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Allocasuarina verticillata [Drooping Sheoak]

Fluorescence
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#1 DaveO

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Posted 27 August 2015 - 06:03

Oldfield, D. 2015. Allocasuarina verticillata (Lam.) L A S Johnson (Casuarinaceae) Drooping Sheoak. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...rooping-sheoak/

Synonyms
Casuarina verticillata Lam.
Casuarina stricta Aiton
Casuarina quadrivalvis Labill.
Casuarina macrocarpa A. Cunn ex Miq.
Casuarina gunnii Hook.f. ex Miq.

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

Comment
Allocasuarina verticillata is a small spreading tree with drooping branches which grows widely in south eastern Australia. It bears male and female flowers on separate trees and is wind pollinated. Male trees have yellow brown flower-spikes and female trees have red globular flowers. A number of trees grown from seed about four years ago were examined and male flowers were found on two trees, no female flowers have yet been found. The photographs were taken with the flowers hanging down, as on the trees. The anthers appear to have all shed their pollen (dehisced). The flower spikes were about 2 mm diameter.

Male flowers

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: Allocasuarina_verticillata_Vis.jpg
Image Reference: DO60787

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: Allocasuarina_verticillata_UV.jpg
Image Reference: DO60794

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: Allocasuarina_verticillata_UVIVFL.jpg
Image Reference: DO60796

Reference:
Moncur, M W, Boland, D J, and Harbard, J L, Aspects of the Floral Biology of Allocasuarina verticillata , Aust. J. Bot., 1997, 45 857–869.

Published 27 August 2015

#2 Andrea B.

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Posted 06 November 2015 - 05:04

This is the coolest thing when fluorescing! I've never seen anything quite like it.
Andrea G. Blum
Often found hanging out with flowers & bees.

#3 DaveO

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Posted 07 November 2015 - 00:34

I notice that a few of our native flowers have bright blue hairs in UVIVFL. I'm still looking for a tree with female flowers, it's probably too late this year now.

Dave