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Dodonaea viscosa subsp. cuneata [Wedge-leaf Hop-bush]

Fluorescence
5 replies to this topic

#1 DaveO

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Posted 21 August 2015 - 05:06

Oldfield, D. 2015. Dodonaea viscosa subsp. cuneata (Sm.) J G West (Sapindaceae) Wedge-leaf Hop-bush. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...-leaf-hop-bush/

Synonyms
Dodonaea cuneata Sm.
Dodonaea cuneata var. coriacea Benth.

Maldon, Victoria, Australia
4 August 2015
Australian Native Wildflower as Garden Specimen

Comment
Dodonaea viscosa subsp. cuneata is known as ‘Hop-bush’ as it was used to make beer by early European Australian settlers. The plants are dioecious, i.e. the flowers are male or female and usually occur on separate plants. The pollen is wind dispersed.

Female flowers, about 4 mm long

Visible Light: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Metz 15 MS-1 flash, 1/200 s @ f/16 ISO 200, Baader UV/IR Cut Filter.
Attached Image: Dodonaea_viscosa_fm_Vis.jpg
Image Reference: DO60763

Ultraviolet Light: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Nissin Di866 Mark II flash, 1/200s @ f/16 ISO 200, Baader UV-Pass Filter.
Attached Image: Dodonaea_viscosa_fm_UV.jpg
Image Reference: DO60766

Ultraviolet Induced Visible Fluorescence: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens with Baader UV/IR Cut Filter, Nichia NCSU033A UV-LED with Baader UV-Pass Filter, 30.0 s @ f/16 ISO 400.
Attached Image: Dodonaea_viscosa_fm_UVIVFL.jpg
Image Reference: DO60771

Male flowers, about 3 mm diameter

Visible Light: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Metz 15 MS-1 flash, 1/200 s @ f/16 ISO 200, Baader UV/IR Cut Filter.
Attached Image: Dodonaea_viscosa_ml_Vis.jpg
Image Reference: DO60774

Ultraviolet Light: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Nissin Di866 Mark II flash, 1/200s @ f/16 ISO 200, Baader UV-Pass Filter.
Attached Image: Dodonaea_viscosa_ml_UV.jpg
Image Reference: DO60779

Ultraviolet Induced Visible Fluorescence: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens with Baader UV/IR Cut Filter, Nichia NCSU033A UV-LED with Baader UV-Pass Filter, 30.0 s @ f/16 ISO 400.
Attached Image: Dodonaea_viscosa_ml_UVIVFL.jpg
Image Reference: DO60782

References:
Elliott, W.R. and Jones, D.L. Encyclopaedia of Australian Plants suitable for cultivation, Volume 3, 1984, Lothian, p. 326.

Published 21 August 2015

#2 colinbm

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Posted 21 August 2015 - 12:02

You are still creating magic Dave :lol:
Col

#3 DaveO

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Posted 22 August 2015 - 01:26

Thanks Col,

I didn't know all about these wonders under our noses before I started taking these images. This particular plant doesn't need or use insects or birds for pollination and the very decorative red seed capsules (yet to be photographed later in the year) will form whether fertilisation occurs or not. So, is the black UV signature simply to protect the plant from UV? The red colouration in the visible images of both the female and male flowers may perhaps be due to anthocyanin type pigments as in autumn leaves and the UVIVFL may also simply indicate fluorescence of those compounds. So, perhaps UV signatures just happen and we should stop trying to explain them as ways to increase pollinator visitation.

Cheers,

Dave

#4 JCDowdy

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Posted 22 August 2015 - 23:01

Are any craft brewers using this as a Hop substitute?

#5 DaveO

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Posted 23 August 2015 - 02:47

There is a lot of interest in craft beers but I think they use "real" hops http://www.abc.net.a...revival/5331234

Cheers,

Dave

#6 DaveO

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Posted 10 November 2015 - 03:26

Another set taken 28 October 2015 of fruit capsules on the female bush

Visible Light: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Metz 15 MS-1 flash, 1/200 s @ f/16 ISO 200, Baader UV/IR Cut Filter.
Attached Image: Dodonaea_viscosa_fm_fruit_Vis.jpg
Image Reference: DO62143

Ultraviolet Light: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Nissin Di866 Mark II flash, 1/200s @ f/16 ISO 200, Baader UV-Pass Filter.
Attached Image: Dodonaea_viscosa_fm_fruit_UV.jpg
Image Reference: DO62145

Ultraviolet Induced Visible Fluorescence: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens with Baader UV/IR Cut Filter, Nichia NCSU033A UV-LED with Baader UV-Pass Filter, 30.0 s @ f/16 ISO 400.
Attached Image: Dodonaea_viscosa_fm_fruit_UVIVFL.jpg
Image Reference: DO62147