PIX4670336: Aurora boreale - Finland - 10/2003 - Aurora borealis in Finland 10/2003 - Aurora boreale observed in Lapland, Kittilae (Finland), October 2003. Aurora borealis seen in Lapland, in Kittilae, Aakenus fell, (Finland). October 2003 / Bridgeman Images

FLO4670349: Mr. Bowie's oxalis, Oxalis bowiei, scalloped wood-sorrel, Oxalis crenata, many-flowered oxalis, Oxalis floribunda, and variable oxalis, Oxalis variabilis. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

PIX4670360: Aurora boreale - Finland - 10/2008 - Aurora borealis in Finland 10/2008 - Aurora boreale observed in Lapland, Kittilae, Finland, October 2008. Aurora borealis seen in Lapland, Kittilae (Finland). October 2008 / Bridgeman Images

FLO4670370: Three-flowered rafnia, Rafnia triflora, Baptisia australis, and white baptisia, Baptisia alba. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

FLO4670373: Cultivated double varieties of poppy anemone, Anemone coronaria. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

FLO4670413: Thick-leaved saxifrage, Saxifragus crassifolia, Nepaul saxifrage, Saxifragus ligulata, Saxifragus appositifolia and Saxifragus stellaris. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

PIX4670419: Aurora boreale - Finland - 11/1998 - Aurora borealis in Finland 11/1998 - Aurora boreale observed in Lapland, Kittilae, Finland, November 2008. Aurora borealis seen in Lapland, Kittilae (Finland). November 2008 / Bridgeman Images

PIX4670431: Aurora boreale - Finland - 11/1998 - Aurora borealis in Finland 11/1998 - Aurora boreale observed in Lapland, Kittilae, Finland, November 2008. Aurora borealis seen in Lapland, Kittilae (Finland). November 2008 / Bridgeman Images

FLO4670468: Pink-flowered milfoil, Achillea milfolium, golden yarrow, Achillea tomentosa, Clavena's silvery-leaved milfoil, Achillea clavenae, and tufted marshallia, Marshallia caespitosa. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

FLO4670470: Golden coreopsis, Coreopsis aurea, large-flowered coreopsis, C. grandiflora, lanceolate-leaved coreopsis, C. lanceolata, six-leaved coreopsis, C. senifolia, whorl-leaved coreopsis, C. verticillata, and smooth-leaved heliopsis, Heliopsis laevis. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

FLO4670481: Two-coloured gaillardia, Gaillardia bicolor, bristly gaillardia, Gaillardia aristata, large marsh ox-eye, Pyrethrum uliginosum, scarlet chrysanthemum, Pyrethrum carneum, and pellitory of Spain, Anthemis pyrethrum. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

FLO4670501: Mountain centaury, Centaurea montana, Swiss centaury, Centaurea rhapontica, cream-coloured centaury, Centaurea ochroleuca, and balsam-scented centaury, Centaurea balsamita. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

FLO4670520: Chrysanthemum indicum varieties: The Early Crimson, the Quilled Orange and the Quilled White. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

FLO4670525: Three-coloured arctotis, Arctotis tricolor, spotted arctotis, Arctotis maculata, showy arctotis, Arctotis speciosa, and narrow-leaved grindelia, Grindelia angustifolia. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

FLO4670583: Intermediate adenophora, Adenophora intermedia, toothed adenophora, A. denticulata, crowned adenophora, A. coronata, sweet-scented adenophora, A. suaveolens, large-flowered platycodon, Platycodon grandiflora, slender wahlenbergia gracilis, and pendulous symphis Symphiandra pendula. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

FLO4670633: Tuberous-rooted swallowwort, Asclepias tuberosa, water silk-weed, A. incarnata, and decumbent swallowwort, A. decumbens. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

PIX4670642: Aurora boreale in Iceland - Jokulsarlon - Northern light above Lake Jokulsarlon in Iceland - Aurora boreale on the glacial lake of Jokulsarlon, located south of the Vatnajokull glacier in Iceland. April 2016 / Bridgeman Images

FLO4670657: Mr. Coldry's phlox, Phlox coldryana, sweet-scented phlox, Phlox odorata, blue Canadian phlox, Phlox canadensis, and Van Houtte's phlox. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

FLO4670659: Mimulus maclayana, bright-scarlet mimulus, M. cardinalis, Mr. Smith's mimulus, M. smithii, yellow-flowered mimulus, M. luteus, and rose-coloured mimulus, M. roseus. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

FLO4670664: Creeping phlox, Phlox stolonifera, procumbent phlox, Phlox procumbens, bristle-leaved phlox, Phlox setacea, awl-leaved phlox, Phlox subulata, and snow-white phlox, Phlox nivalis. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

