Spiraea alba [White Meadowsweet]

[Andrea B.]

Blum, A.G. 2013. Spiraea alba var. latifolia (Ait.) Dippel. (Rosaceae). White Meadowsweet. Flowers photographed in ultraviolet and visible light, fluorescence included. http://www.ultraviol...ite-meadowsweet

Southwest Harbor, Maine, USA

14 July 2012

 

Comment: Flora Nova Angliae ⁽¹⁾ notes that S. alba var. alba is known from Massachusetts and Vermont while S. alba var. latifolia occurs more widely in New England.

 

Synonyms:

• Spiraea alba var. septentrionalis (Fern.) Seymour
  
• Spiraea latifolia (Ait.) Borkh.
  
• Spiraea latifolia (Ait.) Borkh. var. septentrionalis Fern.
  
• Spiraea septentrionalis (Fern.) A. & D. Löve
  

Reference:

1. New England Wild Flower Society (2013) Spiraea alba Du Roi. White Meadowsweet. http://gobotany.newe...s/spiraea/alba/

 

Equipment [Nikon DX00-broadband + Carl Zeiss 60mm f/4.0 UV-Planar]

 

Visible Light [f/11 for 1/60" @ ISO 200 with onboard Flash and Baader UVIR-Block Filter]

 

Ultraviolet Light [f/11 for 1/60" @ ISO XXX with SB-14 UV-modified Flash with Baader UV-Pass Filter]

 

Detail from Visible Frame

 

Detail from Ultraviolet Frame

 

UV-Induced Visible Fluorescence [f/xxx for 1/xxx" @ ISO xxx. Nichia 365 UV-Led + Baader-UV-Pass Filter. Lens + Baader UVIR-Block Filter. Photographed in Darkness.]

Note: This photo has not been formally colour-calibrated, so the colours of the Fluorescence may not be entirely accurate.

The five fluorescent stigmas and fluorescent pollen are nicely seen.