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Eriogonum fasciculatum var. polifolium [Eastern Mohave Buckwheat]


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#1 Andrea B.

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Posted 12 April 2014 - 01:15

Blum, A.G. (2014) Eriogonum fasciculatum Bentham var. polifolium (Bentham) Torrey & A. Gray (Polygonaceae) Eastern Mohave Buckwheat. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...have-buckwheat/

Boyce Thompson Arboretum, Superior, Arizona, USA
23 April 2013
Wildflower

Synonyms:
  • California Buckwheat
  • Eriogonum polifolium Bentham in A. P. de Candolle and A. L. P. P. de Candolle
  • E. fasciculatum var. revolutum (Goodding) S. Stokes
Comment:
Some of the inflorescences seen on the E. fasciculatum shown here formed slightly flattened umbels, while others looked like pale pink fluffy snowballs. Eastern Mohave Buckwheat is distinguished from the other California Buckwheat varieties by its pubescent flowers which are marked with a hairy pink star against the white perianth. Note also the pink anthers on sometimes curly stamens.
Native to the Western US, the California Buckwheats have seen wide use in Native American medicine. The plants are an important food source for several butterfly species.
In Ultraviolet light, the flower cluster takes on a mottled appearance, mostly UV-dark, with UV-bright hairs.

Reference:
1. Flora of North America Online (2014) Eriogonum fasciculatum var. polifolium, vol. 5. FNA, New York & Oxford. http://www.efloras.o...on_id=250060285

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

Visible Light [f/6.3 for 1/200" @ ISO 100 with Nikon Coolpix A]
Attached Image: eriogonumFasciculatumVisSun_042313boyceThomArbSupAZ_562origProofPn.jpg

Visible Light [f/11 for 1/200" @ ISO 200 with onboard Flash and Baader UVIR-Block Filter]
Attached Image: eriogonumFasciculatumVisFlash_042313boyceThomArbSupAZ_8790proofPn2.jpg

Visible Light [detail from preceding photograph]
Attached Image: eriogonumFasciculatumVisFlash_042313boyceThomArbSupAZ_8790proofPn2Crop100.jpg

Ultraviolet Light [f/8 for 1/80" @ ISO 400 with SB-14 UV-modified Flash and Baader UV-Pass Filter]
Attached Image: eriogonumFasciculatumUVBaadSB14_042313boyceThomArbSupAZ_8801proofPnCrop.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.