• Ultraviolet Photography
  •  

Erigeron strigosus [Rough Fleabane]

1 reply to this topic

#1 Andrea B.

    Desert Dancer

  • Owner-Administrator
  • 7,456 posts
  • Location: USA

Posted 29 December 2012 - 07:14

Blum, A.G. (2012, 2016) Erigeron strigosus Muhl. ex Willd. (Asteraceae) Rough Fleabane. Flowers photographed in ultraviolet, visible and infrared light. Bee vision simulation included. http://www.ultraviol...rough-fleabane/
[Updated 27 July 2016]

Comment:
Erigeron strigosus and E. annuus can intergrade, however E. strigosus usually has entire lower leaves and stems with sparse, tightly appressed hairs while E. annuus has coarsely toothed leaves and spreading stem hairs. The almost linear leaves of E. strigosus are relatively narrower than the leaves of E. annuus. The corolla and disc in both species are UV-dark.

Reference:
1. Jepson eFLora. (2012). Key to Erigeron. Jepson Herbarium, U. of Cal.-Berkeley, Berkeley, CA.
http://ucjeps.berkel..._IJM.pl?key=429
2. New England Wild Flower Society (2016) Erigeron strigosus. Rough Fleabane. https://gobotany.new...eron/strigosus/

SET 1
Middletown, New Jersey, USA
17 June 2007
Wildflower

Equipment [Nikon D200-broadband + Nikon 105mm f/4.5 UV-Nikkor]

Visible Light [f/16 for 1/125" @ISO400 in Sunlight with Baader UVIR-Block Filter]
Attached Image: erigeronStrigosusVis061707wf_14596proofPnCrop.jpg

Ultraviolet Light [f/16 for 2" @ISO400 in Sunlight with Baader UV-Pass Filter]
Attached Image: erigeronStrigosusUV061707wf_14603proofPnCrop.jpg


SET 2
Tinton Falls, New Jersey, USA
27 June 2016
Wildflower

Equipment [Nikon D600-broadband + Carl Zeiss 60mm f/4.0 UV-Planar]

Visible Light [f/11 for 1/160" @ ISO-800 in Sunlight with Baader UVIR-Block Filter]
Attached Image: erigeronStrigosus_visSun_20160627tintonFallsNJ_46760pn.jpg

Visible Light [f/11 for 1/200" @ ISO-800 with Onboard Flash and Baader UVIR-Block Filter]
Attached Image: erigeronStrigosusAbaxial_visSun_20160627tintonFallsNJ_46838pn.jpg

Visible Light [f/11 for 1/50" @ ISO-800 in Sunlight with Baader UVIR-Block Filter]
Note apressed hairs on stem.
Attached Image: erigeronStrigosusStem_visSun_20160627tintonFallsNJ_46818pn.jpg

Ultraviolet Light [f/11 for 8" @ ISO-400 in Sunlight with BaaderU UV-Pass Filter]
Attached Image: erigeronStrigosus_uvBaadSun_20160627tintonFallsNJ_46748pn.jpg

UV+Blue+Green [f/4 for 1/8" @ ISO-800 in Sunlight with UG5(1.5mm) + S8612(1.75mm)]
Attached Image: erigeronStrigosus_ug5_s8612_175_Sun_20160627tintonFallsNJ_46785pn01.jpg

Infrared Light [f/11 for 1/200" @ ISO-800 in Sunlight with B+W 092 IR-Pass Filter]
Attached Image: erigeronStrigosus_092IrSun_20160627tintonFallsNJ_46763pn.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.

#2 Andrea B.

    Desert Dancer

  • Owner-Administrator
  • 7,456 posts
  • Location: USA

Posted 07 July 2016 - 21:00

[Updated 27 July 2016]

SET 3
Shore Cottage, Southwest Harbor, Maine, USA
10 August 2014
Wildflower

Comment: An abaxial view of some E. strigosus capitulua is included.
There is a tangle of animal hair on some of the flowers.

Equipment [Nikon D600-broadband + Carl Zeiss 60mm f/4.0 UV-Planar]

Visible Light [f/11 for 2" @ ISO-100 in Sunlight with Baader UVIR-Block Filter]
Deer and other animals frequent the field where this Erigeron was found.
Attached Image: erigeronStrigosus_visSun_20140710_swhME_20386pn.jpg

Visible Light [f/11 for 2.5" @ ISO-100 with Onboard Flash and Baader UVIR-Block Filter]
Attached Image: erigeronStrigosusAbaxial_visFlash_20140710_swhME_20432pn.jpg

Visible Light [f/11 for 3" @ ISO-X100XX with Onboard Flash and Baader UVIR-Block Filter]
Stem shows apressed hairs.
Attached Image: erigeronStrigosusStem_visFlash_20140710_swhME_20445pn.jpg

Ultraviolet Light [f/11 for 20" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]
Long UV exposures were used to permit multiple flashes.
Attached Image: erigeronStrigosus_uvBaadSB14_20140710_swhME_20405pf.jpg

Ultraviolet Light [f/11 for 15" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]
Attached Image: erigeronStrigosusAbaxial_uvBaadSB14_20140710_swhME_20436pf.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.