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Spartium junceum [Spanish Broom]

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#1 Andrea B.

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Posted 28 May 2021 - 20:23

Blum, A.G. (2021) Spartium junceum L. (Fabaceae) Spanish Broom. Flowers photographed in ultraviolet, visible and infrared light. https://www.ultravio...-spanish-broom/

La Secuela, Santa Fe, New Mexico, USA
25 May 2021
Escapee in SW US

Synonyms:
None

Other Common Names:
  • Rush Broom
  • Weaver's Broom
  • Retama
Comment:
This Mediterranean native, Spanish Broom, is grown as an ornamental in South America and elsewhere. It can become invasive as an escapee. I don't know if the Spanish Broom on my land was purposefully planted or sprang up wild.
Spanish Broom has one of those interesting pea-like flowers which renders as a combination of both false-blue and false-yellow under UV white balance. The central keel is a dark, vivid false-blue while the outer wings are UV-black. The upright banner is mostly false-yellow on the front with dark blue veining. On the banner back, both false-blue and false-yellow are present above a UV-dark spot at the base.

References:
1. SEINet Arizona-New Mexico Chapter (acc 28 May 2021) Spartium junceum.
This is a southwestern biodiversity organization making use of the Symbiota portal software.
2. Zouhar, Kris. 2005. Spartium junceum. (acc 28 May 2021) In: Fire Effects Information System, U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory Link:

Equipment [Nikon D610-broadband + Nikon 105mm f/4.5 UV-Nikkor]

Visible Light [f/11 for 1/640" @ ISO-100 in Sunlight with Baader UVIR-Block Filter]
Attached Image: spanishBroom_vis_sun_20210525_22998laSecuelapn.jpg


Ultraviolet Light [f/8 for 1/13" @ ISO-1270 in Sunlight with BaaderU UV-Pass Filter]
When the view is chosen in Visible light, it does not always work out well in UV light!
Attached Image: spartiumJunceum_uvBaad_sun_20210525_23018laSecuelapn01.jpg



The following are all small crops from 6016x4016 photos.

Visible Light [f/8 for 1/1250" @ ISO-100 in Sunlight with Baader UVIR-Block Filter]
Attached Image: spartiumJunceum_vis_sun_20210525_23171laSecuela.jpg


Ultraviolet Light [f/8 for 1/15" @ ISO-400 in Sunlight with BaaderU UV-Pass Filter]
Attached Image: spartiumJunceum_uvBaad_sun_20210525_23175laSecuelapn01.jpg


Infrared Light [f/16 for 1/800" @ ISO-100 in Sunlight with B+W 092 IR-Pass Filter]
Attached Image: spartiumJunceum_ir092_sun_20210525_23185laSecuelapn01.jpg


UV+Blue+Green [f/11 for 1/30" @ ISO-400 in Sunlight with UG5(2.0mm) + S8612(2.0mm)]
Attached Image: spartiumJunceum_ug5x2_s8612x2_sun_20210525_23181laSecuelapn01.jpg


Visible Light [f/11 for 1/800" @ ISO-100 in Sunlight with Baader UVIR-Block Filter]
Abaxial Visible view of the flower's banner.
Attached Image: spartiumJunceum_vis_sun_20210525_23228laSecuelapn01v2.jpg


Ultraviolet Light [f/11for 1/13" @ ISO-800 in Sunlight with BaaderU UV-Pass Filter]
Abaxial UV view of the flower's banner.
Attached Image: spartiumJunceum_uvBaad_sun_20210525_23224laSecuelapn01.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.

#2 Stefano

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Posted 28 May 2021 - 22:23

There aren’t many flowers with two UV colors. Interesting.

#3 Andrea B.

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Posted 28 May 2021 - 22:57

No, there aren't. I should make a list someday.
Andrea G. Blum
Often found hanging out with flowers & bees.

#4 colinbm

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Posted 29 May 2021 - 00:09

Fascinating Andrea