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Cardamine impatiens [Narrowleaf Bittercress]

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#1 Andrea B.

    Desert Dancer

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Posted 18 March 2017 - 20:29

Blum, A.G. (2017) Cardamine impatiens L. (Brassicaceae) Narrowleaf Bittercress. Flowers photographed in ultraviolet and visible light. UV-induced visible fluorescence included. http://www.ultraviol...mine-impatiens/

Holmdel Park, Holmdel, New Jersey, USA
11 May 2010
Wildflower

Comment:
The various Cardamines are early spring bloomers in New Jersey. Although C. impatiens has become somewhat invasive, it is a pretty plant with its fluffly white flower cluster and its feathery pinnately compound leaves.
The most striking feature of its UV appearance are the white-striped anthers. The petals are brighter in UV than the unopened buds. Under blacklight, the petals fluoresce blue or blue-violet against a background of red chlorophyll fluorescence.

Reference:
1. New England Wild Flower Society (March 2017) Cardamine impatiens. Narrow-leaved Bittercress.
https://gobotany.new...mine/impatiens/

Equipment [Nikon D200-broadband + Carl Zeiss 60mm f/4.0 UV-Planar]
Unless otherwise noted.

Set 1
Visible Light [f/8 for 1/8" @ ISO-400 with Onboard Flash and Baader UVIR-Block Filter]
Attached Image: cardamineImpatiensVis051110holmdelParkHolmdelNJ_42337origpn.jpg

Ultraviolet Light [f/8 for 1.5" @ ISO-400 with Nichia 365nm UV-LED and BaaderU UV-Pass Filter]
Attached Image: cardamineImpatiens365UV051110holmdelParkHolmdelNJ_42342pfpn.jpg

UV-Induced Visible Fluorescence [f/8 for 1.5" @ ISO-400. Nichia 365nm UV-Led (unfiltered). Lens with Baader UVIR-Block Filter. Photographed in Darkness.]
Attached Image: cardamineImpatiens365UVIndVisFluor051110holmdelParkHolmdelNJ_42340pf.jpg

Visible Light [f/5.6 for 1/125" @ ISO-1200 with Nikon D3S + Nikon 60mm f/2.8G Micro-Nikkor in Sunlight]
Attached Image: cardamineImpatiensVis051110holmdelParkHolmdelNJ_7855pnCrop.jpg

Visible Light [f/4.5 for 1/100" @ ISO-800 with Nikon D3S + Nikon 60mm f/2.8G Micro-Nikkor in Sunlight]
Attached Image: cardamineImpatiensVis051110holmdelParkHolmdelNJ_7849pf.jpg

Set 2
Visible Light [f/8 for 1/8" @ ISO-400 with Onboard Flash and Baader UVIR-Block Filter]
Attached Image: cardamineImpatiensVis051110holmdelParkHolmdelNJ_42320origpn.jpg

Ultraviolet Light [f/8 for 2" @ ISO-400 with Nichia 365nm UV-LED and BaaderU UV-Pass Filter]
Attached Image: cardamineImpatiens365UV051110holmdelParkHolmdelNJ_42331origpn.jpg

UV-Induced Visible Fluorescence [f/8 for 1.5" @ ISO-400. Nichia 385nm UV-Led (unfiltered). Lens with Baader UVIR-Block Filter. Photographed in Darkness.]
Attached Image: cardamineImpatiens385UVIndVisFluor051110holmdelParkHolmdelNJ_42326origpn.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.

#2 nfoto

    Fierce Bear of the North

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Posted 18 March 2017 - 21:01

Narrow-leaved Bitter-Cress appears to be the English common name. This species evidently is not native to North America.

Very nice and informative presentation, by the way.
Bjørn Birna Rørslett