Rudbeckia hirta [Quilled Black-eyed Susan]

[Andrea B.]

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

 

Middletown, New Jersey, USA

31 August 2008

Wildflower in home garden

 

Synonyms:

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

Comment:

For many years I have had wild Black-eyed Susans growing in my yard and garden. They freely reseed themselves and return annually. In 2008 there was a small patch which produced flowers with quilled rays. I have wondered if this was a spontaneous mutation or some kind of recessive trait showing up after a few generations of in-breeding in a small area?

 

Reference:

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

 

Equipment [Nikon D200-broadband + Novoflex 35mm f/3.5 Noflexar]

 

Visible Light [f/8 for 1/4000" @ ISO 280 in Sunlight with Baader UVIR-Block Filter]

 

Ultraviolet Light [f/8 for 1.5" @ ISO 280 in Sunlight with Baader UV-Pass Filter]