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Linum marginale [Native Flax]

Fluorescence
3 replies to this topic

#1 DaveO

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Posted 23 January 2016 - 23:37

Oldfield, D. 2016. Linum marginale A. Cunn. (Linaceae). Native Flax. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...le-native-flax/

Synonym
Linum marginale var. australe Wawra

Maldon, Victoria, Australia
24 June 2015
Australian Native Wildflower as Garden Specimen

Comment
Linum marginale is widely distributed in all Australian states. Australian Aborigines used the fibrous bark of the stems for making cord and nets and ate the seeds.

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: Linum_marginale_Vis.jpg
Image Reference: DO62088

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: Linum_marginale_UV.jpg
Image Reference: DO62092

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.
Attached Image: Linum_marginale_UVIVFL.jpg
Image Reference: DO62094

References:
Elliott, W.R. and Jones, D.L. Encyclopaedia of Australian Plants suitable for cultivation, Lothian 1993, Volume 6, p. 195.

Published 24 January 2016

Edited by DaveO, 24 January 2016 - 00:16.


#2 Andrea B.

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Posted 24 January 2016 - 21:31

Flax flowers are one of my favorites. So nice to see them in UV and UVIVF.

It is interesting to see that this particular L. marginale is somewhat more UV absorbing than our other 3 examples in Linum.
Andrea G. Blum
Often found hanging out with flowers & bees.

#3 DaveO

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Posted 25 January 2016 - 00:08

What the photos don't show is the fact that the flower is light sensitive, by the time I had taken the first two (with flash) then set up the UVIVFL in the dark and even with the UV-LED shining on it, the flower had decided it was bed time and was rapidly closing! The red fluorescence is presumably due to chlorophyll which is much duller than the blue of the pollen on the stamens. I gather from the book that we only have one or two endemic flax species in Australia.

#4 Andrea B.

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Posted 25 January 2016 - 00:28

I've had that flower close-up happen. In between Visible and UV shots, the flower becomes half-closed and starts to droop. Even indoors, some flowers seem to know when sunset is happening. :D

Or sometimes after a careful focus for a close-up shot, the flower begins to turn with the light and by the time you place the filter and shoot -- blur !!

Ah, the trials and tribulations of the documentary botanical photographer.......
Andrea G. Blum
Often found hanging out with flowers & bees.