Rudbeckia hirta [Black-eyed Susan]

[Andrea B.]

Blum, A.G. (2013) Rudbeckia hirta L. (Asteraceae) Black-eyed Susan. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...ack-eyed-susan/

Ellsworth, Maine, USA

20 July 2012

Wildflower

 

Synonyms:

• Black-eyed Coneflower
  
• Rudbeckia hirta var. lanceolata (Bisch.) Core
  
• Rudbeckia hirta var. serotina (Nutt.) Core
  
• Rudbeckia serotina Nutt.
  

Comment: This was an actual wild R. hirta found growing in a dry weedy lot near the Home Depot in Ellsworth, Maine. Usually I see only the garden varieties. R. hirta and other Rudbeckiasare canonical test flowers for UV photography because they have the classic UV-dark, central bullseye over the disc and a large portion of the rays with UV-bright ray tips.

 

Reference:

1. New England Wild Flower Society (2013) Rudbeckia hirta L. Black-eyed Susan. http://gobotany.newe...udbeckia/hirta/

 

Equipment [Nikon D300-broadband + Carl Zeiss 60mm f/4.0 UV-Planar]

 

Visible Light [f/11 for 1/3" @ ISO 200 with onboard Flash and Baader UVIR-Block Filter]

 

Ultraviolet Light [f/8 for 1/60" @ ISO 200 with SB-14 UV-modified Flash and Baader UV-Pass Filter]

 

Visible Light [f/11 for 1/3" @ ISO 200 with onboard Flash and Baader UVIR-Block Filter]

 

Ultraviolet Light [f/11 for 1/3" @ ISO 200 with SB-14 UV-modified Flash and Baader UV-Pass Filter]