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UltravioletPhotography

Oenothera speciosa [Pink Ladies]


Andrea B.

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Blum, A.G. (2021) Oenothera speciosa Nutt. (Onagraceae) Pink Ladies. Flowers photographed in ultraviolet and visible light. https://www.ultravio...sa-pink-ladies/

 

La Secuela, Eldorado at Santa Fe, Santa Fe, New Mexico, USA

23 June 2021

Wildflower in home garden

 

Synonyms:

  • Hartmannia speciosa (Nutt.) Small
  • Oenothera delessertiana Steud.
  • Oenothera speciosa var. childsii (Bailey) Munz

Other Common Names:

  • Showy Primrose
  • Mexican Evening Primrose
  • Showy Evening Primrose
  • Amapola del Campo (Spanish)

Comment:

This native of the US prairies may not be wild in my particular area, but seeds and plants are often sold for the home garden. (I didn't plant it. It was here when I arrived.) Speciosa means "showy", and the lovely Pink Ladies are indeed showy.

 

While we do not have enough examples to make any kind of firm conclusion, it would seem that yellow Evening Primroses are fairly UV-reflective and show a false yellow, while white and pink Evening Primroses, like this one, are moderately UV-absorbing and become a false blue. (Look in the Onagraceae section for other photos of Evening Primroses.)

 

References:

1. Allred, Kelly W., Jercinovic, Eugene M., Ivey, Robert DeWitt (2021) Flora Neomexicana III: An Illustrated Identification Manual, Second Edition, Part 2, Oenothera Key, page 574. Print on demand at lulu.com.

2. SEINet Arizona-New Mexico Chapter (acc 25 June 2021) Oenothera speciosa.

This is a southwestern biodiversity organization making use of the Symbiota portal software.

 

 

Equipment [Nikon D610-broadband + Novoflex 35mm f/3.5 Noflexar]

 

 

Visible Light [f/16 for 2.5" @ ISO-100 in Ambient Skylight with Baader UVIR-Block Filter]

oenotheraSpeciosa_vis_ambientSkylight_20210623laSecuela_23927pn01.jpg

 

 

Ultraviolet Light [f/16 for 20" @ ISO-800 with SB-140 UV-Flash and BaaderU UV-Pass Filter]

2 flashes were made during the 20 sec. interval.

oenotheraSpeciosa_uvBaad_sb140_20210623laSecuela_23955pn01.jpg

 

 

Visible Light [f/16 for 3" @ ISO-100 in Ambient Skylight with Baader UVIR-Block Filter]

oenotheraSpeciosaAbaxial_vis_ambientSkylight_20210623laSecuela_23941pn01.jpg

 

 

Ultraviolet Light [f/11 for 30" @ ISO-100 with SB-140 UV-Flash and BaaderU UV-Pass Filter]

3 flashes were made during the 30 sec. interval.

oenotheraSpeciosaAbaxial_uvBaad_sb140_20210623laSecuela_23947pn01.jpg

 

 

UV+Blue+Green [f/11 for 30" @ ISO-800 in Ambient Skylight with U330(2.0mm) + S8612(2.0mm)]

oenotheraSpeciosa_u330x2_s8612x2_ambientSkylight_20210623laSecuela_23977pn01.jpg

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