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Epilobium ciliatum [Fringed Willow-herb]

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#1 Andrea B.

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Posted 08 July 2017 - 17:10

Blum, A. G. (2017) Epilobium ciliatum Raf. (Onagraceae) Fringed Willow-herb. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...ed-willow-herb/

Southwest Harbor, Maine, USA
18 July 2014
Wildflower

Synonyms:
  • Epilobium adenocaulon Hausskn.
  • Epilobium adenocaulon Hausskn. var. ecomosum (Fassett) Munz
  • Epilobium americanum Hausskn.
  • Epilobium ciliatum var. ecomosum (Fassett) Boivin
  • Epilobium glandulosum var. adenocaulon (Hausskn.) Fern.
  • Epilobium glandulosum Lehm. var. ecomosum Fassett
Other Common Names:
  • American Willow-herb
  • Glandular Willow-herb
  • Northern Willow-herb
  • Seaside Basil
Comment:
A key point of differentiation between E. ciliatum and the similar E. coloratum is that E. ciliatum seeds have a whitish tuft of hair. This was observed on the specimen plant.
In UV the reproductive parts are UV dark. The corolla shows a subtle UV-light/dark striping perhaps due to some iridiscence. The pollen is UV-bright.

Reference:
1. New England Wild Flower Society (20147) Epilobium ciliatum Raf. Fringed Willow-herb. https://gobotany.new...obium/ciliatum/
2. Haines, A. (2011) Flora Novae Angliae. Epilobium key, page 682. Epilobium ciliatum, page 683. Yale University Press, New Haven, CT.

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

Visible Light [f/11 for 1/1.3" @ ISO-400 in Sunlight with Baader UVIR-Block Filter]
E. ciliatum has paler pink to white flowers.
Attached Image: epilobiumCiliatum_visSun_20140718shoreCottageSwhME_22904pnPf.jpg

Visible Light [f/11 for 1" @ ISO-400 with Onboard Flash and Baader UVIR-Block Filter]
Attached Image: epilobiumCiliatum_visFlash_20140716shoreCottageSwhME_22428pn.jpg

Ultraviolet Light [f/11 for 1/60" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]
Attached Image: epilobiumCiliatum_uvBaadSB14_20140715shoreCottageSwhME_22403pf.jpg

Ultraviolet Light [f/11 for 15" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]
A long exposure was made to permit multiple flashes for more even coverage.
Attached Image: epilobiumCiliatum_uvBaadSB14_20140718shoreCottageSwhME_22924pf.jpg

Various Identifying Photos

Seed pod
Attached Image: epilobiumCiliatumSeedPod_visFlash_20140716shoreCottageSwhME_22444pnPf.jpg

Leaves
Attached Image: epilobiumCiliatumLeaves_visFlash_20140716shoreCottageSwhME_22442pnPf.jpg

Leaf, abaxial side
Attached Image: epilobiumCiliatumLeaf_visFlash_20140716shoreCottageSwhME_22418pnPf.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.