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Peritoma arborea [Bladderpod]


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#1 Andrea B.

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Posted 08 March 2013 - 21:41

Blum, A.G. (2013, 2016) Peritoma arborea (Nuttall) H.H.Iltis (Cleomaceae) Bladderpod. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...rea-bladderpod/

Synonyms:
  • Burrofat
  • Cleome isomeris Greene
  • Isomeris arborea Nuttall
Comment:
This native California shrub, often as tall as 6', can be completely covered with flowers in a good rainfall year. Blooming is sequential up the stem, so the long inflated seed pods are seen hanging below the flowers. In UV, the petals are UV-reflective while the flower throat and reproductive parts are UV dark. This is one of the flowers which changes its false colour in UV as it ages, the petals becoming less UV-reflective.


Reference:
1. Jepson eFlora (2013) Peritoma arborea. Jepson Herbarium, U. of Cal.-Berkeley, Berkeley, CA. http://ucjeps.berkel...JM.pl?tid=91907

Set 1
Mohave National Preserve, San Bernadino County, California, USA
02 March 2012
Wildflower

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

Visible Light [f/8 for 1/1000" @ ISO 200 with Nikon D3S]
Attached Image: peritomaArboreaHabitVisSun030212mohaveNpCA_34611origProofPn.jpg

Visible Light [f/8 for 1/1000" @ ISO 200 with Nikon D3S]
We were a bit early for seeing the pods in this area. Some were just beginning to emerge on this shrub.
Attached Image: peritomaArboreaVisSun030212mohaveNpCA_34624origProofPn.jpg

Visible Light [f/8 for 1/500" @ ISO 400 in Sunlight with Baader UVIR-Block Filter]
Ants find their way through a tangle of curly stamens.
Attached Image: peritomaArboreaVisSun030212mohaveNpCA_22456proofPnCrop.jpg

Ultraviolet Light [f/8 for 1/160" @ ISO 400 with SB-14 UV-modified Flash and Baader UV-Pass Filter]
Attached Image: peritomaArboreaVUVBaadSB14_030212mohaveNpCA_22464proofPnCrop.jpg

Set 2
Visitor's Center, Death Valley National Park, Furnace Creek, California, USA
01 March 2012
Wildflower

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

Visible Light [f/9.5 for 1/1000" @ ISO 200 with Nikon D3S]
The pods are developing quickly on this young plant.
Attached Image: peritomaArboreaVAngustataVisSun03012012deathValleyNpCA_34401origProofPn.jpg

Ultraviolet Light [f/8 for 1/250" @ ISO 800 with SB-14 UV-modified Flash and Baader UV-Pass Filter]
Not such a great photo, but it does serve to show P. arborea's UV-dark pods, sepals, stamens and buds. The stem by contrast is quite UV-bright.
Attached Image: peritomaArboreaVAngustataUVBaadSB14_03012012deathValleyNpCA_22319origProofPn.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.

#2 Andrea B.

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Posted 26 May 2016 - 19:09

Set 3
Along Kelbaker Road, Mohave National Preserve, San Bernadino County, California, USA
20 February 2016
Wild shrub in flower

Comment:
This bladderpod was in full bloom and thriving. It was covered with thousands of flowers and pods. It has apparently grown up around some other shrub which shows up as a lighter section just to the right of the center in both the Visible and UV versions.
It is easy to see in the UV excerpt that only the newest flowers in each cluster present the signature of false UV yellow petals with UV-dark throats. The surrounding, older flowers are rather uniformly drab in UV.

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

Visible Light [f/11 for 1/1000" @ ISO-100 in Sunlight with Baader UVIR-Block Filter]
Attached Image: peritomaArborea_visSun_20160220mohaveNatPresCA_43841pn02.jpg

Visible Light [Detail from preceding photo]
Attached Image: peritomaArborea_visSun_20160220mohaveNatPresCA_43841.jpg

Ultraviolet Light [f/11 for 1/5" @ ISO-100 in Sunlight with Baader UV-Pass Filter]
Attached Image: peritomaArborea_uvBaadSun_20160220mohaveNatPresCA_43848pn02.jpg

Ultraviolet Light [Detail from preceding photo]
Attached Image: peritomaArborea_uvBaadSun_20160220mohaveNatPresCA_43848pn.jpg

Infrared Light [f/16 for 1/320" @ ISO-200 in Sunlight with B+W 093 IR-Pass Filter]
Attached Image: peritomaArborea_093IrSun_20160220mohaveNatPresCA_43866pn02.jpg

Infrared Light [Detail from preceding photo]
Attached Image: peritomaArborea_093IrSun_20160220mohaveNatPresCA_43866pn.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.