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Oxalis stricta [Yellow Wood Sorrel]: Another Example


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#1 Andrea B.

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Posted 23 May 2015 - 00:02

Blum, A.G. (2015) Another Example of Oxalis stricta L. (Oxalidaceae) Yellow Wood Sorrel. Flowers photographed in ultraviolet and visible light. LINK

Middletown, New Jersey, USA
14 May 2014
Wildflower

Synonyms:
  • Sourgrass
  • Sour Pickle
  • Common Yellow Oxalis
  • Oxalis europaea Jord.
  • Oxalis fontana Bunge
Comment:
Rørslett (2015) first showed a Norwegian Oxalis stricta in ultraviolet(1). Here is a US example which also exhibits a similar false-yellow with darker striping in UV.
The seedpods of O. stricta are explosively dehiscent and can cause quite a commotion if too many plants are left unweeded in the home garden.

Reference:
1. Rørslett, B. (2015) Oxalis stricta L. (Oxalidaceae) Yellow Wood Sorrel. Flowers photographed in visible and ultraviolet light. LINK

Equipment [Nikon D600-broadband + Carl Zeiss 60mm f/4.0 UV-Planar]

Visible Light [f/4 for 1/1000" @ ISO-400 in Sunlight with Baader UVIR-Block Filter]
Attached Image: oxalisStrictaVisSun_051413wf_11429origpn01.jpg

Ultraviolet Light [f/4 for 1/200" @ ISO-400 with SB-14 UV-modified Flash and Baader UV-Pass Filter]
Attached Image: oxalisStrictaUVBaadSB14_051413wf_11451pf.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.

#2 colinbm

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Posted 23 May 2015 - 12:51

Lovely little flower Andrea
Col

#3 msubees

    Zach Huang

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Posted 23 May 2015 - 21:29

what is the size of this flower? I have shot a tiny one here, growing wild on my lawn, with the same UV signatures. they are tiny, about 3mm across.

#4 nfoto

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Posted 23 May 2015 - 21:59

The O. stricta I'm familiar with has flowers several times larger.

#5 msubees

    Zach Huang

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Posted 24 May 2015 - 21:11

Bjorn,

Thanks. so what I have here must be a different species.

View Postnfoto, on 23 May 2015 - 21:59, said:

The O. stricta I'm familiar with has flowers several times larger.