Lily Salleh
Kuala Lumpur
20 Nov
Taken by Achick
Photonastic movement of Oxalis triangularis
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Time-lapse video of the nastic movements of an Oxalis triangularis plant. The leaves open and close in response to varying light levels with the result that they are open during the day and close at night. This is true movement (i.e. not growth) and is non-directional with respect to the stimulus.
Video: Richard Wheeler
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