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UltravioletPhotography

Stephanomeria pauciflora [Brownplume Wire-lettuce]


Andrea B.

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Blum, A.G. (2013) Stephanomeria pauciflora (Torrey) A.Nelson (Asteraceae) Brownplume Wire-lettuce. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...e-wire-lettuce/

 

Boyce Thompson Arboretum, Superior, Arizona, USA

25 April 2013

Wildflower

 

Synonyms:

  • Prenanthes pauciflora Torrey
  • Stephanomeria cinerea (S.F. Blake) S.F. Blake
  • Stephanomeria lygodesmoides M. E. Jones ex L. F. Henderson
  • Stephanomeria runcinata Nutt. var. parishii Jeps.
  • Stephanomeria var. parishii (Jeps.) Munz
  • Stephanomeria var. pauciflora

Other Common Names:

  • Desert Straw
  • Desert Wire-lettuce
  • Few-flowered Wire-lettuce

 

Comment:

Poor (pauci) in flowers (flora) aptly describes this shrub with its intricate, branched thicket of blue-green wiry stems. Look closely because the 5 pale pink/lavender notched ligules of each tubular flower seem to form what appears to be the corolla of a single flower. In ultraviolet the ligules are of a moderate UV-tonality with UV-dark filaments topped by brighter curly anthers. The seed is topped with plumey bristles.

 

Reference:

1. Morhardt, S. & E. (2004) Stephanomeria pauciflora, page 74. California Desert Flowers. The U. of Cal. Press, Berkeley, CA.

 

Equipment:

[Nikon D600-broadband + Nikon 105mm f/4.5 UV-Nikkor]

[Nikon Coolpix A]

 

Visible Light [f/5.6 for 1/100” @ ISO 100 with Coolpix A]

stephanomeriaPaucifloraPlantVisSun_042313boyceThompsonArbSuperiorAZ_547origProofPn01.jpg

 

Visible Light [f/8 for 1/640” @ ISO 200 in Sunlight with Baader UVIR-Block Filter]

stephanomeriaPaucifloraVisSun_042313boyceThompsonArbSuperiorAZ_8577origProofPn.jpg

 

Ultraviolet Light [f/8 for 1/125” @ ISO 400 with SB-14 UV-modified Flash and Baader UV-Pass Filter]

stephanomeriaPaucifloraUVBaadSB14_042313boyceThompsonArbSuperiorAZ_8617origProofPn.jpg

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