambelos with the Aegean Sea in the background, Samos, Greece, August 2011.

Nick Upton / Mullein (Verbascum sp) plants with old flower spikes on bare, rocky summit of Mount Ambelos with Mount Kerki in the background, Samos, Greece, August 2011.

Nick Upton / Mullein (Verbascum sp) plants with old flower spikes on bare, rocky summit of Mount Ambelos with the Aegean Sea in the background, Samos, Greece, August 2011.

Nick Turner / Common foxgloves (Digitalis purpurea) UK, June 2009.

MYN / David Hunter / Indain Paintbrush (Castilleja coccinea) flowers, Sierra Nevada Mountains, California, USA, July. meetyourneighbours.net project

MYN / David Hunter / Yellow-White Monkey flower (Mimulus bicolor) flowers, Sierra Nevada Mountains, California, USA, July. meetyourneighbours.net project

MYN / David Hunter / Common Large Monkey flower (Mimulus guttatus) in flower, Sierra Nevada Mountains, California, USA, July. meetyourneighbours.net project

Niall Benvie / 2020VISION / Common foxglove (Digitalis purpurea) in flower, Scotland, UK, June meetyourneighbours.net project

Nick Upton / Common Toadflax (Linaria vulgaris) flowering in grassland meadow. Wiltshire, UK, June.

David Woodfall / Foxglove (Digitalis purpurea) flower close-up, after rain, UK

MYN / Marko Masterl / Wood cow-wheat (Melampyrum nemorosum) in flower, Slovenia, Europe, July. meetyourneighbours.net project

Oriol Alamany / Sand Lady's slipper / Zapatito de la Virgin (Calceolaria uniflora), Torres del Paine National Park, Patagonia, Chile

Ernie Janes / Field cow wheat (Melampyrum arvense) flowering, Chilterns, Buckinghamshire, UK, June

Ole Jorgen Liodden / Common Toadflax (Linaria vulgaris) in rain. Norway, July.

Fabrice Cahez / Flower meadow with Meadow clary (Salvia pratensis), Yellow rattle (Rhinantus minor) and Sainfoin (Onobrychis viciifolia) Vosges, France, May

Fabrice Cahez / Flower meadow of Meadow clary (Salvia pratensis), Yellow rattle (Rhinantus minor) and Sainfoin (Onobrychis viciifolia) Vosges, France, May

Andy Sands / Field Cow Wheat (Melampyrum arvense) growing abundantly among poppies - Field Cow Wheat is a rare arable weed. Bedfordshire, England, June.

Andy Sands / Field Cow Wheat (Melampyrum arvense) growing at edge of cornfield. This species is a rare, arable weed. Bedfordshire, England, UK, June.

Philippe Clement / Greater Yellow-rattle (Rhinanthus angustifolius / Rhinanthus serotinus) in flower. Belgium, May.

Philippe Clement / Greater Yellow-rattle (Rhinanthus angustifolius / Rhinanthus serotinus) in flower. Belgium, May.

Bernard Castelein / Lousewort (Pedicularis sylvatica) flowering amongst moss, Klein Schietveld, Brasschaat, Belgium, April

Inaki Relanzon / Fairy Foxglove (Erinus alpinus) against a waterfall. Ordesa National Park, Pyrenees, Spain, June.

Ross Hoddinott / 2020VISION / Visitor, Jazz Dyson, photographing Foxgloves {Digitalis purpurea} growing at Denmark Farm Conservation Centre, Lampeter, Wales, UK. June 2011. Model released

Ross Hoddinott / 2020VISION / Foxglove {Digitalis purpurea} flowers in summer, Denmark Farm Conservation Centre, Lampeter, Wales, UK. June

Ross Hoddinott / 2020VISION / Visitor, Jazz Dyson, looking at Foxgloves {Digitalis purpurea} growing at Denmark Farm Conservation Centre, Lampeter, Wales, UK. June 2011. Model released

Ross Hoddinott / 2020VISION / Foxglove {Digitalis purpurea} flowers in summer, Denmark Farm Conservation Centre, Lampeter, Wales, UK. June

Ernie Janes / Ivy-leaved toadflax (Cymbalaria muralis) UK

Jeff Wilson / Woolly lousewort (Pedicularis lanata) flowering on tundra, Ellesmere Island, Nunavut, Canada, June 2008. Taken on location for BBC series, Frozen Planet, Summer