Dave Kennard's photos with the Nectar guide

Herb Robert (Geranium robertianum) [Vis UV IR]

Herb Robert (Geranium robertianum) [Vis UV IR]
Spectral comparison of Herb Robert (Geranium robertianum) using reflected visible light (top), ultraviolet light (middle), and infrared light (bottom). In ultraviolet light the flower's UV nectar guides) are visible, being darker near the centre of the fl…
Added on June  5, 2013

Cornus alba 'Elegantissima' flower Vis-UV-IR

Cornus alba 'Elegantissima' flower Vis-UV-IR
Comparison of a Siberian Red barked Dogwood (Cornus alba 'Elegantissima') flower in visible light (top), ultraviolet light (centre), and infrared light (bottom).

The plant has variegated leaves, but the variegation is not easily apparent in ultraviolet a…
Added on June 11, 2013

Iris sibirica 'Tropic-night' flower Vis-UV-IR

Iris sibirica 'Tropic-night' flower Vis-UV-IR
Comparison of a Iris sibirica 'Tropic-night' flower in visible light (left), ultraviolet light (centre), and infrared light (right).

In ultraviolet light the flower's throat has clear dark markings along the centre, acting as a Nectar guide to bees and o…
Added on June 11, 2013

Orange Welsh Poppy (Meconopsis cambrica var. aurantiaca) flower Vis-UV-IR

Orange Welsh Poppy (Meconopsis cambrica var. aurantiaca) flower Vis-UV-IR
Comparison of a Orange Welsh Poppy (Meconopsis cambrica var. aurantiaca) flower in visible light (left), ultraviolet light (centre), and infrared light (right).

In ultraviolet the anthers and stigma appear much darker than they do in visible light. There…
Added on June 11, 2013

Orange Hawkweed (Pilosella aurantiaca) flower Vis-UV-IR

Orange Hawkweed (Pilosella aurantiaca) flower Vis-UV-IR
Comparison of a Orange Hawkweed (Pilosella aurantiaca) flower in visible light (top), ultraviolet light (centre), and infrared light (bottom).

The flower appears slightly different in ultraviolet compared to visible light. In UV the flower gets darker to…
Added on June 11, 2013

Yellow Day lily (Hemerocallis lilioasphodelus) Vis-UV-IR

Yellow Day lily (Hemerocallis lilioasphodelus) Vis-UV-IR
Comparison of a Yellow Day lily (Hemerocallis lilioasphodelus) flower in visible light (left), ultraviolet light (centre), and infrared light (right).

In ultraviolet light the flower's throat has clear dark markings, acting as a Nectar guide to bees and…
Added on June 11, 2013

Aquilegia caerulea 'Crimson Star' [Vis UV IR]

Aquilegia caerulea 'Crimson Star' [Vis UV IR]
Photos comparing the appearance of a Aquilegia caerulea 'Crimson Star' flower in visible light (top), ultraviolet light (middle), and infrared light (bottom).

The Crimson Star cultivar is a star shaped flower with deep red spurs, white corollas, and a tu…
Added on June 13, 2013

Garden Strawberry (Fragaria × ananassa) [Vis UV IR]

Garden Strawberry (Fragaria × ananassa) [Vis UV IR]
Comparison of a Garden Strawberry (Fragaria × ananassa) flower under visible light (top), ultraviolet light (middle), and infrared light (bottom).

In visible light the flower has white petals with a yellow centre.

In ultraviolet light the flower has qui…
Added on June 13, 2013

Glechoma hederacea (Ground Ivy) [Vis UV IR]

Glechoma hederacea (Ground Ivy) [Vis UV IR]
Comparison of a Ground Ivy (Glechoma hederacea) flower in visible light (top), ultraviolet light (middle), and infrared light (bottom).

In visible light the flower appears violet with a darker purple colour around the throat.

In ultraviolet light the fl…
Added on June 13, 2013

Crocosmia sp. (Montbretia) flowers Vis UV IR comparison

Crocosmia sp. (Montbretia) flowers Vis UV IR comparison
A comparison of how Montbretia flowers appear in visible light (top), ultraviolet light (middle), and infrared light (bottom).

In visible light the flowers appear red with a yellow throat.

In ultraviolet the throat of the flower is much darker. These UV…
Added on August 24, 2013

Jacobaea maritima (Silver Ragwort) flowers Vis UV IR

Jacobaea maritima (Silver Ragwort) flowers Vis UV IR
Comparison of Jacobaea maritima (Silver Ragwort) flowers photographed with visible light (top), ultraviolet light (middle), and infrared light (bottom).

In visible light the flowers appear bright yellow, with the centres being slightly darker than the pe…
Added on August 24, 2013

Mentha aquatica (Water mint) flower Vis UV IR comparison

Mentha aquatica (Water mint) flower Vis UV IR comparison
Mentha aquatica (Water mint) photographed in visible light (left), ultraviolet light (centre), and infrared (right).

In visible light the plant has pale pink flowers with darkish green leaves.

In ultraviolet light the flowers appear much darker.

In inf…
Added on August 24, 2013

Achillea ptarmica 'The pearl' UV Vis IR comparison

Achillea ptarmica 'The pearl' UV Vis IR comparison
Comparison of Achillea ptarmica 'The pearl' flowers photographed in visible light (top), ultraviolet (middle), and infrared (bottom).

In visible light the flowers appear white with a pale yellow centre.

In ultraviolet light the flowers appear darker. Th…
Added on August 31, 2013

Buddleja davidii (Butterfly-bush) Vis UV IR comparison

Buddleja davidii (Butterfly-bush) Vis UV IR comparison
Buddleja davidii (Butterfly-bush) flowers photographed in visible light (top), ultraviolet (middle), and infrared (bottom).

In visible light the flowers are purple with an orange centre. There is a slightly lighter area around the edge of the orange cent…
Added on August 31, 2013

Gladiolus × hortulanus 'Priscilla' Vis UV IR comparison

Gladiolus × hortulanus 'Priscilla' Vis UV IR comparison
Gladiolus × hortulanus 'Priscilla' flower photographed in visible light (top), ultraviolet (middle), and infrared (bottom).

In visible light the flower is pale pink with a yellow centre and deeper pink edges.

In ultraviolet light the area near the edge…
Added on August 31, 2013

Oxalis tetraphylla (Four-leaved Pink Sorrel) Vis UV IR comparison

Oxalis tetraphylla (Four-leaved Pink Sorrel) Vis UV IR comparison
Oxalis tetraphylla (Four-leaved Pink Sorrel) photographed in visible light (top), ultraviolet light (middle), and infrared light (bottom).

In visible light the plant has pink flowers with a green centre. The flowers are quite strongly veined, with the ve…
Added on August 31, 2013