Nectar guides are patterns seen in some flowers that guide pollinators to the nectar and pollen. A flower, also known as a bloom or Blossom, is the reproductive structure found in Flowering plants (plants of the division Magnoliophyta, also Nectar is a Sugar -rich liquid produced by plants It is produced either by the Flowers in which it attracts pollinating animals or by extrafloral Pollen is a fine to coarse powder consisting of microgametophytes ( pollen grains) which produce the male Gametes (sperm cells of

These patterns are sometimes visible to humans; for instance, the Dalmatian toadflax (Linaria genistifolia) has yellow flowers with orange nectar guides. Linaria is a genus of about 100 species of Herbaceous annuals and perennials that was traditionally placed in the Foxglove family ^[1] However, in some plants, such as sunflowers, they are visible only under ultraviolet light. The sunflower ( Helianthus annuus) is an Annual plant in the family Asteraceae and native to the Americas, with a large flowering Ultraviolet ( UV) light is Electromagnetic radiation with a Wavelength shorter than that of Visible light, but longer than X-rays Light, or visible light, is Electromagnetic radiation of a Wavelength that is visible to the Human eye (about 400–700 Under ultraviolet, the flowers have a darker center, where the nectaries are located, and often specific patterns upon the petals as well. This is believed to make the flowers more attractive to pollinators such as honey bees and other insects that can see ultraviolet. A pollinator is the biotic agent ( vector) that moves Pollen from the male Anthers of a Flower to the female stigma of a flower to accomplish This article refers collectively to all true honey bees for the "common" domesticated honey bee see European honey bee Honey bees Insects ( Class Insecta) are a major group of Arthropods and the most diverse group of Animals on the Earth with over a million described This page on butterflies shows an animated comparison of black-eyed Susan (Rudbeckia hirta) flowers in visible and UV light. "Brown Betty" redirects here For the pastry dish see Cobbler (food.

Images of a Mimulus flower in visible light (left) and ultraviolet light (right) showing a dark nectar guide, visible to bees but not to humans

The ultraviolet color, invisible to humans, has been referred to as bee violet, and mixtures of ultraviolet with shorter (yellow) wavelengths are called bee purple by analogy with purple in human vision. Yellow is the Color evoked by light that stimulates both the L and M (long and medium wavelength Cone cells of the Retina about equally Purple is a general term for the range of shades of Color occurring between Red and Blue. . ^[2]

References

External links

• Dalmatian Toadflax from the Southwest Exotic Plant Information Clearinghouse
• What do butterflies see? (speculation)