FLO4670668: American convolvulus, Convolvulus sepium americanus, kidney-leaved convolvulus, C. reniformis, bryony-leaved convolvulus, C. bryoniaefolius, potato vine, Ipomaea pandurata, and sagitate-leaved ipomaea, Ipomaea sagittifolia. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849. / Bridgeman Images

FLO4671033: Death's Head hawkmoth, Acherontia atropos, and oak hawkmoth, Marumba quercus. Handcoloured steel engraving by the Pauquet brothers after an illustration by Alexis Nicolas Noel from Hippolyte Lucas' Natural History of European Butterflies, Histoire Naturelle des Lepidopteres d'Europe, 1864. / Bridgeman Images

PIX4671043: Halo around the Sun - Sun Halo - Halos are due to the light of the Sun reflected by high-altitude clouds, cirrostratus, composed of ice crystals. They bend the light and cause a perfect circle around the Sun. February 2010. Halos are caused by sunlight being refracted by cirro - stratus clouds. These are thin clouds, very high in the atmosphere, and are composed of ice crystals. They bend light at a 22 degree angle, which creates a halo around the sun that is 44 degrees in diameter. February 2010 / Bridgeman Images

FLO4671048: Blind ringlet, Erebia pharte, almond-eyed ringlet, Erebia alberganus, Piedmont ringlet, Erebia meolans, and sooty ringlet, Erebia pluto. Handcoloured steel engraving by the Pauquet brothers after an illustration by Alexis Nicolas Noel from Hippolyte Lucas' Natural History of European Butterflies, Histoire Naturelle des Lepidopteres d'Europe, 1864. / Bridgeman Images

PIX4671060: Halo around the Sun - Sun Halo - Halos are due to the light of the Sun reflected by high-altitude clouds, cirrostratus, composed of ice crystals. They bend the light and cause a perfect circle around the Sun. Halos are caused by sunlight being refracted by cirro - stratus clouds. These are thin clouds, very high in the atmosphere, and are composed of ice crystals. They bend light at a 22 degree angle, which creates a halo around the sun that is 44 degrees in diameter / Bridgeman Images

FLO4671098: Lime hawkmoth, Mimas tiliae, eyed hawkmoth, Smerinthus ocellatus, and poplar hawkmoth, Laothoe populi. Handcoloured steel engraving by the Pauquet brothers after an illustration by Alexis Nicolas Noel from Hippolyte Lucas' Natural History of European Butterflies, Histoire Naturelle des Lepidopteres d'Europe, 1864. / Bridgeman Images

PIX4671130: Rainbow - Rainbow - Rainbow - Rainbow - Rainbow - fragmented sky appearing the Sun pierces through the clouds. 11 July 2008 Rainbow. July 11, 2008 / Bridgeman Images

FLO4671139: Vriesia brachystachys, description of the plant with ornamental leafy and with epi inflorescence in gold and purple colors. / Bridgeman Images

FLO4671146: Butterfly collector's tools from the 18th century: aerial net on a cane 1, scissors with racquets 2, small preservative brush 6, and soft brush to remove dust 9. Steel engraving by the Pauquet brothers from Hippolyte Lucas' Natural History of European Butterflies. / Bridgeman Images

PIX4671149: Rainbow at sunrise - Rainbow at sunrise - Arc - en - ciel observes 17 December 2005. At sunrise, the glowing light of the Sun caused an almost complete absence of blue and green colors in the rainbow. December 17, 2005. Rainbow seen at sunrise. Blue and green colors are almost invisible, because of this bright reddish sunshine / Bridgeman Images

FLO4671160: Variete of Aucuba Luteocarpa, with pale gold-coloured berry cluster. / Bridgeman Images

PIX4671168: Rainbow - Rainbow - Rainbow - Arc - en - ciel tres colorore. 2 December 2008 Rainbow. December 2nd, 2008 / Bridgeman Images

FLO4671181: Variete of Azalee marvel, with small semi-double flowers of type Amcena, pale purple colour. Lithograph by Worthington G.Smith (1835-1917), published in Floral Magazine, 1872, edited by Henry Honywood Dombrain (1818-1905). / Bridgeman Images

FLO4671194: Amarante Celosia Huttoni or crete de rooster, with purple and dark green foliage. Lithograph by Worthington G.Smith (1835-1917), published in Floral Magazine, 1872, edited by Henry Honywood Dombrain (1818-1905). / Bridgeman Images

FLO4671237: Hybrid Amaryllis, Olga variete with white flower crimson stripes. / Bridgeman Images

PIX4671241: Rainbow Rainbow Double Rainbow Double Rainbow / Bridgeman Images