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Banksia marginata [Silver Banksia]


DaveO

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Oldfield, D. 2018. Banksia marginata Cav. Silver Banksia (Proteaceae) Flowers photographed in visible and ultraviolet light. http://www.ultravioletphotography.com/content/index.php/topic/2723-banksia-marginata-silver-banksia/

 

 

Synonyms

Banksia gunnii Meisn.

Banksia depressa R.Br.

Banksia patula R.Br.

 

Maldon, Victoria, Australia

7 April 2018

Australian Native Plant as Garden Specimen

 

Comment

Banksia marginata was named by Spanish botanist Antonio Cavanilles from reference to the recurved margins of the leaves. The type-specimen was gathered by French-born Spaniard Luis Née In April 1793 between Port Jackson and Parramatta, New South Wales.

 

The first set of images was of a fresh specimen taken from a tree about 5 m tall.

 

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.

post-28-0-02264400-1525674604.jpg

Image Reference: DO65113

 

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.

post-28-0-32740600-1525674621.jpg

Image Reference: DO65120

 

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, 10.0 s @ f/16 ISO 1600.

post-28-0-16347100-1525674641.jpg

Image Reference: DO65122

 

The next set were of the same specimen 20 days later, after it had been stored with the stem in water.

 

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.

post-28-0-58847800-1525674681.jpg

Image Reference: DO65162

 

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.

post-28-0-78779700-1525674704.jpg

Image Reference: DO65164

 

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, 10.0 s @ f/16 ISO 1600.

post-28-0-03249900-1525674725.jpg

Image Reference: DO65166

 

The final set were of a new flower which had been attacked by cockatoos.

 

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.

post-28-0-54151600-1525674769.jpg

Image Reference: DO65153

 

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.

post-28-0-32723200-1525674793.jpg

Image Reference: DO65155

 

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, 10.0 s @ f/16 ISO 1600.

post-28-0-38047700-1525674808.jpg

Image Reference: DO65156

 

Reference:

Collins, K., Collins, K. and George, A., Banksias, Bloomings Books, 2008, p. 255.

 

Published 7 May 2018

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Andy Perrin
It looks like one of those things you use for dusting high shelves. What a strange flower.
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Andrea B.

Yes, here and there, I've seen some green fluorescence. Although perhaps not as large an amount as here.

 

How have you handled the white balance in the fluorescence photos? Are the colors shown here like what you saw while shooting?

 

Before anyone reminds me, yes, I know what we see in the dark can depend on our scotopic vision. But we still can get a good idea of what fluorescent color we are seeing while shooting.

 

This flower looks like a kind of pine cone at the end. I don't understand the structure of this as a flower. Is that a bud at the end of each stalk? Or are those anthers or stigmas?

 

Dave, "attacked by cockatoos" is not a phrase which has ever occured in my botanical photography! :D I'm showing my geographical naiveté here, but it seemed so very exotic that it made me laugh.

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Andrea,

Here's a link to the structure of banksia

https://www.anbg.gov.au/banksia/index.html

 

I will try, but doubt if I will find, any studies on the natural products in banksia to get a clue on the molecules involved and so the way they might respond in fluorescence. Any body need a PhD topic?

Dave

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