• Ultraviolet Photography
  •  

Calylophus hartwegii [Hartweg's Sundrops]

3 replies to this topic

#1 Andrea B.

    Desert Dancer

  • Owner-Administrator
  • 9,115 posts
  • Location: UVP Western Division, Santa Fe, New Mexico

Posted 14 June 2021 - 22:35

Blum, A.G. (2021) Calylophus hartwegii (Benth.) Raven (Onagraceae) Hartweg's Sundrops. Flowers photographed in ultraviolet, infrared, visible and mixed light. https://www.ultravio...twegs-sundrops/

El Dorado at Santa Fe, Santa Fe, New Mexico, USA
23 May 2020
Wildflower

Synonyms:
  • Oenothera hartwegii
Other Common Names:
  • Yellow Evening Primrose
.
Comment:
Because the fading flowers change color from bright yellow to shades of rose, salmon and orange, seeing the Hartweg's Sundrops plant on the side of a dusty road is a colorful treat. The flowers are all a bit floppy even when just opened.

Two key points of identification are the red-spotted sepals (photo #2 below) and the long tapering hypanthium under the sepals (photos #8 and #9 below).

Like other Sundrops, Hartweg's has an irregular UV-dark bull's-eye and throat with UV-black stamens and stigma. The hypanthium shows some strong false blue. There is UV-dark veining on both sides of the corolla.


References:
1. SEINet Arizona-New Mexico Chapter (acc 22 Mar 2021) Calylophus hartwegii.
This is a southwestern biodiversity organization making use of the Symbiota portal software.
2. Wildflowers of New Mexico (acc 22 Mar 2021) Calylophus hartwegii.
Website published and maintained by George Oxford Miller.
3. 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.
Note: FN III subsumes Calylophus, Gaura and Stenosiphon into Oenothera.
4. Finley, Willa F., Nieland, Lashara J. (2013) Land of Enchantment Wildflowers. Calylophus hartwegii, page 111. Texas Tech University Press, Lubbock, Texas.
5. Littlefield, Larry J., Burns, Pearl M. (2015) Wildflowers of the Northern and Central Mountains of New Mexico. Hartweg's Sundrops, page 181. University of New Mexico Press, Albuquerque, New Mexico.



Visible Light [f/11 for 1/320" @ ISO-220 in Sunlight with D850 + Micro-Nikkor 60/2.8G AFS]
A plant of many colors.
Attached Image: calylophusHartwegii_vis_sun_20200522aveTorreon_6907pn.jpg


Visible Detail
Note the red-spotted sepals of the flower bud.
Attached Image: calylophusHartwegii_vis_sun_20200522aveTorreon_691601.jpg


Visible Light [f/11 for 1/320" @ ISO-140 in Sunlight with D850 + Micro-Nikkor 60/2.8G AFS]
The bright yellow flower is lovely against the sunset tints of the fading flowers.
Attached Image: calylophusHartwegii_vis_sun_20200522aveTorreon_6912.jpg


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

Click any photo to enlarge it.

Visible Light [f/8 for 1/1000" @ ISO-200 in Sunlight with Baader UV/IR-Cut Filter]
Sundrops have an entire stigma unlike their Evening Primrose cousins whose stigma is lobed.
Attached Image: calylophusHartwegii_vis_sun_20200523aveTorreon_19503_05pnStack01.jpg


Infrared Light [f/8 for 1/1000" @ ISO-400 in Sunlight with RG780 IR-Pass Filter]
Attached Image: calylophusHartwegii_rg780_sun_20200523aveTorreon_19552pn01.jpg


Ultraviolet Light [f/8 for 1/250" @ ISO-800 in Sunlight & SB-14 Fill Flash with Baader UV/IR-Cut Filter]
Attached Image: calylophusHartwegii_uvBaad_sb14_20200523aveTorreon_19539pn01Stack.jpg


UV+Blue+Green [f/8 for 1/20" @ ISO-800 in Sunlight with U330 (2.0 mm) + S8612 (2.0 mm)]
Attached Image: calylophusHartwegii_u330x2_s8612x2_sun_20200523aveTorreon_19543pnStack01.jpg


Visible Light [f/8 for 1/1000" @ ISO-200 in Sunlight with Baader UV/IR-Cut Filter]
Note the long tapering hypanthium and, again, the red-spotted sepals.
Attached Image: calylophusHartwegiiAbaxial_vis_sun_20200523aveTorreon_19563pn01.jpg


Ultraviolet Light [f/8 for 1/20" @ ISO-800 in Sunlight with Baader UV/IR-Cut Filter]
The hypanthium shows some false blue.
Attached Image: calylophusHartwegiiAbaxial_uvBaad_sun_20200523aveTorreon_19569pn01.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.

#2 colinbm

    Member

  • Members+G
  • 2,741 posts
  • Location: Australia

Posted 15 June 2021 - 01:48

Nice examples Andrea.
The reproduction parts of this flower look similar to the Oriental Lily ?

#3 Andrea B.

    Desert Dancer

  • Owner-Administrator
  • 9,115 posts
  • Location: UVP Western Division, Santa Fe, New Mexico

Posted 17 June 2021 - 07:22

Yes, the pollen laden anthers supported in the middle by their filaments are like some lilies.
The filaments on this Sundrop seem to be attached around the edge of the throat.
On lilies the filaments extend from inside the throat.

But the typical lily stigma is not like this squarish plump stigma which seems very unusual to me
hanging off to the side of the flower. :cool:
Andrea G. Blum
Often found hanging out with flowers & bees.

#4 Andy Perrin

    Member

  • Members+G
  • 4,416 posts
  • Location: United States

Posted 17 June 2021 - 16:13

Love the blues on the rear. Nice work, Andrea!