Oenothera caespitosa [Tufted Evening Primrose]

[Andrea B.]

Blum, A.G. (2013) Oenothera caespitosa Nutt. (Onagraceae) Tufted Evening Primrose. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...ening-primrose/

 

Ajo, Arizona

10 March 2012

Wildflower in home garden

 

Synonyms:

• Stemless Primrose
  
• Sandlily
  

Comment: The snowy white, heart-shaped petals turn pink with age. The blooms stay open at night and are visited by night moths. In UV the corolla shows some dark spokes, the filaments, stigma and pollen are UV-black and the anthers are brighter showing light blue in our standardized colour scheme.

 

Reference:

1. Epple, A.O. (1995) Stemless Primrose, page 173. A Field Guide to the Plants of Arizona. Falcon Guides, Globe Pequot Press, Guilford, CT.

 

Equipment

[Nikon D3S + Nikon f2.8 AFS Micro-Nikkor]

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

 

Visible Light [f/8 for 1/1500" @ ISO 400 with D3S]

 

Visible Light [f/4 for 1/1000" @ ISO 400 with D3S]

 

Visible Light [f/8 for 1/250" @ ISO 400 in Sunlight with Baader UVIR-Cut Filter]

 

Ultraviolet Light [f/8 for 1/60" @ ISO 400 with SB-14 UV-modified Flash andBaader UV-Pass Filter]

 

Ultraviolet Light [f/8 for 1/3" @ ISO 400 with SB-14 UV-modified Flash and Baader UV-Pass Filter]